Determination of arsenic and antimony by hydride generation atomic absorption spectrometry using a small hydride generator

Hon, Ping-Kay; Lau, Oi-Wah; Tsui, Shu-Ki

doi:10.1039/ja9860100125

Cited by 24 publications

(9 citation statements)

References 3 publications

(3 reference statements)

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“…Moreover, the detection limits of simultaneous determination for arsenic, antimony, and bismuth (three elements), and arsenic, antimony, bismuth, and selenium (four elements) by the same hydride generation high power N 2 -MIP-AES method [32,33] were found to be 7.13, 14.6, and 116, and 7.8, 14.5, 131, and 28.99 ng/ml, respectively. Also, the detection limits of single-element determination by same method [18,34] for bismuth and tellurium were 102 and 15 ng/ml, respectively. The determination of bismuth and tellurium by hydride generation atomic spectrometry is well known to be susceptible to interferences from various diverse elements [26,27,28,29].…”

Section: Analytical Performancementioning

confidence: 99%

“…In other words, the Fe(III) in the sample solutions must be reduced to Fe(II) by an appropriate reductant and/or interference-releasing agent prior to hydride generation. For this purpose, the effects of 0.1-5.0% (w/v) of L-cysteine [18,19,32,35,36,37,38], 0.1-5.0% (w/v) of L-ascorbic acid [17,22,33,34], and 0.05-0.5% (w/v) of thiourea [16,20,23,24,34,37,39,40] were investigated as interference-releasing agents. The results showed that 1.5% of L-ascorbic acid was the most preferable in the prereduction of Fe(III) to Fe(II), as shown in Fig.…”

Section: Determination Of Bismuth and Tellurium In Steelsmentioning

confidence: 99%

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Simultaneous determination of bismuth and tellurium in steels by high power nitrogen microwave induced plasma atomic emission spectrometry coupled with the hydride generation technique

Matsumoto

Shiozaki

Nakahara

2004

Analytical and Bioanalytical Chemistry

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An annular-shaped, high power nitrogen microwave induced plasma (N(2)-MIP) produced at atmospheric pressure by an Okamoto cavity, as a new excitation source for atomic emission spectrometry (AES), has been used for the simultaneous determination of bismuth and tellurium in steels with the hydride generation method. Under the optimized experimental conditions, the best attainable detection limits at the Bi I 195.389 nm and Te I 200.200 nm lines were 110 and 86 ng/ml for bismuth and tellurium, respectively. The linear dynamic ranges for bismuth and tellurium were 300 to 30,000 ng/ml. The presence of several diverse elements was found to cause a more or less depressing interference with the proposed technique. When bismuth and tellurium in steels were determined, a large amount of Fe(III) in the solution caused a severe depressing interference, while the presence of Fe(II) showed little or no significant interference. Of the several interference-releasing agents examined, l-ascorbic acid was found to be the most preferable to reduce Fe(III) to Fe(II) prior to hydride generation. The concentrations of bismuth and tellurium in steels were determined by the proposed technique. The results obtained by this method were in good agreement with their certified values.

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Section: Analytical Performancementioning

confidence: 99%

Section: Determination Of Bismuth and Tellurium In Steelsmentioning

confidence: 99%

Simultaneous determination of bismuth and tellurium in steels by high power nitrogen microwave induced plasma atomic emission spectrometry coupled with the hydride generation technique

Matsumoto

Shiozaki

Nakahara

2004

Analytical and Bioanalytical Chemistry

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“…Em menores temperaturas, o oxigênio, geralmente já presente no sistema como um contaminante, pode não ser suficiente para alcançar a sensibilidade ótima e, então, pode ser necessário um aporte extra deste gás 53 . Existe um efeito marcante do estado da superfície interna do tubo de quartzo na sensibilidade 54 , evidenciado por uma deterioração gradual de sensibilidade e/ou precisão. O desempenho ótimo pode ser mantido pela lavagem periódica do tubo de quartzo com solução de HF 10% v/v, mas o polimento da superfície interna do atomizador com alumínio foi também sugerido 55 .…”

