吹扫捕集-气相色谱法测定空气中的甲醛含量  

The Determination of Formaldehyde in Air by Purge and Trap-gas Chromatography

作　　者：尹艳凤[1,2] 王安群[1] 李倦生[1] 陈小明[2] 

机构地区：[1]长沙环境保护职业技术学院,长沙410004 [2]湘潭大学,湘潭411105

出　　处：《湖南工程学院学报（自然科学版）》2012年第3期72-74,87,共4页Journal of Hunan Institute of Engineering(Natural Science Edition)

摘　　要：以蒸馏水作为吸收介质吸收空气中的甲醛,在常温下进行吹扫捕集,并用气相色谱法进行测定.同时对甲醛的稳定剂甲醇的用量、吹扫捕集的吹扫气流速和吹扫时间进行了优化,并在优化的实验条件下,测定了某新装修房间的甲醛含量.该方法对甲醛的检出浓度可达到0.04mg/m3,且除了使用极微量的甲醇以外,几乎没用到有机溶剂,因此该方法具有检出限低、灵敏、快速、环保等特点.This paper mainly studies the calculation of transverse temperature stress for concrete box girder under the sunshine temperature load. Based on thermo-elastic theory, and strain prevent theory and con sidering longitudinal and transversal stress coupling, a new calculation method for transverse temperature stress is proposed. The comparison with the Chinese highway bridge design code which uses structural me chanics and does not considers stress coupling proves that there are significant differences in the results of two different calculation methods.

关 键 词：甲醛 吹扫捕集 气相色谱 检出限 

分 类 号：X510.2[环境科学与工程—环境工程]