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液液萃取-气质联用法检测水中IPMP与IBMP 被引量:5

Determination of IPMP and IBMP in Water with Liquid-liquid Extraction by Gas Chromatography-mass Spectrometry
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摘要 对液液萃取(LLE)-气相色谱质谱(GC/MS)法测定饮用水中异嗅物质2-甲氧基-3-异丙基吡嗪(2-methoxy-3-3isopropyl pyrazine,IPMP)及2-甲氧基-3-异丁基吡嗪(2-methoxy-3-3isobutyl pyrazine,IBMP)的方法进行了探讨,确定了最佳萃取条件,萃取时间为4 min,NaCl加入量为60 g.L-1,pH值为4左右.在选定条件下,IPMP和IBMP在20~500μg.L-1的范围内具有良好的线性关系,相关系数r〉0.995;方法回收率为72.0%~103.6%;相对标准偏差RSD〈8%. An analytical method used for the detection of odorants——2-methoxy-3-3isopropyl pyrazine(IPMP) and 2-methoxy-3-3isobutyl pyrazine(IBMP) in drinking water with liquid-liquid extraction(LLE) by gas chromatography-mass spectrometry(GC/MS)was developed.The LLE was carried out in a solution of pH 4 with a dosage of 0.2 and 60 g·L-1NaCl,respectively.The extraction lasted for 4 min.Good relativity(r0.995 4) was obtained when the linear range was 20~500 μg·L-1.The recoveries of IPMP and IBMP were 72.0%~103.6%.The relative standard deviations were less than 8%.
出处 《同济大学学报(自然科学版)》 EI CAS CSCD 北大核心 2011年第8期1177-1180,1192,共5页 Journal of Tongji University:Natural Science
基金 国家科技重大专项(2008ZX07421-002 2008ZX07421-004) 国家"八六三"高技术研究发展计划(2008AA06A412)
关键词 液液萃取 气相色谱-质谱 异嗅物质 2-甲氧基-3-异丙基吡嗪 2-甲氧基-3-异丁基吡嗪 liquid-liquid extraction gas chromatography-mass spectrometry odorants 2-methoxy-3-3isopropyl pyrazine 2-methoxy-3-3isobutyl pyrazine
作者简介 第一作者:安娜(1979-),女,讲师,博士生,主要研究方向为饮用水深度处理.E-mail:anna@tongi.edu.cn 通讯作者:高乃云(1950-),女,教授,博士生导师,工学博士,主要研究方向为水处理理论与技术.E—mail:tjgaonaiyun@126.com
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