摘要
本研究报道了一种水质一体化检测的技术,该技术运用了离子色谱技术,能够一次性鉴别并量化水中的5种关键阴离子——包括高氯酸盐、氟化物、氯化物、硝酸盐及硫酸盐,同时亦能精确捕捉5种常见的消毒副产物——溴酸盐、亚氯酸盐、氯酸盐、二氯乙酸及三氯乙酸,此外,还具备检测环境污染物草甘膦的能力,总计覆盖了11种重要化学物质。以氢氧化钾(KOH)溶液为淋洗液进行梯度洗脱,在流速1 m L·min^(-1),柱温25℃,进样量500μL的条件下,约45 min内实现所有被测化学物质分离。11种化学物质分离度良好,相关系数均≥0.999,方法检出限为0.4μg·L^(-1)~30.9μg·L^(-1)。加标实验结果表明,11种化学物质的平均回收率范围为94.25%~105.76%,相对标准偏差0.08%~4.94%。这一创新方法不仅提升了水质监测的效率与准确性,还为保障饮用水安全提供了强有力的技术支持。
An efficient method using ion chromatography has been developed for the simultaneous determination of 11 types of chemicals in drinking water,including 5 types of anions (perchlorate,fluoride,chloride,nitrate,sulfate),5 types of disinfection by-products (bromate,chlorite,chlorate,dichloroacetic acid,trichloroacetic acid),and glyphosate.Gradient elution was performed using potassium hydroxide (KOH) solution as the eluent.Under the conditions of a flow rate of1 m L·min^(-1),column temperature of 25℃,and injection volume of 500μL,all chemicals tested were separated in about 45 minutes.The separation degree of 11 types of chemical substances is good,and the correlation coefficients are with a value of 0.999 or above.The lower and upper limits of detection for this method range from0.4μg·L^(-1) to 30.9μg·L^(-1).The results of the spiked experiment showed that the average recovery rate of the 11 types of chemical substances ranged from 94.25%to105.76%,with a relative standard deviation of 0.08%to 4.94%.This innovative approach not only improves the efficiency and accuracy of water quality monitoring,but also provides strong technical support for safeguarding the safety of drinking water.
作者
郑瑜
Zheng Yu(Putian Water Quality Testing Co.,Ltd.,Putian 351100,China)
出处
《广东化工》
CAS
2024年第21期149-151,共3页
Guangdong Chemical Industry
关键词
水质一体化检测技术
离子色谱法
梯度洗脱
水质监测
Integrated detection technology of water quality
ion chromatography
gradient elution
water quality monitoring
