摘要
提出了用GC MS分析大气细粒子中极性有机化合物的测定方法 ,给出了 2类衍生化反应的最佳条件 .标准物质工作曲线相关系数在 0 995~ 1 0 0 0之间 ,仪器精密度为 1 %~ 1 0 % ,标准物质的标准偏差为 3%~ 2 0 % ,实际样品的标准偏差为 3%~ 1 7% ,仪器定量限为 0 1~ 4 0ng·μL-1 .实测了北京市夏、秋、冬 3季大气细粒子样品 ,定量极性有机化合物 4 2种 ,其中一元羧酸 30种、二元羧酸 5种、无水单糖 3种、甾醇类 3种和苯甲酸 。
A determination method was developed for the quantification of polar organic compounds in atmospheric fine particles in Beijing City by GC MS. The optimally reactive conditions of two derivative methods were set up. The related coefficients ( R 2) of standard curves were 0 995~1 000. The precise of the GC MS was 1%~10%, and the quantified detection limits ranged from 0 1 to 4 0 ng·μL -1 depending on the various standard compounds. The percent relative standard deviation of standards and atmospheric samples were 3%~20% and 3%~17%, respectively. The methods were applied for Beijing fine particle samples in summer, fall, and winter in 2002. Total 42 polar organic compounds were identified and quantified, including 30 n aliphatic and n alkenoic acid species, 5 aliphatic dicarboxylic acid species, 3 monosaccharide anhydrides, 3 steroids, and benzoic acid. The sources of these compounds were discussed.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2004年第5期15-20,共6页
Environmental Science
基金
国家自然科学基金资助项目 ( 2 0 13 1160 73 1
3 0 2 3 0 3 10
2 0 1770 0 2 )
国家高技术研究发展计划 ( 863计划 )项目( 2 0 0 1AA64 10 60 )