Determination of low molecular weight volatile fatty acids in aqueous samples

Barcelona, Michael J.; Liljestrand, Howard M.; Morgan, James J.

doi:10.1021/ac50052a025

Cited by 64 publications

(23 citation statements)

References 46 publications

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“…Weathering solutions in the first centimetres of the soil horizons are often highly enriched in organic acids Table 1 The 7 steps sequential extraction procedure of Organic acids such as salicylic or citric acids are sometimes used to perform this kind of leaching experiment (Wickman, 1996). Numerous other studies (Mueller et al, 1958;Barcelona et al, 1980;Galloway et al, 1982;McDowell and Likens, 1988) have shown that both acetic and formic acids are the most representative organic acids of low molecular weight in natural waters (rain water, throughfall, soil solutions, stream and lake waters). The acid concentration of 0.001 M corresponds to the most acid soil solutions in this area (Probst et al, 1990;Dambrine et al, 1995).…”

Section: Methodsmentioning

confidence: 99%

Distribution and origin of major and trace elements (particularly REE, U and Th) into labile and residual phases in an acid soil profile (Vosges Mountains, France)

Aubert

Probst

Stille

2004

Applied Geochemistry

102

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Section: Methodsmentioning

confidence: 99%

Distribution and origin of major and trace elements (particularly REE, U and Th) into labile and residual phases in an acid soil profile (Vosges Mountains, France)

Aubert

Probst

Stille

2004

Applied Geochemistry

102

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“…Volatile fatty acids in the lake water were derivatized in duplicates according to the technique of Barcelona et al (1980) and analyzed on a Hewlett-Packard 5890 series II capillaq, gas chromatograph with a 30-m DB-5 column and an FID. The detection limit for acetate, propionate, butyrate, and valerate was 1 PM.…”

Section: Methodsmentioning

confidence: 99%

The sulfur cycle in the chemocline of a meromictic salt lake

Overmann

Beatty

Krause

et al. 1996

Limnology & Oceanography

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An extremely dense layer of the purple sulfur bacterium Amoebobacter purpureus in the chemocline of meromictic Mahoney Lake (British Columbia) was investigated over a 2-yr period. Within this layer, sulfide, elemental sulfur, and polysulfides were the main species of reduced sulfur. The oxidative part of the sulfur cycle was dominated by anoxygenic photosynthesis of A. purpureus. During summer, when sulfide concentrations in the layer were limiting, intracellular sulfur became the main electron donor for photosynthesis. 634S determinations revealed that the intracellular sulfur reacts chemically with dissolved sulfide to form polysulfides. Polysulfide concentrations decreased over summer, accompanied by an increase in numbers of sulfur-reducing bacteria. Sulfate reduction was the major pathway of sulfide formation. The annual carbon requirement of sulfate-reducing bacteria in the chemocline (22.5 g C m-2 yr-I) was met by the photosynthetic C fixation of A. purpureus (33.5 g C m-2 yr-l). Carbon demand exceeded the concomitant C fixation temporarily in summer, however. The activities of biomass-degrading enzymes and the formation of volatile fatty acids were sufficient to provide the carbon substrates. Our data indicate that in Mahoney Lake, anoxygenic photosynthesis and sulfate reduction are only indirectly coupled via degradation and autolysis of photosynthetically formed biomass.

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“…P-b~mophena~l~te~ of volatile fatty acids were prepared using the procedure of BARCELONA et al (1980). except that the derivatization reaction was carried out at 100°C for one hr using toluene as solvent.…”

Section: Acetate Concentrationmentioning

confidence: 99%

Biogeochemistry of acetate in anoxic sediments of Skan Bay, Alaska

Shaw

Alperin

Reeburgh

et al. 1984

Geochimica et Cosmochimica Acta

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Abstract-The role of acetate in the biogeochemical cycling of organic matter in contemporary marine anoxic sediments of Skan Bay, Alaska was investigated with inhibition and quasi in situ turnover experiments. The turnover time for acetate oxidation in the upper 30 cm of the sediment column is cu. 1 hr. A molybdate inhibition experiment indicated that sulfate reducing bacteria were responsible for more than 95% of acetate oxidation. However, measured acetate oxidation rates exceeded sulfate reduction rates indicating that acetate oxidation rates are overestimated. Values for acetate concentration calculated from sulfate reduction rates (0.3-3.4 PM) were considerably lower than directly measured acetate concentrations (3. I-10.8 PM). Much of the chemically measured acetate may be microbiahy unavailable, perhaps in the form of a soluble or colloidal complex. A sorption experiment indicates that 10% to 40% of added acetate associates with Skan Bay sediment particles. Production of methane from acetate was detected only at 2 m depth.

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Determination of low molecular weight volatile fatty acids in aqueous samples

Cited by 64 publications

References 46 publications

Distribution and origin of major and trace elements (particularly REE, U and Th) into labile and residual phases in an acid soil profile (Vosges Mountains, France)

Distribution and origin of major and trace elements (particularly REE, U and Th) into labile and residual phases in an acid soil profile (Vosges Mountains, France)

The sulfur cycle in the chemocline of a meromictic salt lake

Biogeochemistry of acetate in anoxic sediments of Skan Bay, Alaska

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