[Determination of mercury in shark liver by cold atom fluorescence spectrometry after microwave dissolution].
The conditions for the determination of mercury in shark liver by cold atom fluorescence spectrometry (CAFS) with microwave dissolution were studied. After being dried completely, the method employed 2 mol x L(-1) HNO3-4 mol x L(-1) HCl as an oxidant, and with catalysis by V2O5, the samples were digested in a microwave oven. The mercury in absorption solution was reduced by SnCl2, and then was determined by CAFS at wavelength of 253.7 nm. 10% SnCl2 solution was used as a reductive agent for mercury. The linear range was 0-2.0 ng x mL(-1) mercury (r = 0.999 7). The detection limit was 0.05 ng x mL(-1), the relative standard deviation was 0.86%-2.22%, and the average recovery rate was 96.0%-108.5%. The method was suitable for the determination of mercury in shark liver.
School of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China.
Di
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Weng
D000818:Animals; D003080:Cold Temperature; D008099:Liver / Q000737:chemistry* / Q000378:metabolism; D008628:Mercury / Q000032:analysis*; D008872:Microwaves; D012754:Sharks / Q000378:metabolism*; D012996:Solutions; D013050:Spectrometry, Fluorescence / Q000379:methods*
D012996:Solutions; D008628:Mercury