Objective To evaluate the uncertainty for the determination of 4-chlorophenoxyacetic acid in bean sprouts by liquid chromatography- high resolution mass spectrometry. Methods According to SN/T 3725-2013 Determination of 4-chlorophenoxyacetic acid residues in food for export, content of 4-chlorophenoxyacetic acid in bean sprouts was detected. According to JJF 1059.1-2012 Evaluation and expression of measurement uncertainty, a mathematical model for the evaluation of the uncertainty of 4-chlorophenoxyacetic acid in bean sprouts by high-resolution liquid chromatography-mass spectrometry was established, the sources of each uncertainty component was analyzed and quantified, and 4-chlorophenoxy in bean sprouts uncertainty in the determination of acetic acid content was synthesized. Results When the content of 4-chlorophenoxyacetic acid in bean sprout was 35.11 μg/kg, the expanded uncertainty was 4.28 μg/kg (k=2) under 95% confidence interval. Conclusion The preparation of standard solution is the main source of uncertainty in experimental process.
标题：液相色谱-高分辨质谱法测定豆芽中4-氯苯氧乙酸的不确定度评估
英文标题：Uncertainty evaluation for determination of 4-chlorophenoxyacetic acid in bean sprouts by liquid chromatography- high resolution mass spectrometry
作者：
郭立净 河南省口岸食品检验检测所
王赛楠 河南省口岸食品检验检测所
中文关键词:液相色谱串联高分辨质谱法,豆芽,4-氯苯氧乙酸,不确定度,
英文关键词:liquid chromatography- high resolution mass spectrometry,bean sprouts,4-chlorophenoxyacetic acid,uncertainty,
