| Title: | Development of a screening method for the analysis of organic pollutants in water using dual stir bar sorptive extraction-thermal desorption-gas chromatography-mass spectrometry |
| Author(s): | Tolgyessy P; Vrana B; Krascsenits Z; |
| Address: | "Water Research Institute, Slovak National Water Reference Laboratory, Nabrezie arm. gen. L. Svobodu 5, 812 49 Bratislava, Slovak Republic. Tolgyessy@vuvh.sk" |
| DOI: | 10.1016/j.talanta.2011.09.055 |
| ISSN/ISBN: | 1873-3573 (Electronic) 0039-9140 (Linking) |
| Abstract: | "The development of a method for screening of organic compounds with a wide range of physico-chemical properties in water, based on dual stir bar sorptive extraction coupled with thermal desorption and gas chromatography-mass spectrometry (dual SBSE-TD-GC-MS) is described. The investigated water sample is divided into two aliquots and extracted with stir bar sorptive extraction at two different conditions: using addition of methanol or sodium chloride, respectively. Following extraction, the two stir bars are inserted into the same glass thermal desorption liner and are simultaneously desorbed and analysed by GC-MS. The method optimisation was performed using 45 environmentally harmful substances with different volatilities (boiling point from 193 to 495 degrees C), polarity (logK(ow) from 2.17 to 8.54) and acido-basic properties. The majority of model compounds was selected from the EU list of priority substances in the field of water policy and from the US EPA method 625, respectively. Optimisation was performed for extraction parameters (sample volume, extraction time, stirring rate, addition of modifiers) as well as for the thermal desorption conditions (desorption flow, desorption time, cryofocusing temperature). Performance characteristics (recovery, repeatability, carryover, linearity, limits of detection and quantification) were determined for the optimised method. An example of analysis of a contaminated groundwater sample is presented" |
| Keywords: | "Adsorption Chemical Fractionation/*methods Gas Chromatography-Mass Spectrometry/*methods Groundwater/*analysis Organic Chemicals/analysis/*isolation & purification Reproducibility of Results Sensitivity and Specificity Temperature Water Pollutants, Chemic;" |
| Notes: | "MedlineTolgyessy, Peter Vrana, Branislav Krascsenits, Zoltan eng Evaluation Study Netherlands 2011/11/22 Talanta. 2011 Dec 15; 87:152-60. doi: 10.1016/j.talanta.2011.09.055. Epub 2011 Oct 1" |
