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  • Title: Development of a mushroom powder Certified Reference Material for calcium, arsenic, cadmium and lead measurements.
    Author: Chew G, Sim LP, Ng SY, Ding Y, Shin RYC, Lee TK.
    Journal: Food Chem; 2016 Jan 01; 190():293-299. PubMed ID: 26212973.
    Abstract:
    Isotope dilution mass spectrometry and standard addition techniques were developed for the analysis of four elements (Ca, As, Cd and Pb) in a mushroom powder material. Results from the validated methods were compared to those of other national metrology institutes in the CCQM-K89 intercomparisons and the results were in excellent agreement with the reference values. The same methods were then used for the assignment of reference values to a mushroom powder Certified Reference Material (CRM). The certified values obtained for Ca, As, Cd and Pb were 1.444 ± 0.099 mg/g, 5.61 ± 0.59 mg/kg, 1.191 ± 0.079 mg/kg and 5.23 ± 0.94 mg/kg, respectively. The expanded measurement uncertainties were obtained by combining the uncertainty contributions from characterization (uchar) and between-bottle homogeneity (ubb).
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