{"id":7661,"date":"2026-08-09T13:50:33","date_gmt":"2026-08-09T17:50:33","guid":{"rendered":"https:\/\/laboratorytesting.com\/?page_id=7661"},"modified":"2026-08-09T14:08:43","modified_gmt":"2026-08-09T18:08:43","slug":"radium-226-and-radium-228","status":"publish","type":"page","link":"https:\/\/laboratorytesting.com\/fr\/resources\/radiochemistry\/radium-226-and-radium-228\/","title":{"rendered":"Radium 226 et radium 228"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"7661\" class=\"elementor elementor-7661\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f0777b3 bg-four-corner-image elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f0777b3\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4760a46\" data-id=\"4760a46\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4f2fe9f elementor-widget elementor-widget-heading\" data-id=\"4f2fe9f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Radiochimie - Radium 226 et Radium 228<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a7f38a0 elementor-widget elementor-widget-image\" data-id=\"a7f38a0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1440\" height=\"507\" src=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/radon-in-air.jpg\" class=\"attachment-full size-full wp-image-7502\" alt=\"\" srcset=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/radon-in-air.jpg 1440w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/radon-in-air-300x106.jpg 300w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/radon-in-air-1024x361.jpg 1024w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/radon-in-air-768x270.jpg 768w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/radon-in-air-18x6.jpg 18w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/radon-in-air-600x211.jpg 600w\" sizes=\"(max-width: 1440px) 100vw, 1440px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7516a42 elementor-widget elementor-widget-text-editor\" data-id=\"7516a42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Le radium (Ra) est un m\u00e9tal radioactif naturel qui existe sous forme de plusieurs isotopes. Il se forme lors de la d\u00e9sint\u00e9gration de l&#039;uranium (U) et du thorium (Th) dans l&#039;environnement. On le trouve naturellement en faibles quantit\u00e9s dans les sols, l&#039;eau, les roches, le charbon, les plantes et les aliments. Au fil du temps, le radium se d\u00e9sint\u00e8gre et lib\u00e8re du radium-226, du radium-228 et du radium-224. Si la demi-vie du radium-226 est tr\u00e8s longue (1\u00a0600 ans), celle du radium-228 n&#039;est que de 6,7 ans et celle du radium-224 est encore plus courte (3,5 jours).<\/p><p>Lorsque les diff\u00e9rents isotopes se d\u00e9sint\u00e8grent, ils peuvent p\u00e9n\u00e9trer dans l&#039;organisme par l&#039;ingestion d&#039;aliments, d&#039;eau ou par absorption cutan\u00e9e. \u00c0 long terme, l&#039;exposition \u00e0 ces isotopes peut entra\u00eener de nombreuses maladies et causer des dommages internes. <sup>1,2,3<\/sup>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f03399 elementor-widget elementor-widget-heading\" data-id=\"1f03399\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Radium 226 et 228\u00a0: pourquoi leur analyse est-elle si longue\u00a0?<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9cedc12 elementor-widget elementor-widget-text-editor\" data-id=\"9cedc12\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>L&#039;analyse du radium-226 et du radium-228 implique la mesure de la vitesse de d\u00e9sint\u00e9gration de leurs isotopes respectifs au fil du temps. Apr\u00e8s la pr\u00e9paration des \u00e9chantillons, la d\u00e9sint\u00e9gration du radium-224, isotope form\u00e9 \u00e0 partir du radium-228, prend du temps. On mesure d&#039;abord le radium-228, puis le radium-226 une fois que le radium-224 est presque enti\u00e8rement d\u00e9sint\u00e9gr\u00e9. Si un \u00e9chantillon contient une forte concentration de radium-228, le temps de d\u00e9sint\u00e9gration sera plus long. \u00c0 l&#039;heure actuelle, les technologies et les instruments disponibles ne permettent pas de r\u00e9aliser ces analyses plus rapidement tout en respectant les seuils de d\u00e9tection requis par l&#039;EPA.<\/p><p>L&#039;analyse est rapport\u00e9e dans une unit\u00e9 standard de picocuries par litre (pCi\/L) ou de microgrammes par litre (\u00b5g\/L).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-0a5a490 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0a5a490\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-ed7fcda\" data-id=\"ed7fcda\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-69c2b44 elementor-widget elementor-widget-heading\" data-id=\"69c2b44\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Conteneur d&#039;\u00e9chantillonnage d&#039;eau<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d55c47 elementor-widget elementor-widget-text-editor\" data-id=\"8d55c47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Flacon d&#039;\u00e9chantillon :<\/strong> 2 L<br \/><strong>Identifiant produit EMSL\u00a0:<\/strong> 8714201<br \/><strong>Conservateur:<\/strong> 5 mL d&#039;acide nitrique<br \/><strong>Exigences d&#039;exp\u00e9dition\u00a0:<\/strong> Pas besoin de glace<br \/><strong>Temps d&#039;attente\u00a0:<\/strong> 6 mois \u00e0 compter de la collecte<br \/><strong>M\u00e9thode Radium-226 EPA 904 Limite de d\u00e9tection\u00a0:<\/strong> 1 pCi\/L<br \/><strong>M\u00e9thode Radium-228 EPA 903 Limite de d\u00e9tection\u00a0:<\/strong> 1 pCi\/L<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-c4ddb6e\" data-id=\"c4ddb6e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8598ef2 elementor-widget elementor-widget-image\" data-id=\"8598ef2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"374\" height=\"499\" src=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/water-sampling-container-2.jpg\" class=\"attachment-full size-full wp-image-7667\" alt=\"\" srcset=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/water-sampling-container-2.jpg 374w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/water-sampling-container-2-225x300.jpg 225w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/water-sampling-container-2-9x12.jpg 9w\" sizes=\"(max-width: 374px) 100vw, 374px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-0714395 elementor-widget elementor-widget-heading\" data-id=\"0714395\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Directives relatives aux examens radiologiques<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17651c9 tp-shortcode elementor-widget elementor-widget-shortcode\" data-id=\"17651c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-100\" class=\"tablepress tablepress-id-100 tp-all-border tp-y-padding-zero tp-text-center tp-font-size-inherit tp-x-padding-high tp-green-color-scheme tp-text-bold tbody-has-connected-cells\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\"><strong>R\u00e9sultats bruts Alpha\/Beta<\/strong><\/th><th class=\"column-2\"><strong>Contamination potentielle<\/strong><\/th><th class=\"column-3\"><strong>Tests compl\u00e9mentaires recommand\u00e9s<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">&lt; 5 pCi\/L<\/td><td class=\"column-2\">Niveaux de base<\/td><td class=\"column-3\">Aucun<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">5-15 pCi\/L<\/td><td class=\"column-2\">Radium possible<\/td><td class=\"column-3\">Radium 226 et 228<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">&gt; 15 pCi\/L<\/td><td class=\"column-2\">Radium et uranium possibles<\/td><td class=\"column-3\">Radium 226, 228 et uranium<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td colspan=\"3\" class=\"column-1\"><div style=\"background-color: #B7D29A;margin-left: -20px;margin-right: -20px;\">Traitement recommand\u00e9 si\u00a0:<\/div><\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td colspan=\"3\" class=\"column-1\">Radium-226 + Radium-228 &gt; 5 pCi\/L OU<br \/>\nAlpha brut \u2013 Uranium &gt; 15 pCi\/L OU<br \/>\nUranium &gt; 30 \u00b5g\/L<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-100 from cache --><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-acb39f0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"acb39f0\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-57b72cb\" data-id=\"57b72cb\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-88eb835 tp-shortcode elementor-widget elementor-widget-shortcode\" data-id=\"88eb835\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-104\" class=\"tablepress tablepress-id-104 tp-all-border tp-y-padding-zero tp-text-center tp-font-size-inherit tp-x-padding-high tp-green-color-scheme tp-text-bold\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Loi sur l&#039;eau potable salubre (SDWA)<br \/>\nNormes<sup>3,4<\/sup><\/th><th class=\"column-2\">Limite maximale de contaminants<br \/>\n(MCL)<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Radium-226 + Radium-228<\/td><td class=\"column-2\">5 pCi\/L<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-104 from cache --><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-24547cf elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"24547cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"507\" height=\"276\" src=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/alpha-beta-counter-image-2-v2.jpg\" class=\"attachment-full size-full wp-image-7603\" alt=\"\" srcset=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/alpha-beta-counter-image-2-v2.jpg 507w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/alpha-beta-counter-image-2-v2-300x163.jpg 300w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/alpha-beta-counter-image-2-v2-18x10.jpg 18w\" sizes=\"(max-width: 507px) 100vw, 507px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-75b8b82 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"75b8b82\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Compteur Alpha\/B\u00eata<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-38efbc0\" data-id=\"38efbc0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-069b38c elementor-widget elementor-widget-image\" data-id=\"069b38c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"436\" height=\"534\" src=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/alpha-beta-counter-image-1-v2.jpg\" class=\"attachment-large