Walkley–Black method

A method for soil organic carbon in which the carbon is oxidised by a known excess of potassium dichromate in concentrated sulphuric acid, and the unused dichromate is titrated with ferrous ammonium sulphate. A recovery factor (conventionally 1.3) corrects for incomplete oxidation.

• Also: wet oxidation method
• Also: chromic acid titration
• Also: dichromate oxidation