Optimization of the solubilization, extraction and determination of inorganic arsenic [As(III) + As(V)] in seafood products by acid digestion, solvent extraction and hydride generation atomic absorption spectrometry

Muñoz, Ociel; Vélez, Dinoraz; Montoro, R.

doi:10.1039/a809426h

Cited by 138 publications

(60 citation statements)

References 18 publications

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“…Existem, na literatura, inúmeras aplicações da técnica de geração de hidretos com detecção por espectrometria atômica, em uma ampla variedade de amostras: alimentos (As) [163][164][165][166] ; água (As) 6,[167][168][169][170][171][172] , (Pb) 173 , (Sn) 174 , (Sb) [175][176][177] , (Se) [178][179][180] , (Tl) 181 , (As e Se) 182 , (As, Se e Sb) 183 , (As, Se, Sb e Ge) 184 ; água e solo (Pb) 185 , amostras ambientais (As) 186 , (Cd) 187 , (Sb) 188,189 , (Sn) 190 ; amostras biológicas (Se) 7 , (As e Bi) 191 ; amostras biológicas e ambientais (As) 192 , (Cd) 193 , (As e Se) 194 ; amostras clíni-cas: cabelo (Se) 195 , (Sb) 196 , urina (As) [197][198][199][200][201] , (Bi) 202 , (Se) 203,205 ; bebidas: vinho (Sb) 206 , vinho e cerveja (As) 207<...>…”

Section: Aplicaçõesunclassified

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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Section: Aplicaçõesunclassified

A geração química de vapor em espectrometria atômica

et al. 2002

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“…242 A bioaccessible iAs value close to that certified was obtained: 0.0821 AE 0.0024 mg As kg À1 . Two authors selectively extract the iAs with HCl and subsequent extraction with chloroform of the iAs present in the acid medium, 238,240 based on the method of Muñoz et al 142 The final determination is performed by ICP-MS and results comparable to the certified value were obtained. Although CE-ICP-MS is not usual in iAs determination, Qu et al 218 extract iAs with an enzyme-assisted water-phase MAE and quantify by CEÀICP-MS, reporting a satisfactory iAs value for the NMIJ 7503-a rice material.…”

Section: -247mentioning

confidence: 99%

“…A method based on the determination of total As via dry ashing mineralization and quantification by HG-AAS, together with acidic digestion and chloroform extraction, determines iAs from the back extraction. 142 This method, with measurement using FI-HG-AAS ( Flow Injection-Hydride Generation-Atomic Absorption Spectrometry), is applied by Díaz et al 143 to determine total As and iAs in several algae species, for both human consumption and production of phytocolloids, harvested from different regions of the Chilean coast. Several research groups in Thailand apply a similar analytical method in several studies with different objectives, but all are based on the assessment of total As and iAs in samples collected from different regions of Thailand.…”

Section: Techniques Involving Hydride Generation (Hg) As a Derivatizamentioning

confidence: 99%

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

2016

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Here we review recent developments in analytical proposals for the assessment of inorganic arsenic (iAs) content in food products. Interest in the determination of iAs in products for human consumption such as food commodities, wine, and seaweed among others is fueled by the wide recognition of its toxic effects on humans, even at low concentrations. Currently, the need for robust and reliable analytical methods is recognized by various international safety and health agencies, and by organizations in charge of establishing acceptable tolerance levels of iAs in food. This review summarizes the state of the art of analytical methods while highlighting tools for the assessment of quality assessment of the results, such as the production and evaluation of certified reference materials (CRMs) and the availability of specific proficiency testing (PT) programmes. Because the number of studies dedicated to the subject of this review has increased considerably over recent years, the sources consulted and cited here are limited to those from 2010 to the end of 2015.

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“…The determination of i-As was performed by acid digestion, extraction with solvents and quantification using an atomic absorption spectrophotometer (Varian, SpectrAA-55, Mulgrave, Victoria, Australia) coupled with a hydride generator (Muñoz et al, 1999). Deionized water (4.1 mL) was added to the samples (1 ± 0.001 g) along with 18.4 mL of concentrated HCl.…”

Section: Determination Of Inorganic Arsenic (I-as)mentioning

confidence: 99%

Honey as a bioindicator of arsenic contamination due to volcanic and mining activities in Chile

Bastías-Montes¹,

Jambon²,

Muñoz

et al. 2013

Chilean J. Agric. Res.

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The content of heavy metals in honey is indicative of natural or anthropogenic pollution and has therefore been proposed as a feasible bioindicator for arsenic contamination in different regions of Chile. Total arsenic (t-As) and inorganic As (i-As) concentrations were determined in 227 samples of honey harvested during the years 2007, 2008, and 2009 in the areas of San Pedro de Atacama, Atacama, Chiloé, and Futaleufú, with the last town located 156 km from the Chaitén Volcano (latest eruption in 2008). These analyses were conducted using an atomic absorption spectrophotometer coupled with a hydride generator. In the honey samples, the concentrations of t-As ranged from 2.2 to 171.9 µg kg -1 , and the i-As concentrations ranged from none detected (ND) to 24.6 µg kg -1 , with the area of San Pedro de Atacama having the highest As concentrations. The samples of honey from Futaleufú showed higher As concentrations after the eruption of the Chaitén Volcano in 2008. This study demonstrates that As pollution in honey may originate from both natural and anthropogenic sources. The results indicate that it is appropriate to use honey as a bioindicator of environmental pollution. In addition, the consumption of the honey studied herein does not pose any health hazards to the consumer due to its As content.

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Optimization of the solubilization, extraction and determination of inorganic arsenic [As(III) + As(V)] in seafood products by acid digestion, solvent extraction and hydride generation atomic absorption spectrometry

Cited by 138 publications

References 18 publications

A geração química de vapor em espectrometria atômica

A geração química de vapor em espectrometria atômica

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

Honey as a bioindicator of arsenic contamination due to volcanic and mining activities in Chile

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