高效液相色谱-电感耦合等离子体质谱法分析天然矿泉水中溴形态  

Analysis of Bromine Speciation in Natural Mineral Water by Inductively Coupled Plasma Mass Spectrometry with High Performance Liquid Chromatography

作　　者：张浩 任硕 霍忆慧 许晓薇 吴池莹 伊雄海 樊祥 ZHANG Hao;REN Shuo;HUO Yihui;XU Xiaowei;WU Chiying;YI Xionghai;FAN Xiang(Shanghai Customs Animal,Plant and Food Inspection and Quarantine Technical Center,Shanghai 200135,China)

机构地区：[1]上海海关动植物与食品检验检疫技术中心,上海200135

出　　处：《中国无机分析化学》2024年第11期1492-1497,共6页Chinese Journal of Inorganic Analytical Chemistry

基　　金：上海市技术标准专项项目(21DZ2208500)。

摘　　要：建立了高效液相色谱-电感耦合等离子体质谱法分析天然矿泉水中溴元素形态的方法,并通过电感耦合等离子体质谱法测定其总溴含量。普通矿泉水不需处理、气泡矿泉水进行超声脱气,流动相选择36 mmol/L硝酸+67 mmol/L氨水,经高效液相色谱-阴离子色谱柱分离,通过ICP-MS进行检测。结果显示:溴形态的分析方法中,溴酸根的回收率为84.0%~104%,相对标准偏差是2.7%~4.2%;溴离子回收率为89.0%~102%,相对标准偏差(RSD)是2.3%~5.1%,定量限2.0μg/L;总溴含量检测方法中,总溴的回收率93.2%~97.2%,RSD为3.1%~5.8%,定量限2.0μg/L。对上海口岸进口的天然矿泉水进行溴酸根和溴离子含量筛查,并对天然矿泉水中溴酸盐产生过程进行探讨。方法的样品前处理条件简单、灵敏度高、重现性好,保持了溴元素原始形态不变,适合天然矿泉水中溴形态分析,为进口天然矿泉水的质量控制与风险监测提供技术支持。In this article,a method was established to analyze bromine in natural mineral water by high performance liquid chromatography-inductively coupled plasma mass spectrometry(HPLC-ICP-MS),and the total bromine content was determined by inductively coupled plasma mass spectrometry(ICP-MS).Ordinary mineral water did not require treatment,while sparkling mineral water was degassed by ultrasonication.The mobile phase was selected as 36 mmol/L nitric acid and 67 mmol/L ammonia,which was separated by HPLC with anion chromatography column and detected by ICP-MS.The results showed that the recoveries of bromate were 84.0%-104% with the relative standard deviations(RSDs) of 2.7%-4.2%,and the recoveries of bromide ions were 89.0%-102% with the relative standard deviations(RSDs) of 2.3%-5.1%.The limit of quantification(LOQ) was 2.0 g/L.In the detection method of the total bromine content,the recovery of total bromine were 93.2%-97.2% with the RSDs of 3.1%-5.8%,and the LOQ was 2.0 g/L.The method in this study was adopted to screen the bromate and bromide ions contents of natural mineral water imported from Shanghai port,and to elaborate the process of bromate generation in natural mineral water.The method has simple sample pretreatment conditions,high sensitivity and good reproducibility,and keeps the original form of bromine element unchanged,which is suitable for the analysis of bromine form in natural mineral water,and provides technical support for the quality control and risk monitoring of imported natural mineral water.

关 键 词：天然矿泉水 溴酸根 溴离子 溴形态 高效液相色谱-电感耦合等离子体质谱法 

分 类 号：O657.63[理学—分析化学] TS207.3[理学—化学]