Determination of volatile fatty acids in landfill leachates by ion-exclusion chromatography.
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.
Yamamoto
Atsushi
A
Toyama Institute of Health, 17-1 Nakataikoyama, Kosugi-machi, Toyama 939-0363, Japan. akmiy@pc.ctt.ne.jp
Yasuhara
Akio
A
Kodama
Shuji
S
Matsunaga
Akinobu
A
Suzuki
Shigeru
S
Mohri
Shino
S
Yamada
Masato
M
D002850:Chromatography, Gel / Q000379:methods; D002852:Chromatography, Ion Exchange / Q000379:methods; D005230:Fatty Acids, Nonesterified / Q000032:analysis*; D009862:Online Systems; D012037:Refuse Disposal
D005230:Fatty Acids, Nonesterified