Objective To analyze the uncertainty in the determination of plumbum in homemade positive pork by graphite furnace atomic absorption spectrometry to provide the evidence for the measurement evaluation. Methods Graphite furnace atomic absorption spectrometry was used to determine the content of plumbum in pork. The determination process was analyzed to identify the source of uncertainty and the combined uncertainty was calculated．Results The content of plumbum in homemade positive pork was 0.236 mg/kg, and the expanded uncertainty was 0.026 mg/kg (k=2). The main factors of the uncertainty were standard curve linear fitting and analytical instruments. Conclusion The control of preparation of standard curve and the maintenance of analytical instruments can reduce the uncertainty of plumbum content in pork by graphite furnace atomic absorption spectrometry.
标题：石墨炉原子吸收分光光度法测定自制阳性猪肉中铅的不确定度评定
英文标题：Uncertainty analysis of plumbum determination for homemade positive pork by graphite furnace atomic absorption spectrometry
