Sample pre-treatment methods for the trace elements determination in seafood products by atomic absorption spectrometry

被引:36
作者
Bermejo-Barrera, P [1 ]
Moreda-Piñeiro, A [1 ]
Bermejo-Barrera, A [1 ]
机构
[1] Univ Santiago de Compostela, Fac Chem, Dept Analyt Chem Nutr & Bromatol, Santiago De Compostela 15782, Spain
关键词
trace elements; atomic absorption spectrometry; seafood products; microwave assisted-acid digestion; slurry sampling; microwave assisted-acid leaching; ultrasound assisted-acid leaching; enzymatic hydrolysis;
D O I
10.1016/S0039-9140(02)00139-X
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Different sample pre-treatments for seafood products have been compared with determine trace elements (As, Cd, Cr, Cu, Fe, Mg, Mn, Ni, Pb, Se and Zn) by flame atomic absorption spectrometry (FAAS) and electrothermal atomic absorption spectrometry (ETAAS). Classic pre-treatments as microwave assisted-acid digestion and the slurry sampling technique were compared with new procedures such as microwave energy or ultrasound energy assisted-acid leaching process and enzymatic hydrolysis methodologies based on the use of pronase E. The methods were applied to DORM-1 and DOLT-1 reference materials with certified contents for the studied elements. The Student-Newman-Keuls (SNK) method was used to compare with element concentration means obtained with each sample pre-treatment and also the certified concentration means in both reference materials. Multivariate techniques such as principal components analysis (PCA) was also applied to comparative purposes. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
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页码:969 / 984
页数:16
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