Biochemistry of soils derived from volcanic ashes. VI. Carbohydrates determination

María Aguilera S.2, Gilda Borie B.2, Pamela Milla N.2 y Pedro Peirano V.2

A first prospection was made of the content and identity of the carbohydrates in Chilean soils. Seven volcanic and two alluvial soils were selected. Determinations, by the Anthrone method, were done of free carbohydrates and, after acid hydrolysis of the soil, of total carbohydrates. Total carbohydrates turned out to be greater in volcanic than in alluvial soils; their amount is high in relation to that appearing in the literature, and it correlated closely with the O.M. On the other hand, the content of free carbohydrates is higher in alluvial soils. The carbohydrates in the Chilean soils under study represent a percentage of the organic carbon that líes in the ranges described for other soils. Carbohydrates were identified in soil hydrolysates by Gas-liquid chromatography and using trimethylsilylated derivatives.

1 Facultad de Ciencias Quimicas y Farmacéuticas, U. de Chile, CasiIla 233, Santiago, Chile.
2 Memorista para optar al titulo de Quimico Farmacéutico, de la Facultad de Ciencias Químicas y Farmacéuticas, U. de Chile.