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ARS Home » Research » Publications at this Location » Publication #90863


item Erhan, Selim
item Phillips, Bliss
item Eskins, Kenneth

Submitted to: Fine Particle Society
Publication Type: Abstract Only
Publication Acceptance Date: 4/4/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Fantesk**TM, is a very stable emulsion of oil, water, and starch. It has numerous areas of application, ranging from food to adhesives, coatings, lubricants, and pharmaceuticals. During the production of Fantesk**TM, there is a certain amount of starch and oil that is lost in the equipment before the jet cooking process. This loss depends on the type and size of the jet cooker and the operator. Therefore, in either type of application it is necessary to have a rapid, reproducible method to quantitate the amount of lipid in the composite, and pulsed NMR spectroscopy was used to obtain this information. This method provides a rapid alternative to the long, laborious, traditional methods of analysis and is widely used in industry to determine the oil and fat content of seeds, margarines, sausages, chocolates, and other food products. NMR measurements were done on an NMS-series Minispec at 10 MHZ**1H frequency. A calibration line was constructed by measuring the NMR signal of four standards made up of 100% cornstarch and added soybean oil. The calibration results were excellent. The correlation coefficient was greater than 0.999 between the Calculated % Oil of the samples and the weight-normalized NMR signal due to the liquid-like fraction of the sample. The total oil content of Fantesk**TM was also measured by hydrolyzing the starch with alpha-amylase, then extracting the liberated oil with hexane. These results were also compared with quantitation results obtained from a different pulsed NMR instrument and with a different set of standards. We conclude that NMR is able to measure the % oil accurately as long as the corresponding starch base is used to construct the calibration line.