离子色谱法测定丁基黄原酸

Determination of butyl xanthate by ion chromatography

对离子色谱电导检测法测定丁基黄原酸的测定步骤进行优化。选用Ion Pac AS20(2 mm×250 mm)阴离子交换色谱柱,以淋洗液自动发生装置产生20 mmol/L的KOH进行等度洗脱,阴离子干扰实验发现常见阴离子不影响丁基黄原酸的测定。优化后的色谱柱温度为30℃,流速为0.25 m L/min,采用电导检测器,在15 min内即可完成丁基黄原酸的测定,所得曲线线性范围是0.002~2 mg/L。在样品测定时讨论不同滤膜的影响,选用混合纤维微孔滤膜,对水源地水质样品添加3个标准质量浓度水平所得回收率范围在95%~110%之间。优化测定后发现该种方法灵敏度高,抗干扰能力强,在水源地水质丁基黄原酸的测定中有一定优势。

This paper discusses the optimization of butyl xanthate determination steps of ion chromatography. Ion Pac AS20(2 mm × 250 mm) column was selected for isocratic elution with20 mmol/L of KOH produced by automatic eluent-generating equipment. The anionic interference experiment showed that common anions did not interfere the determination of butyl xanthate.After optimization, the chromatographic column was 30 degrees centigrade and the flow rate was0.25 m L/min. The butyl xanthate could be measured within 15 min by a conductivity detector and the linear range of the curve obtained was 0.002-2 mg/L. The paper also discusses the influence of different filter membranes on sample determination. The recovery range gained by adding three normal concentrations in source water samples through hybrid fiber micro-filtration membrane was95%-110%. The optimization demonstrated that this method was high in sensitivity,strong in antiinterference capability and had certain advantage of determining the butyl xanthate in source water.