The Use of Gas‐Liquid Chromatography for the Determination of Sugars Extracted from Soils by Sulfuric Acid

Oades, JM; Kirkman, M. A.; Wagner, George H.

doi:10.2136/sssaj1970.03615995003400020017x

Cited by 97 publications

(54 citation statements)

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“…The recovery was 85 percent for mannose and between 91 and 95 percent 210 M. YOSHIDA and K. KUMADA b) Determination of neutral sugars. Based on the methods described by BORCHARDT and PIPER (2) and OADES et al (3), the hydrolysates plus internal standard (myoinositol) were transferred into a round bottom flask (100 ml). About 0.07-0.08 g of sodium borohydride was added to the flask, mixed well and allowed to react for 5 hr.…”

Section: Resultsmentioning

confidence: 99%

Studies on the properties of organic matter in buried humic horizon derived from volcanic ash

Yoshida

Kumada

1979

Soil Science and Plant Nutrition

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Section: Resultsmentioning

confidence: 99%

Studies on the properties of organic matter in buried humic horizon derived from volcanic ash

Yoshida

Kumada

1979

Soil Science and Plant Nutrition

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“…Neutral sugar analyses were carried out in 2 steps following a procedure adapted from previous work ([ Bethge et al, 1966], [Oades et al, 1970], [Modzeleski and Laurie, 1971] and [Cowie and Hedges, 1984]). The first step, which comprises a phase of soaking with 24 N H 2 SO 4 , allows the hydrolysis of both cellulose and hemicellulose(s).…”

Section: Carbohydrate Analysismentioning

confidence: 99%

Assessment of peat quality by molecular and bulk geochemical analysis: Application to the Holocene record of the Chautagne marsh (Haute Savoie, France)

et al. 2008

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. Assessment of peat quality by molecular and bulk geochemical analysis : Application to the Holocene record of the Chautagne marsh (Haute Savoie, France). Chemical Geology, Elsevier, 2008, 254 (1-2) AbstractAlthough it is primarily constituted in general from a limited variety of local plants, peat is however sensitive to physicochemical changes in the medium, in particular those induced by hydrological fluctuations. The present study aims at confronting the information on peat quality provided by various families of biochemical components (lipids, lignin, sugars), especially in order to check the validity of a new organic matter (OM) quality indicator, the "R400" index, directly drawn from Rock-Eval pyrolysis. This parameter, which is deduced from the sole S2 pyrolysis peak, is extremely robust. The Chautagne marsh, located between the Le Bourget Lake and the Rhône River lies in a key situation for recording lake level variations and Rhône River floods all along its Holocene filling. The study was conducted on a 6 m long core which comprises 4 m of peat under 66 cm of pedogenetically altered OM-rich sediment. Classical Rock-Eval pyrolysis revealed few qualitative and quantitative OM changes with Total Organic Carbon (TOC) values close to 50% and Hydrogen Index values around 300-350 mg HC g-1TOC in the peat. The R400 parameter remains practically unchanged in the upper unit affected by pedogenesis. It fluctuates however all along the peaty unit together with a progressive downward decrease, ascribable to diagenesis. Molecular analyses show that samples with high R400 values are richer in sugars and in slightly oxidized lignin. These results support the idea that the R400 parameter can be used as an indicator of OM preservation. Since OM preservation is mostly controlled by the water table in peat, the Chautagne marsh records hydrological fluctuations such as those of the Le Bourget Lake water level, all along the Holocene.

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“…La technique utilisée, préconisée par Oades et al (1970), offre l'avantage d'extraire la plus grande partie des sucres monomères tout en limitant leur dégradation. Les sucres extraits sont dosés par chromatographie en phase gazeuse après silylation .…”

Section: Extraction Et Dosage Des Sucresunclassified

Relations entre stabilité de l'agrégation et matière organique totale et soluble à l'eau chaude dans des sols ferrallitiques argileux (Congo, Brésil)

Kouakoua¹,

Larré-Larrouy²,

Barthès³

et al. 1999

Can. J. Soil. Sci.

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. Relations entre stabilité de l'agrégation et matière organique totale et soluble à l'eau chaude dans des sols ferrallitiques argileux (Congo, Brésil). Can. J. Soil Sci. 79: 561-569. La matière organique (MO) a souvent un rôle important dans la stabilité structurale des sols. Ce travail a pour objectif de caractériser la MO soluble à l'eau chaude et son rôle dans la stabilité structurale de sols ferrallitiques argileux sous différents modes de gestion. La stabilité des macroagrégats (>200 µm) est évaluée à l'eau froide (AS) et après extraction à l'eau chaude (ASe). Les teneurs en carbone organique total et sous forme de sucres et la composition en sucres sont déterminées sur le sol et sur l'extrait eau chaude.Défrichement et mise en culture déterminent généralement une diminution des teneurs en carbone et en macroagrégats stables, mais certaines pratiques permettent de limiter ces effets. Les extraits eau chaude sont plus riches en sucres que les sols, l'origine microbienne des sucres étant dominante dans les deux cas. La stabilité des agrégats est corrélée à la teneur en carbone du sol et des extraits eau chaude, ainsi qu'à la teneur en sucres du sol. Toutefois, l'absence de différence significative entre AS et ASe, pour chaque échantillon étudié, révèle que les MO solubles à l'eau chaude n'ont pas ici de rôle essentiel dans la stabilité de l'agrégation.Mots clés: matière organique, stabilité des macroagrégats, extraction eau chaude, sucres, sols ferrallitiques Kouakoua, E., Larré-Larrouy, M.-C., Barthès, B., de Freitas, P. L., Neves, C., Sala, G.-H. and Feller, C. 1999. Relationship between aggregate stability and total and hot-water-extractable organic matter in clayey ferrallitic soils (Congo, Brazil). Can. J. Soil Sci. 79: 561-569. Organic matter (OM) generally plays an important role in soil aggregate stability. The objective of this work was to characterize the hot water-extractable OM and its role in the aggregate stability of clayey ferrallitic soils under different land use management. The macroaggregate (>200 µm) stability of these soils was determined before (AS) and after hotwater extraction (ASe). The contents in total organic carbon and in carbon present as carbohydrates, as well as the sugar composition, were determined on the bulk soils and their hot-water extracts.The carbon and macroaggregate contents decreased upon land-clearing and cultivation, but to a lesser extent when some cultural practices were used. Whatever the situation considered, the hot-water extract always presented a higher carbohydrate content than the bulk soil. The high values of ratios r = (galactose + mannose)/(arabinose + xylose) suggested that a large proportion of carbohydrates was of microbial origin. There were significant correlations between AS and the carbon content of bulk soils or hotwater extracts, and between AS and the soil carbohydrate content. On the opposite, whatever the soil sample studied, no significant difference could be found between AS and ASe, showing that hot-water extractable OM had thus no clea...

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The Use of Gas‐Liquid Chromatography for the Determination of Sugars Extracted from Soils by Sulfuric Acid

Cited by 97 publications

References 0 publications

Studies on the properties of organic matter in buried humic horizon derived from volcanic ash

Studies on the properties of organic matter in buried humic horizon derived from volcanic ash

Assessment of peat quality by molecular and bulk geochemical analysis: Application to the Holocene record of the Chautagne marsh (Haute Savoie, France)

Relations entre stabilité de l'agrégation et matière organique totale et soluble à l'eau chaude dans des sols ferrallitiques argileux (Congo, Brésil)

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