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ISSN: 2157-7587

Hydrology: Current Research
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Trace Analysis of Taste-Odor Compounds in Water by Salt-Free Purgeand-Trap Sampling with GC-MS Detection

Thavrin Manickum1*, Wilson John1 and Mncedisi Philip Malungana2
1Scientific Services Laboratories, Engineering & Scientific Services, Head Office, Level 3, Umgeni Water, 310 Burger Street, Pietermaritzburg 3201, Kwa Zulu-Natal, South Africa
2Water and Environmental Services, Engineering & Scientific Services, Head Office, Level 2, Umgeni Water, 310 Burger Street, Pietermaritzburg 3201, KwaZulu-Natal, South Africa
Corresponding Author : Dr. Thavrin Manickum
Scientific Services Laboratories
Engineering & Scientific Services
Head Office, Level 3
Umgeni Water, 310 Burger Street
Pietermaritzburg 3201
KwaZulu-Natal, South Africa
Tel: +27 33 341 1067
Fax: +27 33 341 1501
E-mail: [email protected]
Received August 09, 2011; Accepted October 19, 2011; Published October 29, 2011
Citation: Manickum T, John W, Malungana MP (2011) Trace Analysis of Taste-Odor Compounds in Water by "Salt-Free" Purge-and-Trap Sampling with GC-MS Detection . Hydrol Current Res 2:121. doi: 10.4172/2157-7587.1000121
Copyright: © 2011 Manickum T, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

A novel, fully validated, purge-and-trap sampling method, with gas chromatography-mass spectrometric detection for simultaneous quantitation of geosmin (GSM) and 2-methylisoborneol (2-MIB) was developed. The procedure involved purging a 25 mL sample volume, containing 1% (v/v) methanol, at 60°C for 20 min. Quantitation was done by separation on an HP 5-MS capillary column (30 m x 0.25 mm x 0.25 µm), followed by mass spectrometric detection in the selected ion monitoring (SIM) mode and a multiplier voltage of 400 mV above the auto tune setting. The method was reproducible (RSD <15%) and linear (r2 = 0.995) over the calibration range (5-100 ng/L). The relative recoveries of analytes from potable and raw water were between 80 and 120%; limits of quantitation (LOQ) achieved were 4 ng/L and 7 ng/L, for GSM and 2-MIB, respectively.

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