摘要
目的改进工作场所空气中的氮氧化物含量的采样分析检测方法。方法采集工作场所空气中氮氧化物,以碳酸钠+碳酸氢钠缓冲溶液吸收采集,离子色谱分析(色谱柱AS 23,柱温30℃)。结果NO2-在0~90.0μg/ml(二氧化氮在0~120.0 mg/m^3)范围线性关系良好,相关系数为0.9995,方法检出限为0.16μg/ml,采样体积以7.5 L计算,本方法的最低检出浓度0.11 mg/m^3。结论该方法精密度和灵敏度较高,样品不需要前处理直接进样,本方法在一般实验室易于推广使用,能满足工作场所空气中氮氧化物的测定。
Objective Improvement the method of nitrogen oxide sampling,analysis and detection in workplace air.Methods Absorption and collection with sodium carbonate-sodium bicarbonate buffer solution,analysised by ion chromatography,anion column AS23,column temperature 30℃.Results The linearity of the nitrite ion in the corresponding mass concentration range 0~90.0μg/ml was good(Nitrogen dioxide in 0~120.0 mg/m^3),correlation coefficient>0.9995.The detection limit was 0.16μg/ml,The minimum detection concentration was 0.11 mg/m^3 with the sampling volume 7.5 L.Conclusion The method has good accuracy,high sensitivity,with directing injection and no pre-treatment,and can popularize in general laboratories,and can satisfy the determination of nitrogen oxides in the air of workplace.
作者
孟成名
孟正丽
秦文华
余善法
Meng Chengming;Meng Zhengli;Qin Wenhua;Yu Shanfa(The Institute of Occupational Disease Prevention of Henan Province,Zhengzhou 450052,China;Xuchang People's Hospital,Xuchang 461000,China)
出处
《中华劳动卫生职业病杂志》
CAS
CSCD
北大核心
2019年第12期932-935,共4页
Chinese Journal of Industrial Hygiene and Occupational Diseases
关键词
色谱法
离子
工作场所
空气
氮氧化物
Chromatography,Ion
Workplace
Atmospheres
Nitrogen oxide
