摘要
研制以乳粉为基体的钙成分分析标准物质。采用火焰原子吸收光谱法对研制的标准物质分别进行均匀性、稳定性检测和评估。该标准物质成分经6家权威实验室联合定值,并对其定值不确定度进行了评定。标准物质定值结果为(3.20±0.35)mg/g(k=2),6个月内稳定性可靠。该标准物质具有良好的均匀性和稳定性,可用于乳粉中钙含量的方法确认和质量控制,符合标准物质的技术要求。
A reference material for calcium analysis based on milk powder was developed.Flame atomic absorption spectrometry was used to detect and evaluate the homogeneity and stability of the developed reference materials.The certified reference material was determined by 6 authoritative laboratories,and the uncertainty was evaluated.The results of the standard substance was(3.20±0.35)mg/g(k=2),and the stability was reliable for 6 months.The certified reference material has good uniformity and stability,and it can be used for method confirmation and quality control of calcium content in milk powder,which meets the technical requirements of certified reference material.
作者
曹玉兰
周剑
魏敏
柴艳兵
李兴佳
安巧云
张耀广
Cao Yulan;Zhou Jian;Wei Min;Chai Yanbing;Li Xingjia;An Qiaoyun;Zhang Yaoguang(Junlebao Dairy Group,Shijiazhuang Key Laboratory of Dairy Quality and Safety Control,Ministry of Agriculture and Villages,Shijiazhuang 050021,China;Key Laboratory of Agrifood Safety and Quality,Ministry of Agriculture and Rural Affairs,Institute of Quality Standard and Testing Technology for Agro-Products of CAAS,Beijing 100081,China)
出处
《化学分析计量》
CAS
2021年第5期1-4,共4页
Chemical Analysis And Meterage
基金
国家重点研发计划项目(SQ2018YFC1604302)。
关键词
乳粉
钙
标准物质
火焰原子吸收光谱法
定值
不确定度
milk powder
calcium
reference material
flame atomic absorption spectrometry
definite value
uncertainty
