Sulfur content of plant material: A comparison of methods of oxidation prior to determination
- 1 January 1980
- journal article
- research article
- Published by Informa UK Limited in Communications in Soil Science and Plant Analysis
- Vol. 11 (3), 257-266
- https://doi.org/10.1080/00103628009367034
Abstract
Procedures for S determination involving digestion of plant material with HNO3/HC104 mixtures gave lower values than those using oxygen flask combustion. Tests on a range of S compounds showed that the HNO3/HC104 procedure underestimated S present in methionine, cysteine and glutathione but S in sulfate and the glucosinolate, sinigrin, was not underestimated. Low recoveries using HNO3/HC104 digestion procedures can be due both to incomplete oxidation of certain compounds and to gaseous losses during the vigorous boiling stage of digestion.Keywords
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