- P-ISSN 1225-0163
- E-ISSN 2288-8985
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- P-ISSN1225-0163
- E-ISSN2288-8985
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Analysis of Trace odorous compounds
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2002, v.15 no.6, pp.534-539
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(2002). Analysis of Trace odorous compounds. Analytical Science and Technology, 15(6), 534-539.
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Abstract
We established an analytical method for the measurement of trace amounts of earthy/musty odorous geosmin (GSM) and 2-methylisoborneol (2-MIB) in water using GC/MS. Water samples were extracted with n-hexane (liquid-liquid extraction, LLE) and the extracts were measured by GC/MS. The extraction yields of the two compounds were tested to be (<TEX>$87{\pm}8$</TEX>)% and (<TEX>$78{\pm}8$</TEX>)%, respectively. The limits of quantitation (LOQs) of the two compounds by this method were greatly improved to ~0.3 ng/L. The analytical methods were applied to analyze water samples from several rivers in Korea and waters after water treatment processes. The highest levels of geosmin and 2-methylisoborneol in raw water from a river were measured to be (<TEX>$4.2{\pm}0.4$</TEX>) ng/L and (<TEX>$44{\pm}4$</TEX>) ng/L, respectively. The levels only slightly decreased to (<TEX>$1.3{\pm}0.1$</TEX>) ng/L and (<TEX>$18{\pm}2$</TEX>) ng/L even after water treatment, indicating that the odorous compounds were not properly removed by the treatment processes.
- keywords
- liquid-liquid extraction (LLE), geosmin (GSM), 2-methylisoborneol (2-MIB), odorous compounds, GC/MS
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