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Determination of nine benzotriazole UV stabilizers in environmental water samples by automated on-line solid phase extraction coupled with high-performance liquid chromatography-tandem mass spectrometry

机译：自动化在线固相萃取-高效液相色谱-串联质谱法测定环境水样中的九种苯并三唑紫外线稳定剂

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摘要

A method using automated on-line solid phase extraction coupled with a high-performance liquid chromatography-tandem mass spectrometry system was developed for the determination of emerging benzotriazole UV stabilizers (BZTs) in different environmental water matrices including river water, sewage influent and effluent. Water sample was injected directly and the analytes were preconcentrated on a Polar Advantage II on-line SPE cartridge. After cleanup step the target BZTs were eluted in back flush mode and then separated on a liquid chromatography column. Experimental parameters such as sample loading flow rate, SPE cartridge, pH value and methanol ratio in the sample were optimized in detail. The method detection limits ranged from 0.21 to 2.17 ng/L. Recoveries of the target BZTs at 50 ng/L spiking level ranged from 76% to 114% and the inter-day RSDs ranged from 1% to 15%. The optimized method was successfully applied to analyze twelve water samples collected from different wastewater treatment plants and rivers, and five BZTs (UV-P, UV-329, UV-350, UV-234 and UV-328) were detected with concentrations up to 37.1 ng/L The proposed method is simple, sensitive and suitable for simultaneous analysis and monitoring of BZTs in water samples. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.
机译：建立了一种使用自动在线固相萃取结合高性能液相色谱-串联质谱系统的方法，用于测定不同环境水矩阵（包括河水，污水进水和污水）中新兴的苯并三唑紫外线稳定剂（BZT）。水样品直接注入，分析物在Polar Advantage II在线SPE柱上进行预浓缩。纯化步骤后，目标BZT以反冲洗模式洗脱，然后在液相色谱柱上分离。详细优化了样品加载流速，SPE柱，pH值和甲醇比例等实验参数。方法检测限为0.21至2.17 ng / L。 50 ng / L峰值水平下目标BZT的回收率范围为76％至114％，日间RSD范围为1％至15％。该优化方法成功地用于分析从不同废水处理厂和河流收集的十二个水样，并检测了五种BZT（UV-P，UV-329，UV-350，UV-234和UV-328），其浓度最高为37.1 ng / L所提出的方法简单，灵敏，适合同时分析和监测水样中的BZT。 （C）2013作者。由Elsevier B.V.发布。保留所有权利。

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