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《化学分析计量》 2022年第06期
DOI:10.3969/j.issn.1008-6145.2022.06.019
气相色谱法测定薄荷脑含量的不确定度评定
金凤华
合肥市食品药品检验中心,合肥 238000 
Valuation of uncertainty for determination of menthol by gas chromatography
JIN Fenghua
Hefei Food and Drug Inspection Center, Hefei 238000, China 
摘要:对气相色谱法测定薄荷脑含量进行测量不确定度评定。分别对测量重复性、天平称量、定容体积及仪器进样等影响测定结果的因素进行分析,建立数学模型,采用气相色谱法测定薄荷脑的含量,并根据《中国药典》2020年版及《测量不确定度评定与表示》(JJF 1059.1—2012)确定其不确定度。当薄荷脑质量分数为100.12%时,测量得扩展不确定度为0.76%(k=2),气相色谱法测定薄荷脑含量的不确定度主要来源于样品称量及样品处理过程中的稀释步骤。该方法为评价实验操作的规范性提供了科学依据。 
Abstract:The uncertainty of determination of menthol by gas chromatography was evaluated. The factors of determination results such as measurement repeatability, balance weighing, constant volume and instrument injection were analyzed, and the mathematical model was established. The content of menthol was determined by gas chromatography, and the uncertainty of determination of menthol was valuated according to Chinese Pharmacopoeia (2020 edition) and Evaluation and Expression of Measurement Uncertainty (JJF 1059.1—2012). When the mass fraction of menthol was k 100.12%, the extended uncertainty of the determination was 0.76%( =2). The uncertainty of menthol determination by gas chromatography was mainly introduced by the weighing of the sample and the dilution volume during the preparation of the sample. The method provided a scientific basis for the evaluation of the standardization of experimental operation. 
关键词:不确定度;气相色谱法;薄荷脑;含量测定 
Keywords:uncertainty; gas chromatography; menthol; content determination 
本文引用格式:
金凤华.气相色谱法测定薄荷脑含量的不确定度评定[J].化学分析计量,2022,31(6):83.
JIN Fenghua. Valuation of uncertainty for determination of menthol by gas chromatography[J]. Chemical Analysis and Meterage,2022,31(6):83. 

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