Summary
A digestion-absorption train is described for the determination of sulphide in water-logged soils. The soil sample is treated with hydrochloric acid and the hydrogen sulphide evolved is swept by means of carbon dioxide into an absorption tube containing zinc acetate-sodium acetate solution. The precipitated sulphide is then determined absorptiometrically after development of the methylene blue colour.
References
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Patel, S.S., and Spencer, C. P., Determination of microgram quantities of sulphide in biological materials. Anal. Chim. Acta,27, 278–282 (1962).
Fogo, J. F. and Popowsky, M., Spectrophometric determination of hydrogen sulphide (methylene blue method). Anal. Chem.21, 732–734 (1949).