摘要
利用离子色谱仪同时测定降水中的3种有机酸根离子和4种无机阴离子,通过对分析条件的优化,确定了最佳的色谱条件:以4.0mmol/L Na2CO3与1.0mmol/L NaHCO3为流动相,流速0.8mL/min作等度洗脱,在10min内实现基线分离并完成电导检测.7种组分的检测限在0.5~20.0nmol/L之间,线性范围跨越2个数量级以上.该方法用于雨水样品的分析,结果表明:平均加标回收率为92.1%~106.2%,相对标准偏差0.30%~4.03%.
A method for simultaneous separation and determination of 3 organic acids and 4 anions in rainfall samples by ion chromatography coupled with conductimetric detection was proposed. The 7 analytes were separated by isocratic elution with the mobile phase of 4. 0 mmol/L Na2 CO3 and 1.0 mmol/L NaHCO3 at a flow rate of 0.8 mL/min, and were detected directly by conductimetric detector. Under the optimized conditions, the detection limits for 7 analytes were 0. 5 - 20. 0 nmol/L. The linear ranges were beyond two orders of magnitude. The analytical method had been applied to the determination of 7 anions in rainfall samples. The recovery (92. 1% -106.2% ) and RSD (0. 30% - 4. 03% )results were obtained.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2006年第4期106-108,共3页
Journal of South China Agricultural University
基金
国家"863"项目(2002AA649020)
关键词
离子色谱
降水
阴离子
ion chromatograph
rainfall
anions