Memory Effects on Adsorption Tubes for Mercury Vapor Measurement in Ambient Air: Elucidation, Quantification, and Strategies for Mitigation of Analytical Bias

被引：15

作者：

Brown, Richard J. C. ^{[1
]}

Kumar, Yarshini ^{[1
]}

Brown, Andrew S. ^{[1
]}

Kim, Ki-Hyun ^{[2
]}

机构：

[1] Natl Phys Lab, Analyt Sci Div, Teddington TW11 0LW, Middx, England

[2] Sejong Univ, Dept Environm & Energy, Atmospher Environm Lab, Seoul 143747, South Korea

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2011年 / 45卷 / 18期

基金：

新加坡国家研究基金会;

关键词：

ATMOSPHERIC MERCURY; AMALGAM METHOD; GOLD; FILMS;

D O I：

10.1021/es201454u

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The short- and long-term memory effects associated with measurements of mercury vapor in air using gold-coated silica adsorption tubes have been described. Data are presented to quantify these effects and to determine their dependence on certain relevant measurement parameters, such as number of heating cycles used for each analysis, age of adsorption tube, mass of mercury on adsorption tube, and the length of time between analyses. The results suggest that the long-term memory effect is due to absorption of mercury within the bulk gold in the adsorption tube, which may only be fully liberated by allowing enough time for this mercury to diffuse to the gold surface. The implications of these effects for air quality networks making these measurements routinely has been discussed, and recommendations have been made to ensure any measurement bias is minimized.

引用

页码：7812 / 7818

页数：7

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