Evaluation of Uncertainty in the Determination of Lead in Degradable Meal Boxes by Inductively Coupled Plasma Mass Spectrometry
This article determines the lead content in biodegradable food boxes,explores the main reasons that affect the measurement uncertainty of lead detection results in biodegradable food boxes,and specific methods to reduce uncertainty.The results showed that the lead content in plant-based biodegradable food boxes was 0.75 mg·kg-1,with an expanded uncertainty of 0.03 mg·kg-1.The measurement result was expressed as(0.75±0.03)mg·kg-1,k=2.The main factor affecting the reliability of measurement results is the uncertainty introduced by the fitting curve,followed by the uncertainty introduced during sample repeatability measurement,standard series solution preparation,sample weighing,and digestion process.The uncertainty introduced by the constant volume of sample digestion solution can be ignored.
degradable packing meal boxeleadinductively coupled plasma mass spectrometryuncertainty
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