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THE OCCURRENCE OF SUBSTANCES WHICH INTERFERE WITH THE DETERMINATION OF ASCORBIC ACID IN ANTHOCYANIN-CONTAINING PLANT PRODUCTS

✍ Scribed by G. FRED SOMERS; W. C. KELLY; E. J. THACKER; ANNA MAY REDDER

Book ID: 108790834
Publisher: Institute of Food Technologists
Year: 1951
Tongue: English
Weight: 615 KB
Volume: 16
Category: Article
ISSN: 0022-1147
DOI: 10.1111/j.1365-2621.1951.tb17350.x

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Response of cottonseed oil products to t

Response of cottonseed oil products to the kreis test for rancidity : In the Kreis test a fat or oil is shaken with equal volumes of hydrochloric acid and a solution of phloroglucinol in ether. The development of a red color indicates that the fat or oil is rancid; its formation is probably due to the presence of aldehydes or ketones in the material tested. Chromogenetic substances, which give a positive Kreis reaction, occur in crude cottonseed oil. The researches of W. B. Smith (Journal of Industrial and Engineering Chemistry, 1920, xii, 764–766)

📂 Article 📅 1920 🏛 Elsevier Science 🌐 English ⚖ 82 KB