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目的建立饮用水中消毒副产物(DBP)亚氯酸盐、溴酸盐、氯酸盐的离子色谱检测方法。方法用IonPac23(4×250mm)型阴离子分析柱和(4×50mm)型阴离子保护柱。DS6抑制型电导检测器,抑制器采用ASRS3004mm型,淋洗液浓度:4.5mmol/L Na2CO3~0.8 mmol/L NaHCO3,流速:1.0ml/min。结果本方法线性关系良好(r≥0.999),精密度高,5.0μg/L添加水平相对标准偏差(RSD)<10%。在10.0μg/L、50.0μg/L、150.0μg/L三种浓度添加水平下,平均回收率在96.9%~99.1%之间。亚氯酸盐、溴酸盐、氯酸盐最低检测浓度分别为3.1μg/L、3.0μg/L、3.7μg/L。结论该方法操作简单,灵敏度高,适用于饮用水中亚氯酸盐、溴酸盐、氯酸盐的检测。
Objective To establish a method for the determination of chlorite, bromate and chlorate in disinfection byproducts (DBP) in drinking water. Methods IonPac 23 (4 × 250 mm) anion analytical column and (4 × 50 mm) anion guard column were used. DS6 inhibition conductivity detector with ASRS3004mm suppressor, eluent concentration: 4.5mmol / L Na2CO3 ~ 0.8mmol / L NaHCO3, flow rate: 1.0ml / min. Results The method showed good linearity (r≥0.999), high precision, and relative standard deviation (RSD) of addition of 5.0μg / L <10%. The average recoveries ranged from 96.9% to 99.1% at the concentration of 10.0μg / L, 50.0μg / L and 150.0μg / L. The lowest concentrations of chlorite, bromate and chlorate were 3.1μg / L, 3.0μg / L and 3.7μg / L, respectively. Conclusion The method is simple, sensitive and suitable for the detection of chlorite, bromate and chlorate in drinking water.