Abstract
A method for the determination of methylmercury has been improved by adding several steps to the ordinary process, such as the proteinase digestion of the samples and continuous extraction of the digest with benzene, and by utilizing p-nitrobenzyl chloride as an internal standard in gas chromatographic analysis. The method thus modified eliminated the emulsion formation, one of the most serious troubles in ordinary method, throughout the whole procedure. The new method revealed 93% of average recovery and less than 1.7% of deviation. The improved procedure was used to estimate the ratio of methylated mercury to total mercury in tuna fish and the results are presented.
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