摘要
目的:为项目《机动车尾气污染健康效应评价技术的研究》选择高暴露人群及环境监测方法,内容包括通过对城市交通路口氮氧化物(NOx)浓度的监测,评估市区汽车尾气污染的水平和高暴露人群的NOx暴露特征;NOx浓度的监测采用盐酸萘乙二胺比色法,并用电子仪器监测结果加以对照,比较两种监测方法的监测结果的差异。方法:对NOx进行比色法与仪器法的现场监测,并进行统计分析。结果:交通路口NOx污染指标浓度均比对照点高(交通路口的NOx、NO2、NO浓度,NO/NO2比值的中位数分别为0.61、0.26、0.29、1.71,对照点为0.14、0.10、0.03、0.38),P<0.05,交通路口的NOx暴露以NO暴露为主,对照点以NO2为主;两种检测方法的结果有一定相关性(Spearmen秩相关分析P<0.05)。结论:交通路口NOx污染较重,污染物以NO为主;清洁对照点污染物以NO2为主;在反映NOx浓度变化趋势上,仪器法有参考价值。
Objective： To choose exposed group and method of environmental monitoring for the program ＂Study on the assess- ment technology of health effect of vehicle emission pollution＂, including the monitoring of nitrogen oxides in urban traffic junc- tion, to describe the characteristics of automobile pollution in the city and the NOx exposure characteristics of high - risk people. Methods： NOx concentration was monitored by colorimetry of Naphthylethylenediamine dihydrochloride and the result was com- pared with that obtained by instrument method. Then the differences between the two methods were compared and analyzed by sta- tistics. Results： On - site monitoring of NOx and statistical analysis showed that NOx pollutant concentration was higher at the traffic junction than control point （ NOx, NO2, NO concentration and the median ratio of NO/NO2 were 0. 61,0. 26,0. 29,1. 71 at the traffic junction, while 0.14,0.10 ,0. 03 ,0. 38 at the control point） ; the results of the two detection methods had a certain cor- relation （ Spearmen rank correlation P 〈 0.05）. Conclusion： At traffic junctions, NOx exceeds limits and it is NO - based ; at control points, NOx basically reaches the standards and it is NO2 - based. On observing the trend of the NOx concentration chan- ges, instrument method has reference value.
出处
《中国卫生检验杂志》
北大核心
2012年第2期343-345,共3页
Chinese Journal of Health Laboratory Technology
基金
国家十一五科技支撑项目(2006BAⅠ19B06)
关键词
氮氧化物
NO2
盐酸萘乙二胺比色法
interscan数字便携式气体仪
Nitrogen oxides
NO2
Colorimetry of Naphthylethylenediamine dihydrochloride
Interscan digital - portable - type gas - monitoring instrument