Section: Atomização Em Tubo De Quartzo Aquecido Externamenteunclassified

A geração química de vapor em espectrometria atômica

et al. 2002

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Recebido em 17/9/01; aceito em 29/5/02 CHEMICAL VAPOR GENERATION IN ATOMIC SPECTROMETRY. The historical development of atomic spectrometry techniques based on chemical vapor generation by both batch and flow injection sampling formats is presented. Detection via atomic absorption spectrometry (AAS), microwave induced plasma optical emission spectrometry (MIP-OES), inductively coupled plasma optical emission spectrometry (ICP-OES) , inductively coupled plasma mass spectrometry (ICP-MS) and furnace atomic nonthermal excitation spectrometry (FANES) are considered. Hydride generation is separately considered in contrast to other methods of generation of volatile derivatives. Hg -CVAAS (cold vapor atomic absorption spectrometry) is not considered here. The current state-of-the-art, including extension, advantages and limitations of this approach is discussed.Keywords: chemical vapor generation; atomic spectrometry; batch and flow injection. INTRODUÇÃOO sucesso da espectrometria atômica depende, freqüentemente, do procedimento de introdução da amostra, sendo que o modo mais comum baseia-se na formação de um aerossol líquido, por meio de nebulizadores pneumáticos. Esses dispositivos são de operação simples e conveniente e, por isso mesmo, amplamente utilizados. Entretanto, menos de 10% da solução introduzida é transformada em aerossol útil, sendo sua maior parte, portanto, descartada. Além disso, dificuldades com esses nebulizadores surgem quando são usadas soluções muito viscosas ou com alto teor salino ou, ainda, quando se dispõe tão somente de micro-volumes de amostra 1 .Uma alternativa que se apresenta é a transformação da espécie de interesse em um composto volátil, e seu posterior transporte para a célula de atomização. Quando esta transformação se faz por meio de uma reação química, o processo é conhecido como geração química de vapor. A geração eletroquímica também é citada, embora menos freqüentemente 2-7 . Dois trabalhos podem ser considerados como marcos na geração química de vapor: no primeiro, Hatch e Ott 8 inauguraram a técnica hoje conhecida como "de vapor frio", embora se deva citar os trabalhos anteriores de Poluektov et al. 9,10 Na técnica do vapor frio, o íon mercúrico contido numa solução da amostra é reduzido a mercúrio elementar e assim carreado por uma corrente de gás (ar, N 2 ou Ar), borbulhada através da solução, para a célula de absorção; ou seja, o vapor formado pela reação já é o próprio vapor atômico. O segundo marco na geração de vapor é o trabalho de Holak 11 , onde o arsênio foi reduzido a arsina pela adição, à amostra ácida, de Zn metá-lico, e esta transportada para a chama de um aparelho de absorção atômica. O ganho em sensibilidade observado resulta da maior eficiência de transporte do analito, em comparação com a nebulização pneumática, uma vez que toda a arsina formada pode, em princípio, alcançar o atomizador, carreada por um fluxo de argônio ou nitrogênio e também pelo próprio gás hidrogênio gerado na reação. Entretanto, a atomização do arsênio usando chama convencional apresenta ...

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“…AAS hydride generation is the most widely used for low concentrations [13][14][15] the reference materials ASe and SRM 1633a were mixed and homogenised with sand in the same proportion as the sorbents are used in some retention experiments [6], and the mixture was ground before dissolution and analysis. The coal and the activated carbons were just ground.…”

Section: Introductionmentioning

confidence: 99%

04/02126 Determination of selenium by ICP-MS and HG-ICP-MS in coal, fly ashes and sorbents used for flue gas cleaning

2004

Fuel and Energy Abstracts

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Selenium is an element of environmental concern which content in coal is generally lower than 2 mg g -1 . During coal utilization for power generation this element may be emitted in gas phase or condensed in the particulate matter. To avoid the problems originated by such emissions different systems are being developed to retain selenium compounds in the system using solid sorbents. In this work, the determination of selenium in a variety of solid materials related with the use of coal for energy production was evaluated by two methods; ICP-MS and HG-ICP-MS. Coals, fly ashes and various solids used as sorbents in gas cleaning processes (kaolin, limestone, alumina, metal oxide mixtures and activated carbons), were the materials analyzed. In some of these materials, selenium can be determined with similar results by either method. However in coal, fly ashes and some activated carbons, the use of a HG-ICP-MS is necessary to avoid interferences. The results obtained by both methods in samples whose selenium content ranges from μg g -1 to mg g -1 , are discussed. In general, good (± 2-4%) to excellent (± 1-2%) agreement between the reference and the obtained concentrations was achieved in the analysis of certified and reference samples. The 2 precision of the analysis, including instrumental, sample preparation and sample homogeneity uncertainties was evaluated, the relative standard deviation (RSD) being lower than 10% in all cases.

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Determination of arsenic and antimony by hydride generation atomic absorption spectrometry using a small hydride generator

Cited by 24 publications

References 3 publications

Simultaneous determination of bismuth and tellurium in steels by high power nitrogen microwave induced plasma atomic emission spectrometry coupled with the hydride generation technique

Simultaneous determination of bismuth and tellurium in steels by high power nitrogen microwave induced plasma atomic emission spectrometry coupled with the hydride generation technique

A geração química de vapor em espectrometria atômica

04/02126 Determination of selenium by ICP-MS and HG-ICP-MS in coal, fly ashes and sorbents used for flue gas cleaning

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