size-large wp-image-7604\" alt=\"\" srcset=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/alpha-beta-counter-image-1-v2.jpg 436w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/alpha-beta-counter-image-1-v2-245x300.jpg 245w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/alpha-beta-counter-image-1-v2-10x12.jpg 10w\" sizes=\"(max-width: 436px) 100vw, 436px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-803585a elementor-widget elementor-widget-text-editor\" data-id=\"803585a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Compteur Alpha\/B\u00eata<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-4e6f5c1 elementor-widget elementor-widget-text-editor\" data-id=\"4e6f5c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><sup>1<\/sup> (Radium) \u2013 <a href=\"https:\/\/semspub.epa.gov\/work\/HQ\/176334.pdf\" target=\"_blank\" rel=\"nofollow noopener\">https:\/\/semspub.epa.gov\/work\/HQ\/176334.pdf<\/a> <br \/><sup>2<\/sup> (Radionuclides) \u2013 <a href=\"https:\/\/www.epa.gov\/dwreginfo\/radionuclides-rule\" target=\"_blank\" rel=\"nofollow noopener\">https:\/\/www.epa.gov\/dwreginfo\/radionuclides-rule<\/a> <br \/><sup>3<\/sup> (Radionuclides) \u2013 <a href=\"https:\/\/nepis.epa.gov\/Exe\/ZyPDF.cgi?Dockey=30006644.txt\" target=\"_blank\" rel=\"nofollow noopener\">https:\/\/nepis.epa.gov\/Exe\/ZyPDF.cgi?Dockey=30006644.txt<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-f55944f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f55944f\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-bcf867e\" data-id=\"bcf867e\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-565d9c6 elementor-widget elementor-widget-heading\" data-id=\"565d9c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">PRUDENCE: <\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-049cc82 elementor-widget elementor-widget-text-editor\" data-id=\"049cc82\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Les flacons d&#039;\u00e9chantillon contiennent de l&#039;acide nitrique comme conservateur, qui peut facilement br\u00fbler la peau et les v\u00eatements. Veuillez porter des gants lors de la manipulation des flacons, \u00e9viter de les remplir excessivement et pr\u00e9venir les \u00e9claboussures de contenu.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-71a9590\" data-id=\"71a9590\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ad97955 elementor-widget elementor-widget-heading\" data-id=\"ad97955\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Qu&#039;est-ce qu&#039;un isotope ? <\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd27320 elementor-widget elementor-widget-text-editor\" data-id=\"bd27320\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Chacune des deux ou plusieurs esp\u00e8ces d&#039;atomes d&#039;un \u00e9l\u00e9ment chimique ayant le m\u00eame num\u00e9ro atomique et un comportement chimique presque identique, mais une masse atomique ou un nombre de masse diff\u00e9rent et des propri\u00e9t\u00e9s physiques diff\u00e9rentes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-8469239\" data-id=\"8469239\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fafe9d0 elementor-widget elementor-widget-heading\" data-id=\"fafe9d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Qu&#039;est-ce qu&#039;une demi-vie ?<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ae8c05e elementor-widget elementor-widget-text-editor\" data-id=\"ae8c05e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Le temps n\u00e9cessaire pour qu&#039;une substance radioactive perde 50 % de sa radioactivit\u00e9 par d\u00e9sint\u00e9gration est appel\u00e9 demi-vie.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-6df0427 elementor-widget elementor-widget-heading\" data-id=\"6df0427\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">\u00c9tat d&#039;origine<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3715492 elementor-widget elementor-widget-text-editor\" data-id=\"3715492\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Au 03\/12\/2020, nous <strong><span style=\"text-decoration: underline;\">peut<\/span><\/strong> accepter des \u00e9chantillons de\u00a0:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-a78c940 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a78c940\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-a6bfa80\" data-id=\"a6bfa80\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2aec42a tp-shortcode elementor-widget elementor-widget-shortcode\" data-id=\"2aec42a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-102\" class=\"tablepress tablepress-id-102 tp-no-border tp-no-padding tp-font-size-inherit\">\n<tbody>\n<tr class=\"row-1\">\n\t<td class=\"column-1\">Alabama<\/td><td class=\"column-2\">Indiana<\/td><td class=\"column-3\">New York<\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Colorado<\/td><td class=\"column-2\">Louisiane<\/td><td class=\"column-3\">Oklahoma<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Connecticut<\/td><td class=\"column-2\">Maine<\/td><td class=\"column-3\">Pennsylvanie<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Delaware<\/td><td