Determination of the Odorous Compounds in the Source of Drinking Water by Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry

Abstract:

A simple, rapid, sensitive and high-efficiency method for determ-ination of odorous compounds such as 2-methylisobomeol (2-MIB) and trans-1,10-dimethyl-trans-9-decalol (Geosmin) in the source of drinking water was developed by solid-phase microe- xtraction(SPME) followed by gas chromatography-mass spectrometry(GC-MS). In this study, various of SPME conditions have been optimized in detail. The results show that DVB/CAR/ PDMS fiber was found to possess the best extraction efficiency for the odorous compounds in water. SPME was carried out by using 25mL samples, addition of 6 g NaCl, stirring at 1150 rpm and temperature at 80°C for 15 min to enrich the target analytes. After that, the fiber was desorbed at 250°C for 2min and determined by GC-MS. 2-MIB and GSM were separated within 15 min using a HP-5MS capillary column and detected in the selective ion monitoring mode. The optimized method has been proved with excellent linearity and precision. Using this method, the calibration curves of 2-MIB and GSM were linear in the range of 10-500 ng/L, and the correlation coefficients were both above 0.9984. The detection limits (S/N=3) of 2-MIB and GSM were 1.2 and 0.9 ng/L, respectively. The optimized SPME was proved to be a very practical method for determination of the trace odorous compounds in the source of drinking water and applied with satisfactory results.

• Periodical: Advanced Materials Research (Volumes 356-360)
• Pages: 951-954
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.356-360.951
• Online since: October 2011
• Authors: Na Xu, Jing Liu, Jian Guang Liu, Nan Wang, Feng Lu
• Keywords: 2-Methylisoborneol, Gas Chromatography-Mass Spectrometry (GC-MS), Geosmin, Solid-Phase Microextraction, Source of Drinking Water

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