摘要
建立了测定居室空气中甲醛的衍生气相色谱法。方法的检测限为０．０２ｍｇ／Ｌ（水溶液），当采气量为１０Ｌ时，最低检出浓度为０．０１ｍｇ／ｍ３（居室空气），变异系数为４．１％～６．５％，回收率为７１．０％～９０．４％。
Formaldehyde in indoor air was collected by water, derivatized with 2,4 dinitrophenylhydrazine and extracted by cyclohexane. The sample was separated on an OV 17 and QF 1 mixed chromatographic column and determined by electron capture detector. The detection limit was 0.02mg/L(solution), the minimum detectable concentration was 0.01mg/m 3 while 10L indoor air was collected. The results show that this is a rapid and sensitive method with less interferences and fairly good precision. The recoveries were 71.0% 90 4% and coefficients of variation were 4.1% 6.5%. The development of this method has made a reliable methodological foundation for the determination of formaldehyde in indoor air.
出处
《色谱》
CAS
CSCD
北大核心
1998年第4期363-364,共2页
Chinese Journal of Chromatography
关键词
衍生气相色谱法
甲醛
居室空气
GC
gas chromatography with derivatization, indoor air, formaldehyde
