Determination of volatile fatty acids in landfill leachates by ion-exclusion chromatography |
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Authors: | Yamamoto Atsushi Yasuhara Akio Kodama Shuji Matsunaga Akinobu Suzuki Shigeru Mohri Shino Yamada Masato |
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Institution: | Toyama Institute of Health, 17-1 Nakataikoyama, Kosugi-machi, Toyama 939-0363, Japan. akmiy@pc.ctt.ne.jp |
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Abstract: | An ion-exclusion chromatographic method with on-line desalinization for the determination of volatile fatty acids in landfill leachates is described. Highly sensitive conductivity detection of the organic acids was achieved by using dilute p-hydroxybenzoic acid solution as an eluent. Interference with mineral acids was reduced by treatment with barium chloride solution prior to desalinization. A silver-loaded cation-exchange guard column for the desalinization was installed in series with the analytical column to avoid the contamination of organic acids. This method features detection limits of 0.01 mg L(-1) formic acid, 0.02 mg L(-1) acetic acid, 0.05 mg L(-1) propionic acid, and 0.1 mg L(-1) butyric acid, respectively, with an injection of 20 microL sample. Application of the on-line desalinization LC method is illustrated for leachate samples from a Japanese sanitary landfill. |
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Keywords: | Environmental analysis Volatile fatty acids Landfill leachate Ion-exclusion chromatography On-line desalinization |
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