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The content of Chromium in plastic products is (276±6) mg/kg, which is determinated by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) using Microwave digestion. A mathematical model of the uncertainty containing variables such as regression equation, constant volume , weighing weight and so on is established.

Uncertainty Evaluation in Determination of Chromium by Inductively Coupled Plasma Mass Spectrometry(ICP-MS)