Abstract
Microwave dissolution in closed teflon vessels is described for the determination of ng g −1 contents of mercury in biological materials, prior to two-stage gold amalgamation and cold-vapour atomic absorption spectrometry. Six samples can be decomposed simultaneously within 20 min, with a preset heating programme. The detection limit is 0.84 ng g −1 for a 100-mg sample. Results for six certified reference materials agreed with the certified values.
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