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Comparison of Hexane and Petroleum Ether to Measure Surface Oil Content

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Many studies have measured surface oil on potato chips and spray dried powders using either petroleum ether or hexane. This study compared the effectiveness of the 2 solvents using aluminum squares to ensure oil stays on the surface of the sample during the measurement. Aluminum squares were sprayed with soybean oil, and surface oil was measured immediately and after 1 day. Each of the 8 aluminum samples were individually dipped for 12 s in either hexane or petroleum ether. For immediately extracted samples, there was no significant difference in the amount of oil extracted using either hexane or petroleum ether. For 1-day-old samples, hexane extracted more oil than petroleum ether. Neither method extracted all of the surface oil.
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Document Type: Research Article

Affiliations: The Ohio State University, Department of Food Science and Technology, 2015 Fyffe Rd, Columbus, OH 43210.

Publication date: November 1, 2007

More about this publication?
  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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