摘要
建立以2.2mmol/L的Na2CO3和2.7mmol/L的NaHCO3的混合溶液为吸收液,同时串联两个大气采样瓶采样,第一个采样瓶的吸收液内含质量体积比为0.05%的乙二胺四乙酸二钠盐（EDTA）吸收大气中SO2和NO2,第二个采样瓶的吸收液中内含质量体积比为0.9%的过氧化氢采集大气中的NO,采样后用离子色谱法测定,若用10ml吸收液,采样体积为30L时,SO2的检出限为0.004mg/m^3,可测浓度范围为0.03-26.7mg/m^3;NO2的检出限为6.7×10^-4mg/m^3,可测浓度范围为0.03-20mg/m^3。方法简便快速、准确、选择性好,完全满足环境监测对大气中二氧化硫和氮氧化物的同时测定。
We established a novel method detecting Sulfur Dioxide and oxides of nitrogen in air at the same time by Ion Chromatography. The method is simple, efficient, accurate, sensitive, and could be accorded with the actual demands in Environmental analysis, none toxic regent is used which is beneficial to environmental protection. When the sampling volume is 30L, for SO2, the detection limit was 0. 004mg/m^3 , the linear range is from 0.03 to 26.7mg/m^3 ;for NO2 , the detection limit is 6.7× 10^-4 mg/m^3 , and the linear range is from 0.03 to 20mg/m^3.
出处
《中国环境监测》
CAS
CSCD
北大核心
2008年第2期21-24,共4页
Environmental Monitoring in China
关键词
大气
二氧化硫
氮氧化物
离子色谱
同时测定
Air
Sulfur dioxide
Oxides of nitrogen
Ion Chromatography
Simultaneously determination
