摘 要：采用液相色谱-质谱联用法测定辣椒粉中甲胺磷的残留量，根据测定过程对测量不确定度进行评定。辣椒粉中甲胺磷的检测结果可表示为(0.031 0±0.001 1)mg·kg-1，k=2。测定过程中校准过程对甲胺磷测量不确定度的影响最大，其次是样品前处理过程和测定过程中的随机效应，体积变化和样品称量对不确定度的影响较小。检测时应重点关注校准过程，尽量减小其对测量结果不确定度的影响。

    关键词：不确定度；甲胺磷；液相色谱-质谱联用法

    Abstract： Liquid chromatography-mass spectrometry was used to determine the residual amount of methamidophos in chili powder， and the measurement uncertainty was evaluated according to the determination process. The detection result of methamidophos in chili powder can be expressed as (0.031 0±0.001 1) mg·kg-1 ......