高效液相色谱-串联质谱法测定玉米中噻虫嗪含量的不确定度评定
Evaluation of uncertainty in the determination of thiamethoxam content in corn by highperformance liquid chromatography-tandem mass spectrometry
程树维 1董乾仕 1陈晨1
作者信息
- 1. 大连华正检验有限公司,大连 116001;国贸食品科学研究院有限公司,北京 102209;营养健康与食品安全北京市重点实验室,中粮营养健康研究院有限公司,北京 102209
- 折叠
摘要
目的 评定高效液相色谱-串联质谱法测定玉米中噻虫嗪含量的不确定度.方法 采用GB/T 20770-2008《粮谷中 486 种农药及相关化学品残留量的测定液相色谱-串联质谱法》方法,建立数学模型,计算各来源对其检测的不确定度影响,从而得出合成不确定度和扩展不确定度.结果 对于噻虫嗪质量分数为0.282 mg/kg的玉米样品,其扩展不确定度为0.041 mg/kg(P=95%,k=2).结论 影响检测结果的不确定度主要来源为试样溶液的测定.
Abstract
Objective To evaluate the uncertainty in the determination of thiamethoxam content in corn by high-performance liquid chromatography-tandem mass spectrometry.Methods According to GB/T 20770-2008 Determination of 486 Pesticides and Related Chemicals Residues in Grains-Liquid Chromatography-Tandem Mass Spectrometry method,by establishing a mathematical model,the sources of uncertainty were analyzed and the effects of different sources were measured and calculated.Results Forthe corn samples with a mass fraction of 0.282 mg/kg of thiamethoxam,the extended uncertainty was 0.041 mg/kg(P=95%,k=2).Conclusion The main source of uncertainty affecting the test result is the determination of sample solution.
关键词
液相色谱-串联质谱法/噻虫嗪/不确定度Key words
high performance liquid chromatography-tandem mass spectrometry/thiamethoxam/uncertainty引用本文复制引用
出版年
2024
NETL
NSTL
万方数据