{"id":3902,"date":"2025-09-04T11:03:47","date_gmt":"2025-09-04T03:03:47","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=3902"},"modified":"2025-09-04T11:03:47","modified_gmt":"2025-09-04T03:03:47","slug":"determination-of-copper-in-graphite-powder-flame-atomic-absorption-spectrometry-2","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/pt\/applications\/determination-of-copper-in-graphite-powder-flame-atomic-absorption-spectrometry-2","title":{"rendered":"Determina\u00e7\u00e3o de cobre em p\u00f3 de grafito (espectrometria de absor\u00e7\u00e3o at\u00f4mica de chama)"},"content":{"rendered":"

1. Vista geral do m\u00e9todo<\/h2>\n
Ap\u00f3s a amostra ser digerida com aqua regia, a determina\u00e7\u00e3o \u00e9 realizada usando uma chama de ar-acetileno a um comprimento de onda de instrumento de 324,7 nm.<\/div>\n
\n

2. Instrumentos e Reagentes<\/h2>\n

2.1 Instrumentos e equipamento<\/h3>\n

2.1.1 Instrumentos de ensaio<\/h4>\n
\n
\n\n\n\n\n\n\n\n
Serie No.<\/th>\nNome<\/th>\nQuantidade<\/th>\nRequisitos T\u00e9cnicos<\/th>\nAcess\u00f3rios<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nEspetrofotometro de Absor\u00e7\u00e3o At\u00f4mica de Flame<\/td>\n1 conjunto<\/td>\n–<\/td>\nCopper Hollow Cathode Lamp<\/td>\n<\/tr>\n
2<\/td>\nGas de acetileno<\/td>\n1 cilindro<\/td>\nPureza \u2265 99,99%<\/td>\n–<\/td>\n<\/tr>\n
3<\/td>\nCompressor de ar<\/td>\n1 conjunto<\/td>\nPress\u00e3o de descarga estimada: 0,3 MPa<\/td>\n–<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2.1.2 Equipamento de pr\u00e9-tratamento de amostras<\/h4>\n
\n
\n\n\n\n\n\n\n\n\n\n\n
Serie No.<\/th>\nNome<\/th>\nQuantidade<\/th>\nRequisitos T\u00e9cnicos<\/th>\nAcess\u00f3rios<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nPlata quente controlada pela temperatura<\/td>\n1 conjunto<\/td>\nTemperatura estimada: Temperatura do quarto ~ 300[UNK]<\/td>\n–<\/td>\n<\/tr>\n
2<\/td>\nBalan\u00e7o electr\u00f3nico<\/td>\n1 conjunto<\/td>\nSensibilidade: 0,1 mg<\/td>\n–<\/td>\n<\/tr>\n
3<\/td>\nSistema de \u00c1gua Ultrapural<\/td>\n1 conjunto<\/td>\n–<\/td>\n–<\/td>\n<\/tr>\n
4<\/td>\nMicropipeta<\/td>\n1 cada<\/td>\nRangos: 20 \u03bcL~200 \u03bcL, 100 \u03bcL~1000 \u03bcL<\/td>\n–<\/td>\n<\/tr>\n
5<\/td>\nFlask Volum\u00e9trico<\/td>\nV\u00e1rios<\/td>\nVolume: 100 ml<\/td>\n–<\/td>\n<\/tr>\n
6<\/td>\nTest Tube<\/td>\nV\u00e1rios<\/td>\nVolume: 25 ml<\/td>\n–<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2.2 Reagentes<\/h3>\n

2.2.1 Reagentes mentais<\/h4>\n
\n
\n\n\n\n\n\n\n
Serie No.<\/th>\nNome<\/th>\nRequisitos T\u00e9cnicos<\/th>\nObserva\u00e7\u00f5es<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n\u00c1cido n\u00edtrico<\/td>\nMOS Grade<\/td>\n–<\/td>\n<\/tr>\n
2<\/td>\n\u00c1cido hidrocl\u00f3rico<\/td>\nReagente garantido (GR)<\/td>\n–<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2.2.2 Reagentes preparados<\/h4>\n
\n
\n\n\n\n\n\n
Serie No.<\/th>\nNome<\/th>\nM\u00e9todo de Prepara\u00e7\u00e3o<\/th>\nObserva\u00e7\u00f5es<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nSolu\u00e7\u00e3o de \u00e1cido n\u00edtrico (1 99)<\/td>\nMedir 10 ml de \u00e1cido n\u00edtrico, adicionar lentamente a 990 ml de \u00e1gua deionizada, e misturar bem.<\/td>\n–<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2.3 Normas de refer\u00eancia<\/h3>\n

2.3.1 Solu\u00e7\u00e3o de a\u00e7\u00f5es<\/h4>\n
\n
\n\n\n\n\n\n
Serie No.<\/th>\nN\u00e3o.<\/th>\nNome<\/th>\nRequisitos T\u00e9cnicos<\/th>\nObserva\u00e7\u00f5es<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n08615 GBW<\/td>\nSolu\u00e7\u00e3o padr\u00e3o de um \u00fanico elemento de cobre<\/td>\nConcentra\u00e7\u00e3o: 1000 \u03bcg\/ml<\/td>\nInstituto Nacional de Metrologia, China<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

3. Calcula\u00e7\u00e3o dos resultados<\/h2>\n
O conte\u00fado de cobre na amostra \u00e9 calculado usando a seguinte f\u00f3rmula:<\/div>\n
\"\"<\/div>\n


<\/p>\n

Onde:<\/div>\n
    \n
  • X<\/span>\u00a0= conte\u00fado de cobre na amostra, unidade: miligramos por kilograma (mg\/kg);<\/li>\n
  • \u03c1= Concentra\u00e7\u00e3o de massa de cobre na solu\u00e7\u00e3o de ensaio da amostra, unidade: micrograma por mililitro (\u03bcg\/ml);<\/li>\n
  • \u03c10<\/span>= Concentra\u00e7\u00e3o de massa de cobre na solu\u00e7\u00e3o em branco, unidade: micrograma por mililitro (\u03bcg\/ml);<\/li>\n
  • f<\/span>\u00a0= Factor de dilui\u00e7\u00e3o da solu\u00e7\u00e3o amostral digerida;<\/li>\n
  • V<\/span>\u00a0= volume total da solu\u00e7\u00e3o amostral digerida, unidade: mililitro (ml);<\/li>\n
  • m<\/span>\u00a0= massa da amostra, unidade: grama (g).<\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"

    1. Method Overview After the sample is digested with aqua regia, the determination is carried out using an air-acetylene flame at an instrument wavelength of 324.7 nm. 2. Instruments and Reagents 2.1 Instruments and Equipment 2.1.1 Testing Instruments Serial No. Name Quantity Technical Requirements Accessories 1 Flame Atomic Absorption Spectrophotometer 1 set – Copper Hollow […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[81,36],"tags":[],"class_list":["post-3902","post","type-post","status-publish","format-standard","hentry","category-petrochemical-and-chemical","category-applications"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/3902","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=3902"}],"version-history":[{"count":0,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/posts\/3902\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/media?parent=3902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/categories?post=3902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/pt\/wp-json\/wp\/v2\/tags?post=3902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}