离子色谱抑制电导法测定铜氨浸出液中氯离子

来源期刊：冶金分析2010年第12期

论文作者：张明星 李华昌 于力 汤淑芳

文章页码：44 - 47

关键词：铜氨浸出液； 氯离子； 离子色谱

Key words：cuprammonium leaching solution； chloride； ion chromatography (IC)

摘    要：研究了一种离子色谱抑制电导法测定冶金浸出液中氯离子的方法。以SH-AC-1型阴离子分离柱(10μm,4.6 mm×250 mm)为色谱柱,2.5 mmol/L碳酸钠+3.5 mmol/L碳酸氢钠的混合溶液为淋洗液,在柱温为25℃,流速为2.0 mL/min,进样量为100μL的条件下进行检测,氯离子检出限为0.51μg/L,线性范围为0.002～15.0 mg/L,线性方程为Y=1.2×10⁶X-1.1×10⁵(Y:峰面积;X:质量浓度mg/L),线性相关系数为0.999 8。将本方法应用于铜氨浸出液中氯离子的测定,相对标准偏差(n=11)为6.9%,加标回收率为104%。

Abstract: A determination method of chloride in metallurgical leaching solution was investigated by ion chromatography with suppressor conductivity detection .Using SH-AC-1 anion-exchange column(10 μm,4.6 mm×250 mm) as stationary phase and the mixed solution of 2.5 mmol/L of Na₂CO₃ and 3.5 mmol/L of NaHCO3 as leacheate,the determination was conducted at column temperature of 25 ℃,flow rate of 2.0 mL/min and sampling injection volume of 100 μL.The detection limit of chloride was 0.51 μg/L.The linear range was 0.002-15.0 mg/L for chloride.The linear equation was Y=1.2×10⁶X-1.1×10⁵(Y: peak area;X: mass concentration,mg/L) with linear correlation coefficient of 0.999 8.This method has been used in the determination of chloride in cuprammonium leaching solution with relative standard deviation(RSD,n=11) of 6.9% and recoveries of 104%.