Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1244717 | Talanta | 2010 | 5 Pages |
Abstract
A novel method for electrically assisted microextraction coupled to liquid chromatography-mass spectrometry was evaluated for determination of trace levels of parathion in water. A pencil lead electrode was used in a di-electrode system to extract parathion onto the electrode surface with a reductive potential applied. The optimum extraction conditions were found to be a potential of â600Â mV for 60Â s in pH 2 phosphate buffer solution. The parathion was desorbed statically for 1Â min and dynamically for 3Â min in the commercial SPME-HPLC desorption chamber, then analyzed with LC-APCI-MS/MS. The detection limit (LOD) for parathion in water was found to be 0.3Â ng/mL. The proposed technique was demonstrated to be fast, sensitive and not require a solvent sample pretreatment.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Tzung-Jie Yang, Maw-Rong Lee,