乳粉中三聚氰胺标准物质的制备

Preparation of melamine reference material in milk powder

中文关键词:  三聚氰胺  标准物质  乳粉  制备方法

英文关键词:melamine  reference material  milk powder  preparation

中文摘要:

      目的 制备乳粉中的三聚氰胺标准物质。方法 将三聚氰胺标准溶液与乳粉复溶液通过均质、冷冻干燥、粉碎、过筛、混合等步骤制得标准物质, 经均匀性与稳定性研究, 由8家实验室进行协同定值, 并进行不确定度评估。结果 制得的标准物质的特性值为(5.19±0.37) mg/kg, 均匀性良好, 稳定性大于12个月。 结论 通过该方法制得的标准物质, 均匀性与稳定性良好。可用于检测方法的开发、检测过程的质量控制、实验室能力验证、实验室间比对等领域。

英文摘要:

      Objective To prepare the melamine reference material in milk powder. Methods The standard material was prepared by homogenizing, freeze-drying, pulverizing, sieving, mixing and other steps of the melamine standard solution and the milk powder complex solution. After homogeneity and stability studies, coordinated values were determined by 8 laboratories, and the uncertainty was evaluated. Results The characteristic value of the reference material was (5.19±0.37) mg/kg, the homogeneity was good and the stability was more than 12 months. Conclusion The reference material prepared by this method has good uniformity and stability, which can be used in the development of testing methods, quality control of testing processes, laboratory proficiency testing, inter-laboratory comparison, etc.