液相色谱-质谱/质谱法测定谷物中甲磺隆残留量的测量不确定度评定  

Uncertainty analysis of metsulfuron-methyl in grain by HPLC-MS/MS method

作　　者：刘旭 任正东 蒋国振 龚珊 刘萍 LIU Xu;REN Zheng-dong;JIANG Guo-zhen;GONG Shan;LIU Ping(Shaanxi Provincial Institute of Cereal and Oil Product Quality Inspection,Xi'an 710016,China)

机构地区：[1]陕西省粮油产品质量监督检验中心,陕西西安710016

出　　处：《粮食与饲料工业》2018年第9期56-59,共4页Cereal & Feed Industry

摘　　要：对谷物中甲磺隆残留量的高效液相色谱-串联质谱法测定过程进行了研究,分析测量过程的不确定度来源,并且对不确定度的各个分量进行评估和合成。结果表明,标准溶液的配制、方法的回收率和样品制备引入的不确定度分量是影响甲磺隆残留量测定不确定度的主要原因。当谷物中甲磺隆残留量为19.9μg/kg时,扩展不确定度为1.4μg/kg,测定结果表示为X=(19.9±1.4)μg/kg,k=2,P=95%。To study the uncertainty of metsulfuron-methyl in grain by HPLC-MS/MS method,we analyzed the uncertainty sources in measurement process,and evaluated and synthesized each component of uncertainty.Results showed that the most significant factors contributing to the determination of metsulfuron-methyl were the standard solution preparation,method recoveries and the process of sample preparation.As the content of metsulfuron-methyl was 19.9μg/kg,the expanded uncertainty was 1.4μg/kg.The result of metsulfuron-methyl content was expressed as follows:X=(19.9±1.4)μg/kg,k=2,P=95%.

关 键 词：谷物 甲磺隆 液相色谱-质谱/质谱法 不确定度 

分 类 号：TS207.5[轻工技术与工程—食品科学]