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Determination of Odor Compounds by Using Headspace Solid-Phase Micro Extraction Combined with GC-MS

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4 Author(s)
Yan Zhang ; Key Lab. of Beijing for Water Quality Sci. & Water Environ. Restoration, Beijing Univ. of Technol., Beijing, China ; Jiao Chen ; Yanling Yang ; Xing Li

Geosmin (GSM) and 2-methyl isoboneol(2-MIB) are the major compounds causing the odor of water body. A new method for the qualitative and quantitative analysis of GSM and 2-MIB, which isolated and enriched the odor compounds from the water samples by using Headspace solid-phase micro extraction (HS-SPME), and detected the two substances using GC/MS with internal standard method, was developed. The optimal conditions of HS-SPME for GSM and 2-MIB were as follow: extracting for 40minute, extracting at 65°C, and adding NaCl 0.1g. The temperature program for column of GC was first maintained at 50 °C for 1 minute, then rose to 100 °C at the rate of 10°C per minute keeping for 0.15minute, finally rose to 240°C by 5°C per minute. Under these conditions, the separate detection limits of GSM and 2-MIB were obtained with 0.2ng / L and 0.5ng / L. The relative standard deviations were 5.37% and 5.56% respectively. This method applied for measuring the actual water samples of Longtan Lake and Taihu Lake in December. The former contained 1.26ng/L of GSM and 1.074ng/L of 2-MIB, while the latter included 2.681ng/L of GSM and 3.392ng/L of 2-MIB.

Published in:

E-Product E-Service and E-Entertainment (ICEEE), 2010 International Conference on

Date of Conference:

7-9 Nov. 2010

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