{"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\/pt\/applications\/determination-of-total-selenium-in-sugar-tangerine-hydride-generation-atomic-fluorescence-spectrometry","title":{"rendered":"# Determina\u00e7\u00e3o do Sel\u00eanio Total em Tangerina (Espectrometria de Fluoresc\u00eancia At\u00f4mica com Gera\u00e7\u00e3o de Hidretos)"},"content":{"rendered":"<h2>1 Resumo do M\u00e9todo<\/h2>\n<p>A amostra \u00e9 digerida com \u00e1cido sob aquecimento. Em meio de \u00e1cido clor\u00eddrico 6 mol\/L, o sel\u00eanio hexavalente presente na amostra \u00e9 reduzido a sel\u00eanio tetravalente. O borohidreto de pot\u00e1ssio \u00e9 utilizado como agente redutor para converter o sel\u00eanio tetravalente em seleneto de hidrog\u00eanio em meio de \u00e1cido clor\u00eddrico. O seleneto de hidrog\u00eanio gerado \u00e9 transportado por um g\u00e1s de arraste (arg\u00f4nio) at\u00e9 o atomizador para atomiza\u00e7\u00e3o. Irradiados por uma l\u00e2mpada de c\u00e1todo oco de sel\u00eanio, os \u00e1tomos de sel\u00eanio no estado fundamental s\u00e3o excitados para estados de alta energia. A fluoresc\u00eancia com comprimento de onda caracter\u00edstico \u00e9 emitida quando os \u00e1tomos retornam ao estado fundamental. A intensidade da fluoresc\u00eancia \u00e9 proporcional ao teor de sel\u00eanio, e a quantifica\u00e7\u00e3o \u00e9 realizada por compara\u00e7\u00e3o com solu\u00e7\u00f5es padr\u00e3o.<\/p>\n<h2>2. \u00c2mbito de aplica\u00e7\u00e3o<\/h2>\n<p>Este m\u00e9todo \u00e9 aplic\u00e1vel \u00e0 determina\u00e7\u00e3o de sel\u00eanio em tangerina.<\/p>\n<h2>3 Padr\u00f5es de Refer\u00eancia<\/h2>\n<p>GB 5009.93-2017 Norma Nacional de Seguran\u00e7a Alimentar \u2013 Determina\u00e7\u00e3o de Sel\u00eanio em Alimentos, M\u00e9todo 1: Espectrometria de Fluoresc\u00eancia At\u00f4mica com Gera\u00e7\u00e3o de Hidreto<\/p>\n<h2>4. Instrumentos, Equipamentos e Reagentes<\/h2>\n<h3>4.1 Instrumentos e equipamento<\/h3>\n<h4>4.1.1 Instrumentos Anal\u00edticos<\/h4>\n<p>folha<\/p>\n<table>\n<thead>\n<tr>\n<th>N\u00e3o.<\/th>\n<th>Nome<\/th>\n<th>Quantidade<\/th>\n<th>Requisitos t\u00e9cnicos<\/th>\n<th>Acess\u00f3rios<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>Espectr\u00f4metro de fluoresc\u00eancia at\u00f4mica<\/td>\n<td>1 conjunto<\/td>\n<td>\u2014<\/td>\n<td>Lampa de Cat\u00f3dio Hollow de Selenio<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Cilindro de g\u00e1s arg\u00f4nio<\/td>\n<td>1 cilindro<\/td>\n<td>Pureza \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\/pt\/wp-json\/wp\/v2\/posts\/4885","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/comments?post=4885"}],"version-history":[{"count":1,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/4885\/revisions"}],"predecessor-version":[{"id":4887,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/4885\/revisions\/4887"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/media\/4886"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/media?parent=4885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/categories?post=4885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/tags?post=4885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}