CAJ | 학술논문

目的：对气相质谱法测定黄芪中二嗪磷残留量的不确定度进行评价。方法建立标准工作曲线和样品定量测定的数学模型,对实验过程中各影响因素进行评价。结果主要从标准曲线的变动性、测定结果的重复性、二嗪磷的浸出率以及内标物取样量4个方面进行量化,并计算出合成不确定度为0.016 mg/kg,取k=2的扩展不确定度为0.032 mg/kg,黄芪中二嗪磷残留量为(0.091±0.032)mg/kg。结论标准曲线的变动性是影响结果不确定度的主要因素,使用更高响应的检测方法,可有效提高标准曲线的线性,减少此类测量的不确定度。
목적：대기상질보법측정황기중이진린잔류량적불학정도진행평개。방법건립표준공작곡선화양품정량측정적수학모형,대실험과정중각영향인소진행평개。결과주요종표준곡선적변동성、측정결과적중복성、이진린적침출솔이급내표물취양량4개방면진행양화,병계산출합성불학정도위0.016 mg/kg,취k=2적확전불학정도위0.032 mg/kg,황기중이진린잔류량위(0.091±0.032)mg/kg。결론표준곡선적변동성시영향결과불학정도적주요인소,사용경고향응적검측방법,가유효제고표준곡선적선성,감소차류측량적불학정도。
Objective To evaluate the uncertainty for diazinon residues in Astragail radix by gas chromatography-mass spectrometry. Methods The models for evaluation of the uncertainty about both standard work curve and sample quantitative testing were established, and the factors that influenced the measurement were investigated. ResultsThe four main factors were quantized including mobility of standard curve, repetitiveness of testing results extract efficiency of diazinon in Astragali radix, and the volume of internal standard solution. The combined standard uncertainty was obtained as 0.016 mg/kg, the expanded uncertainty was 0.032 mg/kg when k=2, then diazinon residues in Astragali radix was determined as (0.091±0.032) mg/kg. ConclusionMobility of standard curvewas the primary factor for the measurement of uncertainty. The uncertainty may be reduced and the linearity of standard curve may be increased by using the higher responsive detector.