被动采样器在采样过程中空白污染来源的确认及控制  

Verification and control of blank contamination sources of passive samplers in passive sampling

作　　者：吕海霞 方琳美 徐方圆[2] 施超欧 LYU Haixia;FANG Linmei;XU Fangyuan;SHI Chao’ou(Analysis and Testing Center,School of Chemistry&Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China;Key Scientific Research Base of Museum Environment(Shanghai Museum),State Administration for Cultural Heritage,Shanghai 200231,China)

机构地区：[1]华东理工大学化学与分子工程学院分析测试中心,上海200237 [2]馆藏文物保存环境国家文物局重点科研基地(上海博物馆),上海200231

出　　处：《文物保护与考古科学》2019年第5期99-104,共6页Sciences of Conservation and Archaeology

摘　　要：在博物馆微环境污染气体被动采样过程中,常出现被动采样器空白值高及易被污染的问题。针对这些问题,研究者对被动采样整个环节中涉及的进样瓶、提取瓶以及采样器各部件单元进行了空白分析,同时考察了不同制样环境、不同提取环境、不同温度烘干的滤纸对采样器空白值的影响,最终明确了采样器中不同污染离子的来源,提出了控制方案,优化了制样方法,有效降低了整体空白值,出现污染的概率从30%左右降低至5%,为博物馆污染气体采样分析提供了可靠的技术支持。In the process of passive sampling of pollution gases in the microenvironment of museums,passive samplers often have high blank values and are easily contaminated.In order to solve these problems,we carried out blank analyses on sample bottles,extraction bottles and other components of samplers involved.Also,we investigated the influences of different sample preparation and extraction environments,as well as filter papers dried at different temperatures,on the blank values of samplers.Finally,the sources of different contamination ions in the sampler were identified,the control scheme was put forward and the method of sample preparation was optimized.The overall blank value was effectively reduced and the probability of contamination was reduced from about 30%to 5%.The study provides reliable technical support for the methodology of sampling and analysis of pollution gases in museums.

关 键 词：被动采样器 空白污染 超净室 离子色谱法 

分 类 号：X820.1[环境科学与工程—环境工程]