Abstract
2 ml. of pure concentrated sulphuric acid are added drop by drop to 0.1 ml. of a solution of dehydroisoandrosterone in ethyl alcohol or of an extract containing 5–50 γ of that substance in a test tube. The mixture is heated to 60° C. for 25 min. and then cooled in ice water. The chilling is discontinued, and 5 ml. ethyl ether (water- and peroxide-free) are added slowly while the mixture is thoroughly stirred with a glass rod.
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JENSEN, C. Quantitative Determination of Dehydroisoandrosterone in Pure Solutions and in Urine Extracts. Nature 165, 321 (1950). https://doi.org/10.1038/165321a0
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DOI: https://doi.org/10.1038/165321a0
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