Determination of organic carbon in aqueous extracts of soils and fertilizers
- 1 June 1991
- journal article
- research article
- Published by Informa UK Limited in Communications in Soil Science and Plant Analysis
- Vol. 22 (9-10), 795-807
- https://doi.org/10.1080/00103629109368455
Abstract
A simple and accurate method for the routine determination of organic carbon in aqueous extracts of soils and fertilizers is described. Samples are oxidized for exactly 10 minutes with a mixture of 5 mL of 2N potassium dichromate plus 20 mL of concentrated sulphuric acid at 160 ± 2°C, and the excess dichromate is titrated either potentiometrically or manually with iron (II) sulphate. An appropriate correction factor (1.05) is suggested for aqueous extracts from humic acid.This publication has 9 references indexed in Scilit:
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