| Title: | "Development of an in-line system for the analysis of 4,4'-DDT in water" |
| Author(s): | Peeraprasompong P; Thavarungkul P; Kanatharana P; |
| Address: | "Analytical and Environmental Chemistry/Trace Analysis Research Unit, Department of Chemistry, Prince of Songkla University, Songkhla, Thailand" |
| DOI: | 10.1080/03601230600805824 |
| ISSN/ISBN: | 0360-1234 (Print) 0360-1234 (Linking) |
| Abstract: | "An in-line system for trace persistent organic pollutants (POPs) in water was developed by using a laboratory-made hollow fiber membrane (HFM) unit connected with a high-resolution gas chromatograph-mass spectrometer (HRGC-MS). The semivolatile organic compound, 4,4'-Dichlorodiphenyl trichloroethane (4,4'-DDT), was chosen as a representative of a persistent organic compound. The synthetic water contaminated with 4,4'-DDT was passed through the HFM unit, the extraction occurred by the analyte pervaporated and permeated, then stripped into HRGC-MS. Several factors were investigated for the high extraction efficiency. The best performance was obtained at sample and stripping gas flow rates of 6 and 9 mLmin-1, respectively, and desorption temperature of 60 degrees C. At this temperature, the diffusion rate was enhanced by 15 times over 25 degrees C. A wide linear dynamic range was obtained, i.e., 0.10-1.0 mgL-1, with a limit of detection (LOD) of 90 microgL-1. The extraction efficiency of 4,4'-DDT in real water samples was in the range of 83-94%. Real water samples were analyzed and 0.6 microgL-1 of 4,4'-DDT was found in unregistered bottled water and 7.0 microgL-1 in tap water" |
| Keywords: | "Adsorption DDT/*analysis Gas Chromatography-Mass Spectrometry/*methods/standards Membranes, Artificial Pesticides/*analysis Reproducibility of Results Sensitivity and Specificity Temperature Volatilization Water Pollutants, Chemical/*analysis;" |
| Notes: | "MedlinePeeraprasompong, Pensiri Thavarungkul, Panote Kanatharana, Proespichaya eng Research Support, Non-U.S. Gov't England 2006/08/09 J Environ Sci Health B. 2006; 41(6):807-19. doi: 10.1080/03601230600805824" |