class=\"column-2\">Maryland<\/td><td class=\"column-3\">Rhode Island<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">district f\u00e9d\u00e9ral de Columbia<\/td><td class=\"column-2\">Massachusetts<\/td><td class=\"column-3\">Vermont<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">Floride<\/td><td class=\"column-2\">New Hampshire<\/td><td class=\"column-3\">Virginie<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">G\u00e9orgie<\/td><td class=\"column-2\">New Jersey<\/td><td class=\"column-3\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-102 from cache --><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-0cbf20b elementor-widget elementor-widget-text-editor\" data-id=\"0cbf20b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Au 03\/12\/2020, nous <strong><span style=\"text-decoration: underline;\">ne peut pas<\/span><\/strong> accepter des \u00e9chantillons de\u00a0:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-58a669a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"58a669a\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-8264443\" data-id=\"8264443\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-52fd646 tp-shortcode elementor-widget elementor-widget-shortcode\" data-id=\"52fd646\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-103\" class=\"tablepress tablepress-id-103 tp-no-border tp-no-padding tp-font-size-inherit\">\n<tbody>\n<tr class=\"row-1\">\n\t<td class=\"column-1\">Alaska<\/td><td class=\"column-2\">Minnesota<\/td><td class=\"column-3\">Oregon<\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Arizona<\/td><td class=\"column-2\">Missouri<\/td><td class=\"column-3\">Caroline du Sud<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Arkansas<\/td><td class=\"column-2\">Mississippi<\/td><td class=\"column-3\">Dakota du Sud<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Californie<\/td><td class=\"column-2\">Montana<\/td><td class=\"column-3\">Tennessee<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Hawaii<\/td><td class=\"column-2\">Nebraska<\/td><td class=\"column-3\">Texas<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">Idaho<\/td><td class=\"column-2\">Nevada<\/td><td class=\"column-3\">Utah<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">Illinois<\/td><td class=\"column-2\">New Mexico<\/td><td class=\"column-3\">Washington<\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">Iowa<\/td><td class=\"column-2\">Caroline du Nord<\/td><td class=\"column-3\">Virginie-Occidentale<\/td>\n<\/tr>\n<tr class=\"row-9\">\n\t<td class=\"column-1\">Kansas<\/td><td class=\"column-2\">Dakota du Nord<\/td><td class=\"column-3\">Wisconsin<\/td>\n<\/tr>\n<tr class=\"row-10\">\n\t<td class=\"column-1\">Kentucky<\/td><td class=\"column-2\">Ohio<\/td><td class=\"column-3\">Wyoming<\/td>\n<\/tr>\n<tr class=\"row-11\">\n\t<td class=\"column-1\">Michigan<\/td><td class=\"column-2\"><\/td><td class=\"column-3\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-103 from cache --><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-429ad1e elementor-widget elementor-widget-image\" data-id=\"429ad1e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1440\" height=\"1027\" src=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/state-of-origin.png\" class=\"attachment-full size-full wp-image-7650\" alt=\"\" srcset=\"https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/state-of-origin.png 1440w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/state-of-origin-300x214.png 300w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/state-of-origin-1024x730.png 1024w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/state-of-origin-768x548.png 768w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/state-of-origin-18x12.png 18w, https:\/\/laboratorytesting.com\/wp-content\/uploads\/2026\/08\/state-of-origin-600x428.png 600w\" sizes=\"(max-width: 1440px) 100vw, 1440px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Radiochemistry &#8211; Radium 226 and Radium 228 Radium (Ra) is a naturally occurring radioactive metal that exists as one of several isotopes. It is formed when uranium (U) and thorium (Th) decay in the environment. In the natural environment, radium [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":7385,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"","footnotes":""},"class_list":["post-7661","page","type-page","status-publish","hentry","slug-radium-226-and-radium-228","odd_post_id"],"_links":{"self":[{"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/pages\/7661","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/comments?post=7661"}],"version-history":[{"count":10,"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/pages\/7661\/revisions"}],"predecessor-version":[{"id":7676,"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/pages\/7661\/revisions\/7676"}],"up":[{"embeddable":true,"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/pages\/7385"}],"wp:attachment":[{"href":"https:\/\/laboratorytesting.com\/fr\/wp-json\/wp\/v2\/media?parent=7661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}