气相色谱法测定食品中的脱氢乙酸 |
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作者姓名: | 刘晓燕 |
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作者单位: | 北京世纪科环生态农业研究院,北京 101102 |
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摘 要: | 建立气相色谱法测定食品中脱氢乙酸的分析方法.样品经正己烷提取,弃去正己烷层,加入乙酸乙酯提取后,氮吹至近干,用乙酸乙酯定容至1 mL.气相检测器为FID,外标法定量.结果显示,在0.10~10.00 mg·L-1,线性方程y=21091x+19260,相关系数为0.9992;脱氢乙酸的添加回收率为71.0%~87.7%...
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关 键 词: | 脱氢乙酸 气相色谱法 检测 |
Determination of Dehydroacetic Acid in Food by Gas Chromatography |
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Authors: | LIU Xiaoyan |
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Institution: | (Beijing Century Kehuan Ecological Agriculture Institution,Beijing 101102,China) |
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Abstract: | The sample was extracted by n-hexane,the n-hexane layer was discarded,ethyl acetate was added,nitrogen was blown to near dry,and the volume was fixed with ethyl acetate to 1 mL.Gas phase detector for FID,external standard method quantification.The results show that in the range of 0.10~10.00 mg·L-1,the linear equation y=21091x+19260 and the correlation coefficient is 0.9992.The recoveries of dehydroacetic acid were 71.0%~87.7%,and the relative standard deviations(n=6)of the determination results were 1.69%~3.93%.The limit of detection was 1.15×10-5g·kg-1and the limit of quantification was 2.08×10-4g·kg-1.This method has the advantages of simple extraction process,convenient operation,accurate and reliable results and good reproducibility. |
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Keywords: | dehydroacetic acid gas chromatography detection |
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