{"id":5201,"date":"2026-09-10T16:20:53","date_gmt":"2026-09-10T08:20:53","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=5201"},"modified":"2026-09-10T16:20:53","modified_gmt":"2026-09-10T08:20:53","slug":"determination-of-lead-in-graphite-powder-graphite-furnace-atomic-absorption-spectrometry-2","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/pt\/applications\/determination-of-lead-in-graphite-powder-graphite-furnace-atomic-absorption-spectrometry-2","title":{"rendered":"Determina\u00e7\u00e3o do chumbo em p\u00f3 de grafito"},"content":{"rendered":"<p>1 Resumo do M\u00e9todo<\/p>\n<p>Ap\u00f3s a digest\u00e3o por micro-ondas, a solu\u00e7\u00e3o da amostra \u00e9 injetada no forno de grafite do espectrofot\u00f4metro de absor\u00e7\u00e3o at\u00f4mica. Ap\u00f3s a atomiza\u00e7\u00e3o eletrot\u00e9rmica, ela absorve a linha de resson\u00e2ncia em 283,3 nm. Dentro de uma determinada faixa de concentra\u00e7\u00e3o, a absorb\u00e2ncia \u00e9 proporcional ao teor de chumbo, e a quantifica\u00e7\u00e3o \u00e9 realizada por compara\u00e7\u00e3o com uma s\u00e9rie de padr\u00f5es.<\/p>\n<p>2. \u00c2mbito de aplica\u00e7\u00e3o<\/p>\n<p>Este m\u00e9todo \u00e9 aplic\u00e1vel \u00e0 determina\u00e7\u00e3o de chumbo em p\u00f3 de grafite.<\/p>\n<p>3 Base de Refer\u00eancia<\/p>\n<p>GB\/T 24533-2009<\/p>\n<p>4 Instrumentos e Reagentes<\/p>\n<p>4.1 Instrumentos e equipamento<\/p>\n<p>4.1.1 Instrumentos de teste<\/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>Espetrofotometro de Absor\u00e7\u00e3o At\u00f4mica do Furno de Graf\u00edto<\/td>\n<td>1 conjunto<\/td>\n<td>\u2014<\/td>\n<td>L\u00e2mpada de c\u00e1todo oco de chumbo<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Arg\u00f4nio<\/td>\n<td>1 cilindro<\/td>\n<td>Pureza \u226599,99%<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Sistema de \u00e1gua refrigerante circulante<\/td>\n<td>1 conjunto<\/td>\n<td>Vaz\u00e3o nominal da bomba: 3,5 L\/min<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>1 Method Overview After microwave digestion, the sample solution is injected into the graphite furnace of the atomic absorption spectrophotometer. Following electrothermal atomization, it absorbs the resonance line at 283.3 nm. Within a certain concentration range, the absorbance is proportional to the lead content, and quantification is performed by comparison with the standard series. 2 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":5062,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[81,36],"tags":[],"class_list":["post-5201","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-petrochemical-and-chemical","category-applications"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/5201","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=5201"}],"version-history":[{"count":1,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/5201\/revisions"}],"predecessor-version":[{"id":5202,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/5201\/revisions\/5202"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/media\/5062"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/media?parent=5201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/categories?post=5201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/tags?post=5201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}