固相萃取/高效液相色谱法同时测定水中4种直链烷基苯磺酸钠  

Simultaneous Determination of Four Kinds of Linear Alkyl Benzene Sulfonates by Solid Phase Extraction/High Performance Liquid Chromatography

作　　者：周围[1,2] 解迎双[2] 王波[1] 贾松涛[3] 牛洪亮[3] 

机构地区：[1]甘肃出入境检验检疫局中心实验室,甘肃兰州730020 [2]西北师范大学地理与环境科学学院,甘肃兰州730070 [3]甘肃农业大学食品科学与工程学院,甘肃兰州730070

出　　处：《分析测试学报》2011年第1期95-98,共4页Journal of Instrumental Analysis

摘　　要：建立了水中4种直链烷基苯磺酸钠的固相萃取／高效液相色谱的测定方法。样品经高速冷冻离心，用MAX复合阴离子交换小柱净化富集后直接进样。在以乙腈-100mmol／L乙酸铵（体积比73：27）为流动相，流速1mL／min，柱温30℃，检测波长225nm，进样体积10灿的条件下，4种直链烷基苯磺酸钠得到很好的分离。在优化实验条件下，十一烷基苯磺酸钠与十三烷基苯磺酸钠的线性范围为10～50mg／L，检出限为10mg／L，十二烷基苯磺酸钠与十四烷基苯磺酸钠的线性范围为5～25mg／L，检出限为5mg／L；加标回收率为86％～98％；相对标准偏差为2．9％～7．4％。A solid phase extraction coupled with high performance liquid chromatographic （SPE/ HPLC） method was established for the determination of 4 kinds of sodium n-alkyl benzene sulfonates in water. The samples were refrigerated and centrifuged, then purified and enriched with MAX com- plex anion exchange column. Four sodium n-alkyl benzene sulfonates were successfully separated by HPLC using acetonitrile- 100 mmoL/L ammonium acetate （73 ： 27, by volume） as mobile phase with a flow rate of 1 mL/min, column temperature of 30℃, detection wavelength of 225 nm and injection volume of 10 μL. Under the optimal conditions, the calibration curves were linear in the range of 10 -50 mg/L for sodium undecylbenzene snlfonte and sodium N-tridecylbenzene sulfonate with detection limits of 10mag/L, and 5 - 25 mg/L for sodium dodecylbenzene sulphonate and sodium tetradecylbenzene sulfonate with detection limits of 5 mg/L. The spiked recoveries were in the range of 86% - 98% with relative standard deviations（RSDs） of 2.9% - 7.4% .

关 键 词：高效液相色谱 固相萃取 直链烷基苯磺酸钠 

分 类 号：O657.72[理学—分析化学] TQ423[理学—化学]