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A robust method for trace element determination in food samples by addition of methane to the plasma of a dynamic reaction cell mass spectrometer (CH 4 mixed plasma-DRC-MS) was developed. Addition of 3mLmin −1 methane to Ar-plasma eliminates the signal suppressions of various elements (As, Se, Hg, etc.) due to the high concentration of nitric acid (10%, v/v). The CH 4 –Ar mixed...
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