Platform in furnace Zeeman-effect atomic absorption spectrometric determination of arsenic in beer by atomization of slurries of sample ash

Cervera, M. Luisa; Navarro, A.; Montoro, R.; Guárdia, Miguel de la; Salvador, Amparo

doi:10.1039/ja9910600477

Cited by 20 publications

(6 citation statements)

References 5 publications

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“…Zeeman correction has been recommended to compensate for the structured background produced by phosphates during the determination of arsenic [9][10][11][12][13][14] and, consequently, this correction system was selected.…”

Section: Resultsmentioning

confidence: 99%

Slurry atomisation for the determination of arsenic, cadmium and lead in food colourants using electrothermal atomic absorption spectrometry

Viñas

Pardo-Martı́nez

López-Garcı́a

et al. 2001

J. Anal. At. Spectrom.

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Section: Resultsmentioning

confidence: 99%

Slurry atomisation for the determination of arsenic, cadmium and lead in food colourants using electrothermal atomic absorption spectrometry

Viñas

Pardo-Martı́nez

López-Garcı́a

et al. 2001

J. Anal. At. Spectrom.

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“…A temática do melhor tamanho de partícula é um ponto bastante discutido e depende da composição da amostra. Em todo caso, este efeito é mais acentuado nos sistemas de atomização com chama e com plasma em comparação aos sistemas eletrotérmicos 3 , e, provavelmente por essa razão, tem-se dado maior preferência aos sistemas eletrotérmicos na análise direta de suspensões 11,[15][16][17][19][20][21][22][25][26][27][28][29][30][31][32][33][34][35][36][38][39][40][45][46][47][48][49][50]54,75,76 .…”

Section: Tamanho De Partículaunclassified

“…Dentre elas, pode-se citar as mesmas vantagens da técnica de amostragem sólida e ainda, que a curva analítica pode ser obtida, em muitos casos, com o emprego de soluções padrão aquosas do analito 12 . Por isso, a técnica das suspensões tem sido usada com sucesso para a análise de vários materiais, tais como, pigmentos 13,14 , materiais geológicos [15][16][17][18][19][20] e gêneros alimentícios [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] , entre outros [41][42][43][44][45][46][47][48][49][50][51] .…”

Section: Introductionunclassified

Amostragem de suspensões: Emprego da técnica na análise direta de amostras

Magalhães

Arruda²

1998

Quím. Nova

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CP 6154-13.083-970-Campinas-SP Recebido em 22/7/97; aceito em 23/1/98 SLURRY SAMPLING: THE TECHNIQUE EMPLOYMENT IN THE DIRECT SAMPLE ANALYSIS. This review presents some characteristics related to slurry sampling in trace analysis in terms of its advantages, limitations and applications, as well as the latest advance in this area, such as mechanization, chemical modifiers, stabilization agents and others. The reviewed applications include foods, biological and geological materials.

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“…Several countries have specific legislation concerning tolerance limits for As in different kind of foods and, for example, the maximum concentration of As in beers 6 is fixed at 100 mg l 21 by Spanish law, is established at 500 mg l 21 by Ireland and the United Kingdom and tolerated at 200 mg l 21 in Bulgaria, Czech Republic, Slovenia and Hungary. 7 Total As determination in beer samples is commonly carried out by atomic spectrometry, after a previous dry ashing, [9][10][11][12] wet ashing, 8 degassing, 13 or microwave assisted digestion 14 (see Table 1 for details). Flame atomic absorption spectrometry 12 and electrothermal atomic absorption spectrometry 10 provide a reduced sensitivity for As determination.…”

Section: Introductionmentioning

confidence: 99%

Atomic fluorescence determination of total and inorganic arsenic species in beer

Martínez

Morales‐Rubio

Cervera

et al. 2001

J. Anal. At. Spectrom.

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A simple and nearly direct procedure has been developed for the determination of As in beers, based on hydride generation and atomic fluorescence detection. Using 2 mol l 21 HCl with a carrier flow of 6 ml min 21 , 3% m/v NaBH 4 with a flow of 1.3 ml min 21 , a reaction coil of 200 cm and an argon flow of 400 ml min 21 , total arsenic in beer could be determined in samples diluted 1 : 10 with a final concentration of 2 mol l 21 HCl, 1% m/v KI and 0.08% v/v of an antifoam agent. For the estimation of As III and As V concentrations in beer samples, the difference between the analytical sensitivities of the fluorescence signals obtained for As hydride, without and with previous treatment of samples with KI, can be used, based on a simple proportional equations approach. The methodology developed provides a limit of detection of 39 ng l 21 As, a dynamic range between 0 and 1 ng ml 21 , a variation coefficient between 0.1 and 4.9% (1.01-12.89 ng ml 21 As) and recovery values of 95¡2% for As III and 96¡2% for As V . Data found for the direct determination of total As in market samples varied from 1.01 to 12.89 ng ml 21 , being in relatively good agreement with those obtained after a previous sample ashing.

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Platform in furnace Zeeman-effect atomic absorption spectrometric determination of arsenic in beer by atomization of slurries of sample ash

Cited by 20 publications

References 5 publications

Slurry atomisation for the determination of arsenic, cadmium and lead in food colourants using electrothermal atomic absorption spectrometry

Slurry atomisation for the determination of arsenic, cadmium and lead in food colourants using electrothermal atomic absorption spectrometry

Amostragem de suspensões: Emprego da técnica na análise direta de amostras

Atomic fluorescence determination of total and inorganic arsenic species in beer

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