ZENG Li-lan,LEI Ping,WANG Wei-kang.Online Generation Ion Chromatography for Determination of Nine Indicators Such as Iodide in Water[J].China Water & Wastewater,2022,38(18):134-138.
在线发生离子色谱法检测水中碘化物等9种指标
- Title:
- Online Generation Ion Chromatography for Determination of Nine Indicators Such as Iodide in Water
- Keywords:
- drinking water sources; drinking water; ion chromatography; iodide; glyphosate; perchlorate
- 摘要:
- 针对供水行业高氯酸盐、碘化物等指标检测需求，开发了可在20 min内检测碘化物、草甘膦、高氯酸盐、溴化物、氟化物、氯化物、硝酸盐氮、硫酸盐和磷酸盐等9种化合物的淋洗液在线发生离子色谱方法。碘化物、草甘膦、高氯酸盐、溴化物检出限分别达到0.002、0.005、0.001、0.004 mg/L，其余5种化合物检出限均满足相关标准要求。在各指标定量限水平的平均加标回收率达到96.3%~104%，相对标准偏差为0.68%~3.79%。该方法简单、灵敏度高，可实现对饮用水和水源水多指标的高效分析。应用该方法对南方某市水源水相关指标进行检测的结果表明，碘化物和溴化物在水源水中普遍检出，平均含量分别为0.028 mg/L和0.037 mg/L，个别水库达到高碘水平；高氯酸盐和草甘膦均未检出；氟化物、氯化物、硝酸盐氮、硫酸盐等指标均满足地表水Ⅱ类标准。对50个水厂出厂水水样进行检测，碘化物、高氯酸盐、草甘膦、溴化物和磷酸盐均未检出，其他指标符合生活饮用水水质要求。建议关注水厂供水工艺的碘代和溴代消毒副产物风险。
- Abstract:
- To meet the requirements of perchlorate and iodide detection in water supply industry, an online generation ion chromatography method was developed for the detection of nine compounds such as iodide, glyphosate, perchlorate, bromide, fluoride, chloride, nitrate nitrogen, sulfate and phosphate in 20 min. The detection limits of iodide, glyphosate, perchlorate, bromide were 0.002 mg/L, 0.005 mg/L, 0.001 mg/L and 0.004 mg/L, respectively, and those of other five compounds met the requirements of relevant standards. At the quantitative limit level，the average recoveries were 96.3%-104% and the relative standard deviations were 0.68%-3.79%. The method is simple and sensitive, and can be applied to analyze drinking water and source water efficiently. The method was applied to detect the relevant indexes of source water in a city in south China. Iodide and bromide were widely detected in the source water with average concentrations of 0.028 mg/L and 0.037 mg/L, respectively, and high iodine concentration was detected in particular reservoir. Perchlorate and glyphosate were not detected. Fluoride, chloride, nitrate nitrogen, sulfate and other indicators met the limitations specified in surface water class Ⅱ standard. Water samples from 50 waterworks were tested. Iodide, perchlorate, glyphosate, bromide and phosphate were not detected, and other indicators met the requirements specified in drinking water quality standard. It is suggested to pay attention to the risk of iodine and bromine disinfection byproducts in water supply process.
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