Supported Ionic Liquid Solid Phase Extraction Coupled to Electrochemical Detection for Determination of Trace Bisphenol A
10.11895/j.issn.0253-3820.140803
- VernacularTitle:固定化离子液体固相萃取-电化学联用测定痕量双酚A
- Author:
Liangliang HUANG
;
Yan HUANG
;
Yankai CHEN
;
Yunhua DING
;
Weifeng ZHANG
;
Xiaojing LI
;
Xiaoping WU
- Publication Type:Journal Article
- Keywords:
Supported ionic liquids;
Solid phase extraction;
Ionic liquid-based carbon paste electrode;
Bisphenol A;
Electrochemical detection
- From:
Chinese Journal of Analytical Chemistry
2015;(3):313-318
- CountryChina
- Language:Chinese
-
Abstract:
A simple and green method for the determination of trace bisphenol A( BPA) was established by coupling supported ionic liquid solid phase extraction to β-cyclodextrin modified ionic liquid carbon paste electrode-based electrochemical detection ( SILs-SPE-ED) . The synthesized imidazolium ionic liquid modified styrene type macroporous resin was used as adsorbent for SPE of BPA. The critical parameters that affect the extraction efficiency were optimized, including 0. 4 g of packing material quantity, 200 mL of sample solution at pH 7. 0, 5 mL of methanol as an eluent solvent, and 4. 5 mL/min of the SPE flow rate. Dynamic adsorption test showed that the maximum adsorption capacity of BPA on the SILs-SPE cartridge was 10. 1 mg/g, and the enrichment factor was 40 . The calibration curve showed a good linearity between the anodic current and the BPA concentration in the range of 1. 0×10-8-1. 0×10-6 mol/L (i. e. 2. 3-228μg/L). The detection limit was 4. 16×10-9 mol/L (equal to 0. 95 μg/L). The SILs-SPE-ED method was applied to the analysis of water and plastic samples and the results agreed well with HPLC method.
