Seafood digestion by microwave-induced combustion for total arsenic determination by atomic spectrometry techniques with hydride generation
- 2 December 2008
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 24 (2), 224-227
- https://doi.org/10.1039/b810952d
Abstract
A microwave-induced combustion (MIC) method was proposed for seafood digestion and further total arsenic determination using hydride generation coupled to atomic spectrometry techniques. It was possible to digest up to 500 mg of mussel tissue, fish tissue and whole shrimp. Combustion was carried out in closed quartz vessels with pressurized oxygen. Total arsenic was determined in MIC digests by conventional inductively coupled plasma mass spectrometry (ICP-MS), flow injection hydride generation coupled to atomic absorption spectrometry (FI-HG AAS) and to ICP-MS (FI-HG-ICP-MS). Accuracy was evaluated using certified reference materials of oyster tissue, dogfish muscle, tuna fish tissue and mussel tissue. The use of a reflux step and water or diluted HNO3 as absorbing solutions was investigated. The agreement to certified values was from 96 to 103% using 0.1 mol l−1 HNO3 as absorbing solution and 5 min of reflux. The agreement of results for As determination by FI-HG AAS and FI-HG-ICP-MS was better than 98% when compared with results obtained by ICP-MS after digestion. The proposed method by MIC allowed the digestion in less time than other procedures and with low residual carbon content (< 0.5%). With this method up to eight samples could be processed simultaneously in 25 min. Taking into account that concentrated acids were not necessary, the proposed method can be considered in agreement with green chemistry recommendations.Keywords
This publication has 26 references indexed in Scilit:
- Determination of Halogens in Coal after Digestion Using the Microwave-Induced Combustion TechniqueAnalytical Chemistry, 2008
- Determination of Arsenic in Algae – Results of an Interlaboratory Trial: Determination of Arsenic Species in the Water-Soluble FractionMicrochimica Acta, 2005
- Underestimation of the total arsenic concentration by hydride generation techniques as a consequence of the incomplete mineralization of arsenobetaine in acid digestion proceduresAnalytica Chimica Acta, 2001
- Speciation of arsenobetaine in marine organisms using a selective leaching/digestion procedure and hydride generation atomic absorption spectrometryAnalytica Chimica Acta, 1997
- Arsenic speciation in biological samples by on-line high performance liquid chromatography-microwave digestionhydride generation-atomic absorption spectrometryAnalytica Chimica Acta, 1996
- UV-photooxidation as pretreatment step in inorganic analysis of environmental samplesAnalytica Chimica Acta, 1996
- Microwave digestion for the determination of arsenic, cadmium and lead in seafood products by inductively coupled plasma atomic emission and mass spectrometryThe Analyst, 1994
- Arsenic speciation in seafood samples with emphasis on minor constituents: an investigation using high-performance liquid chromatography with detection by inductively coupled plasma mass spectrometryJournal of Analytical Atomic Spectrometry, 1993
- Arsenic speciation in the environmentChemical Reviews, 1989
- Selective reduction of arsenic species by continuous hydride generation. Part I. Reaction mediaThe Analyst, 1986