硅胶管富集-气相色谱法测定环境空气和废气中乙酸
GC Determination of Acetic Acid in Ambient Air and in Waste Gas After Enrichment with Silica Gel Adsorption Tube
摘 要
提出了用硅胶管吸附,丙酮做解吸溶剂,气相色谱法测定环境空气和废气中的乙酸.选用DM-FFAP毛细管柱(30 m×0.25 mm,0.25 μm)作为色谱柱避免了丙酮中杂质对测定的干扰.按采样体积30 L计算,检出限(3S/N)为0.02 mg·m-3.在吸附管中加入3个不同浓度水平的乙酸标准溶液作回收试验,测得回收率在88.0%~105.7%之间,相对标准偏差(n=7)均小于8%.
硅胶管
乙酸
丙酮
环境空气
废气
Gas chromatography
Silica gel adsorption tube
Acetic acid
Acetone
Ambient air
Waste gas
Abstract
Acetic acid in samples of ambient air or waste gas was enriched by adsorption with silica gel tube and desorbed with acetone,which was used for GC analysis. The capillary column,DM-FFAP (30 m×0.25 mm,0.25 μm) was selected as the chromatographic column to eliminate interferences from impurities in acetone. Detection limit (3S/N) of 0.02 mg·m-3 was obtained as calculated on the base of sampling volume of 30 L. Test for recovery was made by adding standard solutions of acetic acid to the adsorption tubes at 3 different concentration levels,values of recovery found were in the range from 88.0% to 105.7%,with values of RSD′s (n=7) less than 8%.
中图分类号 O657.7
所属栏目 工作简报
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收稿日期 2008/10/17
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备注胡恩宇(1977-),女,江苏沭阳人,工程师,主要从事环境中有机污染物的分析.
引用该论文: HU En-yu,YANG Li-li,MU Ying-feng,WANG Mei-fei,WANG Li-yuan. GC Determination of Acetic Acid in Ambient Air and in Waste Gas After Enrichment with Silica Gel Adsorption Tube[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2009, 45(12): 1435～1436
胡恩宇,杨丽莉,母应锋,王美飞,王丽媛. 硅胶管富集-气相色谱法测定环境空气和废气中乙酸[J]. 理化检验－化学分册, 2009, 45(12): 1435～1436
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