采用水蒸气蒸馏法分离硫化精矿样品中氟离子和氯离子,离子色谱法测定了氟离子和氯离子的含量。经AG19保护柱及AS19分离柱分离,以25.00 mmol·L-1氢氧化钠溶液为淋洗液,采用连续自动再生化学抑制器检测。F-和Cl-的质量浓度均在10.00 mg·L-1以内与峰面积呈线性关系,检出限(3s)分别为0.006,0.003 mg·L-1。方法用于分析硫化铜精矿、锌精矿和铅精矿,氟离子和氯离子的加标回收率在94.1%~97.2%,96.4%~101%之间,相对标准偏差(n=11)分别在1.5%~2.3%,1.1%~1.9%之间。

Fluoride and Cl- ion in sulfide concentrate were separated by steam distillation, and their contents in the distillate were determined by ion chromatography. AG19 protective column and AS19 separation column were used for separation and 25.00 mmol·L-1 NaOH solution was used as eluant. Successive-auto regenerative chemical suppressor was adopted in the determination. Linear relationships between values of peak area and mass concentration of F- and Cl- were kept in the same range within 10.00 mg·L-1, with detection limits (3s) of 0.006 mg·L-1 for F- and 0.003 mg·L-1 for Cl-. The proposed method was used for the analysis of samples of copper sulfide concentrate, zinc concentrate and lead concentrate, giving values of recovery and RSD′s (n=11) in ranges of 94.1%-97.2% and 1.5%-2.3% for F-, 96.4%-101% and 1.1%-1.9% for Cl- respectively.