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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/38927

Title: Determination of methyl and inorganic mercury in fish using focused microwave digestion following by Cu2+ addition, sodium tetrapropylborate derivation, n-heptane extraction, and gas chromatography-mass spectrometry
Authors: SYR-SONG CHEN
SHIN-SHOU CHOU
DENG-FWU HWANG
Contributors: 國立臺灣海洋大學:食品科學系
Keywords: fish
methylmercury
inorganic mercury
microwave-assisted digestion
ethylation
GC-MS
Date: 2004
Issue Date: 2016-11-16T02:27:42Z
Publisher: Journal of Food and Drug Analysis,
Abstract: ABSTRACT: The analytical procedure for analysis of methyl- and inorganic mercury in fish was developed in this study. It involved microwave-assisted digestion with alkaline solution (tetra methyl ammonium hydroxide), addition of Cu++, aqueous-phase derivatization of mercury species with sodium tetraethylborate, and subsequent extraction with n-heptane. The various mercury derivatives were desorbed in the splitless injection port of a gas chromatograph and subsequently analyzed by electron impact mass spectrometry. Optimum conditions allowed the sample throughout to be controlled by the instrumental analysis time (about 8 min per sample) but not by the sample preparation step. At the irradiation power of 15-30, 45, and 60-75 W, sample heating times were only 3.5, 2.5, and 1.5 min, respectively. The recoveries of mercury species were 92.3–96.1% and 93.6–95.5% for methyl- and inorganic mercury, respectively. The proposed method was finally validated by the analysis of three biological certified reference materials (BCR CRM 464 tuna fish, NRC DORM-2 dogfish muscle, and NRC DOLT-2 dogfish liver).
Relation: 12(2)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/38927
Appears in Collections:[食品科學系] 期刊論文

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