Chemical Metrology Laboratory, Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore.
Chemical Metrology Laboratory, Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore.
Food Chem. 2016 Jan 1;190:293-299. doi: 10.1016/j.foodchem.2015.05.071. Epub 2015 May 18.
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).
同位素稀释质谱法和标准加入技术被开发用于分析蘑菇粉材料中的四种元素（Ca、As、Cd 和 Pb）。经过验证的方法的结果与 CCQM-K89 国际比对中其他国家计量研究院的结果进行了比较，结果与参考值非常吻合。然后，相同的方法被用于为蘑菇粉认证参考物质（CRM）赋值参考值。获得的 Ca、As、Cd 和 Pb 的认证值分别为 1.444 ± 0.099 mg/g、5.61 ± 0.59 mg/kg、1.191 ± 0.079 mg/kg 和 5.23 ± 0.94 mg/kg。扩展的测量不确定度通过将表征（uchar）和瓶间均匀性（ubb）的不确定度贡献组合起来获得。
