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Determination of Mercury in Candidate Oyster Tissue CRM using Isotope Dilution-inductively Coupled Plasma Mass Spectromety
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Abstract
Isotope dilution-inductively coupled plasma mass spectrometry (ID-ICP/MS) was applied to determine mercury in oyster tissue. Microwave digestion method using HNO3/H2O2/HF media for the dissolution of solid sample was studied. The procedure for accurate determination of total mercury in oyster tissue sample by IDICP/ MS is described. For the method validation, total Hg concentration in standard mussel tissue reference material (NIST SRM 2976) was determined by ID-ICP/MS after addition of 202Hg to CRM followed by acid decomposition of the spiked sample. This method was applied to the determination of Hg in candidate oyster CRM prepared by KRISS (Korea Research Institute of Standards and Science).
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