气相色谱法测定餐具洗涤剂中的甲醇
焦恩强1,刘光伟1,刘凤梅1,孟强1,金日鑫2
1.泰安市产品质量监督检验所,山东泰安 271000; 2.长春理工大学,长春 130000
Determination of methanol in tableware detergents by gas chromatography
JIAO Enqiang1, LIU Guangwei1, LIU Fengmei1, MENG Qiang1, JIN Rixin2
1. Taian Institute of Product Quality Supervision & Inspection, Taian 271000, China; 2. Changchun University of Science and Technology, Changchun 130000, China
摘要:建立以4-甲基-2-戊醇为内标物, DB-FFAP毛细管柱气相色谱分离的液体洗涤剂中甲醇含量的测定方法。建立以4-甲基-2-戊醇为内标物, DB-FFAP毛细管柱气相色谱分离的液体洗涤剂中甲醇含量的测定方法。通过与外标法对比分析并绘制加标浓度相关趋势图,为洗涤剂中甲醇含量的测定提供参考依据。在甲醇的质量浓度0~1 000 mg/L范围内,甲醇与内标物的色谱峰面积比值与质量浓度比值具有良好的线性关系,相关系数为0.999 9。样品加标回收率为91.2%~99.6%,相对标准偏差小于3% (n=6)。该方法快速、灵敏。
Abstract:4-methyl-2-pentanol as the internal standard, methanol in tableware detergents was determined by gas chromatography with DB-FFAP capillary column. The relevant trend graphs was drawn through comparative analysis with external standard method, which provide a reference basis for the determination of methanol in tableware detergents. There was a good linear relationship between the ratio of the chromatograph peak areas and the ratio of the mass concentrations when the mass concentration of methanol was in the range of 0-1 000 mg/L, the correlation coefficient was 0. 999 9. The average recovery ranged from 91.2% to 99.6% with the relative standard deviation less than 3% (n=6). This method is fast and sensitive.
关键词:气相色谱法;内标法;餐具洗涤剂;甲醇
Keywords:gas chromatograph; internal standard; tableware detergents; methanol
本文引用格式:
焦恩强,刘光伟,刘凤梅,等.气相色谱法测定餐具洗涤剂中的甲醇[J].化学分析计量,2022,31(1):58.JIAO Enqiang,LIU Guangwei,LIU Fengmei,et al. Determination of methanol in tableware detergents by gas chromatography[J]. Chemical Analysis and Meterage,2022,31(1):58.
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