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KMID : 1024520140230101693
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Journal of the Environmental Sciences
2014 Volume.23 No. 10 p.1693 ~ p.1701
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Rapid and Simultaneous Determination of Volatile Fatty Acids and Indoles in Pig Slurry and Dog Excrement by Solid-Phase Micro-Extraction Method with Gas Chromatography
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Kim Hyun-Jung
Yu Mee-Seon
Yang Sung-Bong
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Abstract
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A rapid and simple method for the quantitative determination of volatile fatty acids (VFAs; propionic acid, n-butyric acid,
i-valeric acid and n-valeric acid) and indoles (phenol, p-cresol, 4-ethyl phenol, indole and skatole) in pig slurry and dog
excrement using solid-phase micro-extraction (SPME) coupled to gas chromatography was evaluated. 50/30 ㎛
DVB/CAR/PDMS (Divinylbenzene/Carboxen/Polydimethylsiloxane) fiber was used to extract the target compounds in
aqueous media. Sample amount and adsorption time was standardized for the routine analysis. Detection limits were from 0.11to 0.15 ㎍/L for VFAs and from 0.12 to 0.28 ㎍/L for indoles and the correlations observed (R2) were 0.975～1.000. This
method was applied to the pig slurry, fertilizer, compost and dog excrement. In nearly all cases, the indoles were detected in concentrations of higher than their limits of detection (DOLs). But the VFAs in swine manure were below their DOLs.
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KEYWORD
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SPME, Pig slurry, Dog excrement, Odor, Volatile fatty acids, Indoles
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