Methylmercury levels in predatory fish species marketed in Canada

被引：54

作者：

Forsyth, DS ^{[1
]}

Casey, V ^{[1
]}

Dabeka, RW ^{[1
]}

McKenzie, A ^{[1
]}

机构：

[1] Hlth Canada, Hlth Prod & Food Branch, Food Directorate, Bur Chem Safety,Food Res Div, Ottawa, ON K1A 0L2, Canada

来源：

FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT | 2004年 / 21卷 / 09期

关键词：

total mercury; methylmercury; gas chromatography; pulsed discharge detector; predatory fish; enzyme hydrolysis;

D O I：

10.1080/02652030400004259

中图分类号：

O69 [应用化学];

学科分类号：

081704 [应用化学];

摘要：

Mercury was detected in all analysed samples of swordfish, marlin, shark and tuna purchased from major supermarket outlets and fish retailers in three cities across Canada. Total mercury and methylmercury levels ranged up to 3845 and 2346 ng g(-1) respectively. Swordfish contained the highest levels, followed by shark, fresh/frozen tuna and marlin. Levels in canned tuna were considerably less than the other examined samples. Methylmercury was extracted with toluene from enzymatically hydrolysed samples after the addition of sulphuric acid and potassium bromide. An L-cysteine back-extraction was used to separate the methylmercury from most organic co-extractives. Analysis of methylmercury (as methylmercury bromide) was by gas chromatography with pulsed discharge detection.

引用

页码：849 / 856

页数：8

共 30 条

[1]

Evaluation of some isolation methods for organomercury determination in soil and fish samples by capillary gas chromatography - Atomic fluorescence spectrometry [J].