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研究了α-硫辛酸中有机溶剂残留量气相色谱定量方法的测量不确定度的评定方法。通过建立数学模型,对测量过程的不确定度来源如:样品称样量、定容体积、工作曲线、测试方法的回收率和重复性的各不确定度分量进行分析评定和量化,计算了合成不确定度和扩展不确定度,α-硫辛酸中有机溶剂残留量的GC定量结果表示为乙醚(0.252±0.006)%;k=2;异丙醚(0.092±0.002)%;k=2。本试验的不确定度主要由外标工作曲线所引起。
The method for the determination of the uncertainty of the determination of residual organic solvents in α-lipoic acid by gas chromatography was studied. By establishing a mathematical model, the source of the uncertainty of the measurement process such as: sample sample volume, volumetric volume, working curve, the recovery rate of the test method and the repetitive uncertainty components were analyzed and evaluated and quantified to calculate the synthesis Uncertainty and extended uncertainty, GC quantitative results of organic solvent residues in α-lipoic acid are expressed as ether (0.252 ± 0.006)%; k = 2; isopropyl ether (0.092 ± 0.002)%; The uncertainty of this test is mainly caused by the external standard working curve.