Determination of nonylphenol ethoxylates in the aquatic environment by normal phase liquid chromatography-electrospray mass spectrometry

被引:38
作者
Shao, B
Hu, JY [1 ]
Yang, M
机构
[1] Peking Univ, Dept Urban & Environm Sci, Beijing 100871, Peoples R China
[2] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
基金
中国国家自然科学基金;
关键词
water analysis; nonylphenol ethoxylates; surfactants;
D O I
10.1016/S0021-9673(02)00011-0
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A comprehensive analytical method based on normal-phase liquid chromatography-electrospray ionization mass spectrometry (NPLC-ESI-MS) has been established for determination of nonylphenol ethoxylates (NPEOs) in the aquatic environment. Extraction and cleanup of samples were performed on graphitized carbon black (GCB) solid-phase extraction cartridges. Complete separation between each individual NPEOs was achieved by combining a C-18 pre-column with a silica analytical column and using acetonitrile-water as eluent. Quantitative determination by LC-ESI-MS was achieved in the positive ionization (PI) mode at a ramped cone voltage for NPEOs using selected ion monitoring. Recoveries for NPEOs ranged between 91.9 and 117.5%, and the limits of detection varied between 0.5 and 2 ng/l for individual NPEOs with n longer than 2, and between 5 and 0.5 mug/l for NP1EO and NP2EO. This method was successfully applied to the investigation of residual NPEOs with n>2 in the Chongqing area of the Changjiang river. NPEOs with n ranging from 1 to 22 were found to vary between 0.1 and 2900 ng/l with a distribution depending on the depth of water. (C) 2002 Elsevier Science B V All rights reserved.
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页码:167 / 174
页数:8
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