Abstract
For the first time, haloacetic acids and aromatic acetic acids were extracted from wastewater samples using electromembrane extraction (EME). A thin layer of toluene immobilized on the walls of a polypropylene membrane envelope served as an artificial supported liquid membrane (SLM). The haloacetic acids (HAAs) (chloroacetic acid, dichloroacetic acid, and trifluoroacetic acid) and aromatic acetic acids (phenylacetic acid and p-hydroxyphenylacetic acid) were extracted through the SLM and into an alkalized aqueous buffer solution. The buffer solution was located inside the membrane envelope. The electrical potential difference sustained over the membrane acted as the driving force for the transport of haloacetic acids into the membrane by electrokinetic migration. After extraction, the extracts were analyzed by high-performance liquid chromatography-ultraviolet detection. The detection limits were between 0.072 and 40.3 ng L-1. The calibration plot linearity was in the range of 5 and 200 μg L-1 while the correlation coefficients for the analytes ranged from 0.9932 to 0.9967. Relative recoveries were in the range of 87-106%. The extraction efficiency was found to be comparable to that of solid-phase extraction.
| Original language | English |
|---|---|
| Pages (from-to) | 109-113 |
| Number of pages | 5 |
| Journal | Talanta |
| Volume | 86 |
| Issue number | 1 |
| DOIs | |
| State | Published - 30 Oct 2011 |
Bibliographical note
Funding Information:The authors gratefully acknowledge the financial support of this research by the National University of Singapore and the Environmental Water Industry Development Council (grant no 143-000-438-272) KA and CB would like to thank the Deanship of Scientific Research at KFUPM for the NUS summer assignment.
Keywords
- Disinfection by-products
- Electromembrane extraction
- Environnemental analysis
- Microextraction
- Polar analytes
ASJC Scopus subject areas
- Analytical Chemistry