气相色谱内标法测定白酒中乙酸乙酯含量的不确定度评定
Evaluation of Uncertainty in the Determination of Ethyl Acetate in Baijiu by Internal Standard Gas Chromatography
侯雅敏 1李文玲1
作者信息
- 1. 山西省检验检测中心(山西省标准计量技术研究院),山西太原 030012
- 折叠
摘要
采用气相色谱内标法测定白酒中乙酸乙酯含量,通过考察测定过程中的影响因素,分析不确定度来源,评定各个不确定度分量.结果表明,标准溶液配制、样液移取定容体积及标准曲线拟合引入的不确定度对合成测量不确定度的贡献较大.当清香型白酒中乙酸乙酯含量为0.89 g·L-1 时,扩展不确定度为0.05 g·L-1(k=2).
Abstract
The internal standard method of gas chromatography was used to determine the content of ethyl acetate in Baijiu.Through investigating the influencing factors in the determination process,the source of uncertainty was analyzed,and each uncertainty component was evaluated.The results showed that the uncertainty introduced by standard solution preparation,constant volume of sample solution transfer and standard curve fitting contributed greatly to the uncertainty of synthetic measurement.When the content of ethyl acetate in light flavor Baijiu is 0.89 g·L-1,the expanded uncertainty is 0.05 g·L-1(k=2).
关键词
气相色谱内标法/白酒/乙酸乙酯/不确定度Key words
gas chromatography internal standard method/Baijiu/ethyl acetate/uncertainty引用本文复制引用
出版年
2024
NETL
NSTL
万方数据