Lipids of the cottonseed. III. Perchloric acid ashing of lipids for the determination of phosphorus

Summary Cottonseed oil is effectively oxidized with a mixture of perchloric and nitric acids in connection with the determination of phosphorus by the Fisk and Subbarow method. The development of the molybdenum blue in the procedure is independent of the acid content in the reducing medium up to 0.5...

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Published inJournal of the American Oil Chemists' Society Vol. 25; no. 6; pp. 219 - 220
Main Authors Frampton, Vernon L., Maseles, Ruth Dodds, Martin, Garland Ned
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer‐Verlag 01.06.1948
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Summary:Summary Cottonseed oil is effectively oxidized with a mixture of perchloric and nitric acids in connection with the determination of phosphorus by the Fisk and Subbarow method. The development of the molybdenum blue in the procedure is independent of the acid content in the reducing medium up to 0.5 normal. The presence of perchloric acid does not interfere with the development of the molybdenum blue. The phosphorus content of cottonseed extracts depends on the nature of the solvent. The quantities obtained varied from 0.0071 to 0.117%. A phospholipid containing 3.73% phosphorus was isolated from cottonseed.
ISSN:0003-021X
1558-9331
DOI:10.1007/BF02645898