离子色谱法同时测定土壤中Cl^-、SO4^2-和NO3^-  

Simultaneously Determination of Cl^-,SO4^2- and NO3^- in Soils by Ion Chromatography

作　　者：李龙飞 朱永晓 张宁 于聪灵 LI Longfei;ZHU Yongxiao;ZHANG Ning;YU Congling(Geological Experiment and Testing Center Hebei Province,Baoding,HeBei 071052,China)

机构地区：[1]河北省地质实验测试中心,河北保定071052

出　　处：《中国无机分析化学》2021年第1期39-43,共5页Chinese Journal of Inorganic Analytical Chemistry

摘　　要：利用离子色谱法同时测定土壤中的Cl^-、SO4^2-、NO3^-三种无机阴离子。采用30 mmol/L KOH淋洗液在1.2 mL/min流速下对Cl^-、SO4^2-、NO3^-三种无机阴离子进行分离测定,混合标准溶液的相对标准偏差为0.16%~0.84%,三种阴离子的线性范围都在0~150 mg/L,线性相关系数均大于0.999。三种阴离子的检出限分别是0.062、0.096和0.064 mg/L。对四种国家标准物质的测定结果表明(n=9),测定值与标准值一致,相对标准偏差(RSD)<3%,三种阴离子的加标回收率为95.6%~109%。采用离子色谱法测定土壤中的Cl^-、SO4^2-、NO3^-三种无机阴离子,方法简便、快捷、无污染,对人体无任何伤害,真正实现了绿色化学的分析要求。在6 min以内完成分析,适合大批量土壤水溶盐阴离子的测定。The Cl^-,SO4^2-,NO3^- three inorganic anions in the soil were measured simultaneously by ion chromatography.Using 30 mmol/L KOH leaching fluid at 1.2 mL/min flow rate,Cl^-,SO4^2-,NO3^- three inorganic anions were isolated and determined,and the relative standard deviation of mixed standard solutions was 0.16%to 0.84%,and the linear range of the three anions was 0 to 150 mg/L,The linear correlation coefficients were greater than 0.999.The detection limits for the three anions were 0.062,0.096 and 0.064 mg/L.The results of the measurement of four national standard substances showed that the measured value was consistent with the standard value,and the value of the three anions was 95.6%to 109%.This experiment uses ion chromatography to determine the Cl^-,SO4^2-,NO3^- three inorganic anions in the soil,compared with the traditional method,the analysis is simple and fast without any harm to the human body,and really meets the analysis requirements of green chemistry.Analysis time within 6 min is suitable for the determination of water-soluble salt anions in large quantities of soil.

关 键 词：离子色谱 土壤水溶盐 无机阴离子 

分 类 号：O657.75[理学—分析化学] TH833[理学—化学]