摘要
挥发性卤代烃（VHC）是大气中的痕量气体，对臭氧层损耗和温室效应有重要作用。海洋是大气中VHC的主要自然排放源，开展海洋VHC的研究有助于了解海洋对大气VHC和全球变暖的贡献。本文建立了吹扫-捕集与气相色谱-微池电子捕获检测器联用技术（P—T—GC（ECD）分析海水中6种VHC的方法，确定了吹扫-捕集条件和气相色谱分离条件。该方法的检测限在0．003～0．369ng·L^-1之间；相对标准偏差是1．83～3．97；加标回收率为98．1％～110．2％；相关系数在0．9973-0．9998之间。可准确地测定海水中6种VHC。
Volatile halocarbons （VHCs） are important atmospheric trace gases, which play significant roles in stratospheric ozone depletion and in the greenhouse effect. The ocean is a natural source of atmospheric VHCs. The studies of VHCs in the ocean are helpful to understanding the contribution of the ocean to atmospheric VHCs and global warming. A cryogenic purge and trap technique combined with gas chromatographic separation and electron capture detection was developed for the analysis of 6 kinds of VHCs in seawater in this paper. The optimum conditions for the purge-trap and chromatographic analysis of VHCs were confirmed. Detection limits of 0. 003 - 0. 369 ng· L^- 1, RSD percentages of 1.83 % - 3.97 %, spiking recoveries of 98.1%- 110.2 %, and coefficient correlations of 0. 997 3 -0. 999 8 were obtained.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第2期299-304,共6页
Periodical of Ocean University of China
基金
国家杰出青年科学基金(40525017)
山东省自然科学基金重点项目(Z2005E01)
山东省"泰山学者"建设工程专项经费(JS200510016)资助
关键词
海水
挥发性卤代烃
分析方法
吹扫-捕集法
seawater
volatile halocarbons
analytical method
purge and trap technique
