{"id":13982,"date":"2023-01-10T08:49:33","date_gmt":"2023-01-10T07:49:33","guid":{"rendered":"https:\/\/www.cerege.fr\/?page_id=13982"},"modified":"2023-01-12T10:10:44","modified_gmt":"2023-01-12T09:10:44","slug":"polar-ice-geochemistry-tools","status":"publish","type":"page","link":"https:\/\/www.cerege.fr\/en\/equipements\/poles-techniques\/geochimie-organique-inorganique-et-isotopique-2\/unite-de-geochimie-des-glaces-polaires\/outils-de-lunite-de-geochimie-des-glaces-polaires\/","title":{"rendered":"Tools of the polar ice geochemistry unit"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"13982\" class=\"elementor elementor-13982\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6bc3a88c elementor-section-full_width elementor-section-height-min-height elementor-section-height-default elementor-section-items-middle\" data-id=\"6bc3a88c\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\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-f2a047e\" data-id=\"f2a047e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5b9c9184 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5b9c9184\" data-element_type=\"section\" data-e-type=\"section\">\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 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<\/script>\n<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4c48d3e9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4c48d3e9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-extended\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-7f43073c\" data-id=\"7f43073c\" 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-616ba92c elementor-widget elementor-widget-image\" data-id=\"616ba92c\" 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=\"400\" height=\"250\" src=\"https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/ChambreFroide.png\" class=\"attachment-large size-large wp-image-15245\" alt=\"\" srcset=\"https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/ChambreFroide.png 400w, https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/ChambreFroide-300x188.png 300w, https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/ChambreFroide-18x12.png 18w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/>\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-1604a73 elementor-widget elementor-widget-image\" data-id=\"1604a73\" 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=\"400\" height=\"250\" src=\"https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/Pastillage.png\" class=\"attachment-large size-large wp-image-15248\" alt=\"\" srcset=\"https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/Pastillage.png 400w, https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/Pastillage-300x188.png 300w, https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/Pastillage-18x12.png 18w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/>\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-52a32bb elementor-widget elementor-widget-image\" data-id=\"52a32bb\" 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=\"400\" height=\"250\" src=\"https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/LaboGlacio_2.png\" class=\"attachment-large size-large wp-image-15246\" alt=\"\" srcset=\"https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/LaboGlacio_2.png 400w, https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/LaboGlacio_2-300x188.png 300w, https:\/\/www.cerege.fr\/wp-content\/uploads\/2023\/01\/LaboGlacio_2-18x12.png 18w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/>\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<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-54c4eb3e\" data-id=\"54c4eb3e\" 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-1176fa6c elementor-widget elementor-widget-heading\" data-id=\"1176fa6c\" 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\">Laboratoire de pr\u00e9paration<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-310a2db0 elementor-widget elementor-widget-text-editor\" data-id=\"310a2db0\" 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\u2019ensemble des \u00e9chantillons de glace du CEREGE est stock\u00e9 dans un entrep\u00f4t frigorifique \u00e0 proximit\u00e9 du laboratoire. Les \u00e9chantillons n\u00e9cessaires lors d\u2019une campagne de pr\u00e9paration chimique sont rapatri\u00e9s depuis l\u2019entrep\u00f4t frigorifique vers la chambre froide de 6 m2, en temp\u00e9rature n\u00e9gative, install\u00e9e \u00e0 l\u2019int\u00e9rieur du laboratoire de glaciologie. Ensuite, les \u00e9chantillons de glace sont d\u00e9coup\u00e9s dans la chambre froide \u00e0 l\u2019aide d\u2019une scie, puis ils sont mis \u00e0 fondre \u00e0 temp\u00e9rature ambiante dans le laboratoire. <br \/><br \/>La pr\u00e9paration chimique consiste \u00e0 extraire tout le b\u00e9ryllium-10 (10Be) ou le chlore-36 (36Cl) pr\u00e9sents dans les \u00e9chantillons. Pour cela, on ajoute pr\u00e9cis\u00e9ment, une masse connue des isotopes stables du b\u00e9ryllium- 9 ou du chlore-35, l\u2019objectif est double puisque cela permet d\u2019entra\u00eener le 10Be et le 36Cl pr\u00e9sents dans l\u2019\u00e9chantillon mais \u00e9galement de fixer les rapports isotopiques 10Be\/9Be et 36Cl\/35Cl. Nous utilisons le principe de la dilution isotopique pour calculer la concentration de chlorure de l\u2019\u00e9chantillon qui est n\u00e9cessaire pour interpr\u00e9ter de mani\u00e8re optimale les donn\u00e9es de 36Cl (Braucher et al., 2018, Pivot et al., 2019). L\u2019extraction du 10Be et du 36Cl se fait gr\u00e2ce \u00e0 une succession de r\u00e9actions acido-basiques, et d\u2019une pyrolyse dans le cas du 10Be, pour obtenir des compos\u00e9s sous forme solide, l\u2019oxyde de b\u00e9ryllium (BeO) et le chlorure d\u2019argent (AgCl). <br \/><br \/>Ces solides sont ensuite pastill\u00e9s dans une cible qui est plac\u00e9e dans l\u2019une des deux sources (El\u00e9ment 3 de l\u2019Equipex ASTER-CEREGE) du Spectrom\u00e8tre de Masse par Acc\u00e9l\u00e9rateur, ASTER, l\u2019instrument national install\u00e9 au CEREGE.<\/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>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Laboratoire de pr\u00e9paration L\u2019ensemble des \u00e9chantillons de glace du CEREGE est stock\u00e9 dans un entrep\u00f4t frigorifique \u00e0 proximit\u00e9 du laboratoire. Les \u00e9chantillons n\u00e9cessaires lors d\u2019une campagne de pr\u00e9paration chimique sont [&hellip;]<\/p>\n","protected":false},"author":551,"featured_media":13888,"parent":13976,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-13982","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"publishpress_future_action":{"enabled":false,"date":"2026-05-02 11:56:18","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/pages\/13982","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/users\/551"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/comments?post=13982"}],"version-history":[{"count":5,"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/pages\/13982\/revisions"}],"predecessor-version":[{"id":15268,"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/pages\/13982\/revisions\/15268"}],"up":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/pages\/13976"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/media\/13888"}],"wp:attachment":[{"href":"https:\/\/www.cerege.fr\/en\/wp-json\/wp\/v2\/media?parent=13982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}