摘要
根据测量不确定度评定与表示理论,对电位滴定法测定食用植物油的过氧化值进行不确定度评定,对影响测量过程的不确定度来源进行了分析。结果表明,该方法测定食用植物油中过氧化值的扩展不确定度为U_X=0.004g/100 g,提出通过精确配制标准溶液及多次重复测量的方法能够降低该分析方法的不确定度。
The uncertainty of peroxide value of edible oils by automatic potentiometric titration was evaluated and the source of uncertainty affecting the measurement process was analysed based on the theory of evaluation and expression of uncertainty in measurement. Results showed that the uncertainty of expanded uncertainty of peroxide value in edible oils was Ux=0.004 g/100g and proposed that prepared standard solutions accurately and measured repeatedly can reduce the uncertainty of the method.
出处
《食品研究与开发》
CAS
北大核心
2013年第5期96-99,共4页
Food Research and Development
关键词
不确定度
电位滴定法
过氧化值
uncertainty
potentiometric titration
peroxide value
