摘要
目的采用离子色谱氢氧根体系技术,优化检测方法建立包装饮用水中痕量溴酸盐的快速检测方法。方法使用氢氧化钾溶液作为淋洗液,采用InpacAS19阴离子柱(4 mm×250 mm),电导检测器检测,在淋洗液起始浓度为9 mmol/L KOH,进行梯度淋洗程序,进样体积为200μl,流速为1.00 ml/min,抑制电流为115 mA,柱温为30℃,池温30℃的条件下进行检测,运行时间18 min,外标法定量。结果溴酸盐线性范围为2.5~30μg/L,相关系数r≥0.999 3,方法检出限为0.51μg/L,定量下限为1.27μg/L,批内精密度为1.21%~3.40%,批间精密度分别为1.51%~4.09%,加标回收率为98%~104%。结论该研究建立的检测方法灵敏度高,进样量少,选择性好,分析时间短,检测结果稳定可靠,满足包装饮用水中痕量溴酸盐检测的要求。
[Objective] To developed an optimal method for the rapid determination of trace bromate in the packaging drinking water by ion chromatography with hydroxide-selective anion-exchange column. [Methods] By using the InpacAS19 column(4 mm×250 mm)with potassium hydroxide(KOH)solution as eluent,the samples were detected by a conductive detector,with the optimal chromatogrphic conditions of 9 mmol/L KOH for gradient elution,injection volume of 200 μl,flow rate of 1.00ml/min,electric current of 115 mA,column temperature of 30 ℃ and pool temperature of 30 ℃,duration of 18 min. The quantitive analysis was performed on the basis of external standard method.[Results]The linear range of bromate was 2.5-30 μg/L and the correlation coefficient was higher than 0.999 3. The detection limit was 0.51 μg/L and the lower limit of quantitation was 1.27 μg/L. The within-run precisions were between 1.21% and 3.40%,while between-run precisions were between 1.51% and 4.82%,and the average recoveries were between 98% and 104%.[Conclusion]The method has high sensitivity,low sample size,good selectivity,short analysis time,and stable and reliable test result,which meet the requirements for determination of trace bromate in the packaging drinking water.
出处
《职业与健康》
CAS
2017年第15期2055-2057,共3页
Occupation and Health
关键词
离子色谱
包装饮用水
溴酸盐
Ion chromatography
Packaging drinking water
Bromate