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ICP-MS Determination of Cadmium in Food with Microwave Assisted Sample Digestion

Yin Zhong

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Abstract

The food sample was treated by microwave assisted digestion with a mixed solution of HNO3 and H2O2,and the content of cadmium in the sample solution was determined by ICP-MS.The MS interference was eliminated by collision/reaction cell technique.Linear relationship between values of emission intensity and mass concentration of cadmium was kept in the range within 40 μg·L-1,with detection limit(3s) of 0.05 μg·kg-1.The proposed method was used in the analysis of 3 CRM′s,including wheat(GBW 08503),rice(GBW 10010) and tea(GBW 10016);the results obtained were in conformity with certified values.

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What this paper is about

The food sample was treated by microwave assisted digestion with a mixed solution of HNO3 and H2O2,and the content of cadmium in the sample solution was determined by ICP-MS.The MS interference was eliminated by collision/reaction cell technique.Linear relationship between values of emission intensity and mass concentration of cadmium was kept in the range within 40 μg·L-1,with detection limit(3s) of 0.05 μg·kg-1.The proposed method was used in the analysis of 3 CRM′s,including wheat(GBW 08503),rice(GBW 10010) and tea(GBW 10016);the results obtained were in conformity with certified values.

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Available abstract

The food sample was treated by microwave assisted digestion with a mixed solution of HNO3 and H2O2,and the content of cadmium in the sample solution was determined by ICP-MS.The MS interference was eliminated by collision/reaction cell technique.Linear relationship between values of emission intensity and mass concentration of cadmium was kept in the range within 40 μg·L-1,with detection limit(3s) of 0.05 μg·kg-1.The proposed method was used in the analysis of 3 CRM′s,including wheat(GBW 08503),rice(GBW 10010) and tea(GBW 10016);the results obtained were in conformity with certified values.

Key concepts: Certified reference materials, Cadmium, Detection limit, Microwave digestion, Chemistry, Analytical Chemistry (journal), Inductively coupled plasma mass spectrometry, Microwave

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