应用离子色谱法测定环境空气颗粒物中水溶性离子研究

Determination of Water-Soluble Anions and Cations in Ambient Air Particulates by Ion Chromatography

采用双系统离子色谱仪测定了环境空气颗粒物中阴阳离子F^(-)、NO_(3)^(-)、Cl^(-)、SO_(4)^(2-)、K^(+)、Na^(+)、Ca^(2+)、Mg^(2+)8种水溶性离子,测试全程序空白、标准回归曲线、检出限、精密度、准确度和实样等,结果表明:双系统离子色谱仪自动化程度高、性能稳定,能同时监测8种阴阳离子,节约大量人力和时间。该方法具有较理想的线性回归,相关系数均大于0.999,检出限均满足标准方法检出限,标准点及实样精密度试验相对标准偏差均小于5%,准确度试验中有证标准物质均在真值范围内,对镇江市典型区域颗粒物滤膜样品监测有较好的适用性。

The water-soluble anions F^(-),NO_(3)^(-),Cl^(-),SO_(4)^(2-),K^(+),Na^(+),Ca^(2+)and Mg^(2+)in ambient air particles were determined by ion chromatography.The results show that the ion chromatography has the advantages of high automatization and stable performance,as well as can simultaneously monitor anions and cations,which saves a lot of manpower and time.The correlation coefficient of the method is higher than that of the 0.999.The detection limit of the standard method is satisfied.The relative standard deviation of the standard point and the precision test of the sample is less than 5%.The certified reference materials in the accuracy test were all within the true value range.The method is suitable for the monitoring of particulate matter in typical areas of Zhenjiang.