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Abstract
Abstract A detailed study was made of the well‐known organic carbon determination that is based on measuring the absorbance of the green chromium(III) complex generated when organic matter is oxidized by potassium dichromate in acidic medium. The green chromic colour proved to be unstable, turning slowly to a violet colour. It was also found that chromic sulphate exerts a catalytic influence on the decomposition of excess dichromate. Based on this work, a modified method was developed which is simple, rapid, and very accurate when working under carefully controlled conditions.
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