Head-Space GC Determination of Methanol in Air
摘 要
提出了顶空-气相色谱法测定空气中甲醇的方法。选择顶空平衡温度和时间分别为75 ℃和60 min,顶空瓶中样品定容体积为2 mL,用DB-WAX色谱柱分离,火焰离子化检测器检测。甲醇的质量浓度在91.20 mg·L-1以内与其峰面积呈线性关系,检出限(3s)为1.8 mg·L-1。在11.40,22.80,45.60 mg·L-1 3个浓度水平进行加标回收试验,测定值的相对标准偏差(n=6)在2.6%~3.4%之间,方法解吸率在96.5%~98.2%之间。
Abstract
Head-space GC was applied to the determination of methanol in air. The equilibrium temperature and time of head space were set at 75 ℃ and 60 min respectively, with 2 mL of the sample in head-space bottle. The analyte were separated on DB-WAX column and detected by FID. Linear relationship between values of peak area and mass concentration of methanol was kept in the range within 91.20 mg·L-1 with detection limit (3s) of 1.8 mg·L-1. Tests for recovery were made at the concentration levels of 11.40,22.80 and 45.60 mg·L-1 of methanol standard, giving values of RSD′s (n=6) in the ranges of 2.6%-3.4%. The rate of desorption found was in the range of 96.5%-98.2%.
中图分类号 O657.7
所属栏目 工作简报
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收稿日期 2012/8/10
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备注徐森彪(1986-),男,江苏盐城人,主要从事理化检验分析工作。
引用该论文: XU Sen-biao,ZHAO Su-yun. Head-Space GC Determination of Methanol in Air[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2013, 49(9): 1068~1069
徐森彪,赵苏云. 顶空-气相色谱法测定空气中甲醇[J]. 理化检验-化学分册, 2013, 49(9): 1068~1069
被引情况:
【1】邹家素,刘坤, "废气中甲醇采样方法和分析方法的改进",理化检验-化学分册 52, 226-228(2016)
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参考文献
【1】GBZ/T 160.48-2007工作场所空气中醇类化合物的测定方法[S].
【2】彭炳先,洪艳平,陈光美.顶空气相色谱法测定酱油甲醇和乙醇含量[J].理化检验-化学分册, 2009,45(12):1451-1452.
【3】唐庆华.顶空气相色谱法测定依莫法宗中溶剂残留[J].国外分析仪器, 2002(2):54-57.
【4】GA/T 105-1995血尿中乙醇、甲醇、正丙醇、乙醛、丙酮、异丙醇、正丁醇、异戊醇的定性分析及乙醇、甲醇、正丙醇的定量分析方法[S].
【2】彭炳先,洪艳平,陈光美.顶空气相色谱法测定酱油甲醇和乙醇含量[J].理化检验-化学分册, 2009,45(12):1451-1452.
【3】唐庆华.顶空气相色谱法测定依莫法宗中溶剂残留[J].国外分析仪器, 2002(2):54-57.
【4】GA/T 105-1995血尿中乙醇、甲醇、正丙醇、乙醛、丙酮、异丙醇、正丁醇、异戊醇的定性分析及乙醇、甲醇、正丙醇的定量分析方法[S].
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