n Journal of Emerging Trends in Engineering and Applied Sciences - Trace determination of phthalates in ground water samples by GC-MS using specific sample concentration techniques

Volume 7, Issue 3
  • ISSN : 2141-7016
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Dimethyl-Phthalate, Diethyl-Phthalate, Di-n-Butyl-Phthalate, Benzyl Butyl-Phthalate, Bis (2-Ethylhexyl)-Phthalate and Di-n-Octyl-Phthalate were extracted in water samples collected from the City of Zurich, Switzerland by GC-MS using Specific Sample Concentration Techniques. This study is aimed at developing a simple and applicable method/technique for the trace determination of Phthalates in ground water with a low or possibly zeros background interference. Possible source of contaminations in all the analytical and pre-analytical steps were investigated giving preference to a specific sample concentration technique (liquid-liquid extraction) while focused on reducing the limit of detection to 0.1µg/l using GC/MS in the trace analysis of Phthalate in ground water. Systematic cleanup of reagents and glassware were carried out to eliminate background phthalate that were not derived from the sample. Also the contaminations and interference on the chromatogram emanating from the injector unit were also studied leading to effective injector maintenance. Results from this study reveal that the desired low limit of detection (0.1µg/l) were achieved and validated successfully using this method. This study also reveals the drastic reduction of interference and contaminants during sample collection, preservation, extraction and concentration of Phthalate Samples is possible without having to build an exclusive plastic free or all metal laboratories for the analysis of Phthalate. While it is necessary to develop and optimize a method using specific sample concentration techniques for the extraction and analysis of Phthalates with the possibility of making accurate measurements with low detection limits, data's from this study reveals that this method could be routinely used to analyse and obtain precise quantitative results in any modern laboratory.

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