科研之友
微信
新浪微博
Facebook
分享链接
摘要
A novel solid-phase extraction (SPE) system, based on a new sorbent of Nylon6/Polypyrrole (PA6/PPy) core-shell nanofibres mat and a new packing format of SPE disks, is presented in this paper. A series of related parameters that may affect the efficiency, such as the kind of eluent and its volume, the amount of nanofibres mat, ionic strength, pH of the sample, flow rate of the sample and volume of the sample, have been investigated systematically. Under the optimised conditions, the target analyte in 10mL water samples can be completely extracted by a 3.0mg PA6/PPy nanofibres mat and easily eluted by 400 mu L acetonitrile. Around 20 mu L elution was injected directly to HPLC-UV for determination, without further concentration. Besides, the nanofibres mat could be repeatedly used up to six cycles. Satisfactory linearity was achieved in the range of 0.1-40.0ng/mL with a correlation coefficient of 0.9999. The limit of detection (LOD) (3S/N) was 0.03ng/mL, which could meet the determination requirements of atrazine as per the European Union legislation, US. Safe Drinking Water Act and the State Environmental Protection Administration of China. The simple, effective and economic method was proposed for the determination of atrazine in environmental water at trace level. The recoveries ranged from 94.73 to 114.92%, with relative standard deviations (RSDs) of 2.5-4.2%, and were obtained from tap water and lake water samples with atrazine at 2.0ng/mL, suggesting the actual feasibility of the proposed method in environmental water samples.
- 出版日期2015-9-26
- 单位东南大学
