{"id":4885,"date":"2026-08-13T14:03:10","date_gmt":"2026-08-13T06:03:10","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=4885"},"modified":"2026-08-13T14:03:10","modified_gmt":"2026-08-13T06:03:10","slug":"determination-of-total-selenium-in-sugar-tangerine-hydride-generation-atomic-fluorescence-spectrometry","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/fr\/applications\/determination-of-total-selenium-in-sugar-tangerine-hydride-generation-atomic-fluorescence-spectrometry","title":{"rendered":"# D\u00e9termination du s\u00e9l\u00e9nium total dans la mandarine sucr\u00e9e (spectrom\u00e9trie de fluorescence atomique par g\u00e9n\u00e9ration d'hydrures)"},"content":{"rendered":"<h2>1 Aper\u00e7u de la m\u00e9thode<\/h2>\n<p>L'\u00e9chantillon est dig\u00e9r\u00e9 \u00e0 chaud avec un acide. Dans un milieu d'acide chlorhydrique 6 mol\/L, le s\u00e9l\u00e9nium hexavalent pr\u00e9sent dans l'\u00e9chantillon est r\u00e9duit en s\u00e9l\u00e9nium t\u00e9travalent. Le borohydrure de potassium est utilis\u00e9 comme agent r\u00e9ducteur pour convertir le s\u00e9l\u00e9nium t\u00e9travalent en s\u00e9l\u00e9niure d'hydrog\u00e8ne dans le m\u00eame milieu. Le s\u00e9l\u00e9niure d'hydrog\u00e8ne ainsi form\u00e9 est transport\u00e9 par un gaz vecteur (argon) jusqu'\u00e0 l'atomiseur pour atomisation. Sous irradiation par une lampe \u00e0 cathode creuse au s\u00e9l\u00e9nium, les atomes de s\u00e9l\u00e9nium \u00e0 l'\u00e9tat fondamental sont excit\u00e9s vers des \u00e9tats de haute \u00e9nergie. Une fluorescence \u00e0 une longueur d'onde caract\u00e9ristique est \u00e9mise lorsque les atomes retournent \u00e0 leur \u00e9tat fondamental. L'intensit\u00e9 de fluorescence est proportionnelle \u00e0 la teneur en s\u00e9l\u00e9nium, et la quantification est r\u00e9alis\u00e9e par comparaison avec des solutions \u00e9talons.<\/p>\n<h2>2. Champ d'application<\/h2>\n<p>Cette m\u00e9thode est applicable au dosage du s\u00e9l\u00e9nium dans la mandarine sucr\u00e9e.<\/p>\n<h2>3 Normes de r\u00e9f\u00e9rence<\/h2>\n<p>GB 5009.93-2017 Norme nationale de s\u00e9curit\u00e9 alimentaire \u2013 Dosage du s\u00e9l\u00e9nium dans les aliments, M\u00e9thode 1\u00a0: Spectrom\u00e9trie de fluorescence atomique par g\u00e9n\u00e9ration d\u2019hydrures<\/p>\n<h2>4 Instruments, \u00e9quipements et r\u00e9actifs<\/h2>\n<h3>4.1 Instruments et \u00e9quipements<\/h3>\n<h4>4.1.1 Instruments analytiques<\/h4>\n<p>feuille<\/p>\n<table>\n<thead>\n<tr>\n<th>- Non, non.<\/th>\n<th>Nom<\/th>\n<th>Quantit\u00e9<\/th>\n<th>Exigences techniques<\/th>\n<th>Accessoires<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>Spectrom\u00e8tre de fluorescence atomique<\/td>\n<td>1 ensemble<\/td>\n<td>\u2014<\/td>\n<td>Lampe cathodique creuse au s\u00e9l\u00e9nium<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Bouteille de gaz argon<\/td>\n<td>1 cylindre<\/td>\n<td>Puret\u00e9 \u226599,999%<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>1 Method Overview The sample is digested with acid under heating. In a 6 mol\/L hydrochloric acid medium, hexavalent selenium in the sample is reduced to tetravalent selenium. Potassium borohydride is used as reducing agent to convert tetravalent selenium into hydrogen selenide in hydrochloric acid medium. The generated hydrogen selenide is carried by carrier gas [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4886,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36,73],"tags":[],"class_list":["post-4885","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-applications","category-food-and-drugs"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/posts\/4885","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/comments?post=4885"}],"version-history":[{"count":1,"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/posts\/4885\/revisions"}],"predecessor-version":[{"id":4887,"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/posts\/4885\/revisions\/4887"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/media\/4886"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/media?parent=4885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/categories?post=4885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/fr\/wp-json\/wp\/v2\/tags?post=4885"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}