Analytical method for determining volatiles, solids and solvent

Chemistry: analytical and immunological testing – Food or dairy products – Dairy product

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73 76, 422 68, 422 74, 422 78, 436 20, 436 22, 436 43, 436178, 436908, G01N 504, G01N 2200, G01N 2204, G01N 2514

Patent

active

047538899

ABSTRACT:
An apparatus and method for quantitatively measuring volatiles, solids and solvent extractables is described which provides rapid and accurate determinations using microwave heating, electronic balance weighing and solvent extracting of solubles. The method involves subjecting a weighed sample to microwave drying for a preselected time, reweighing to obtain the dry weight and determine volatile loss, solvent extracting the dried sample to determine fats, oils and other extractables followed by final measurement of residual solids. The apparatus is preferably automated to sequentially actuate the required weighing, microwave heating, solvent extraction, redrying, reweighing and calculation of the percentages of volatiles, solvent solubles and solids. The apparatus and method are particularly suited for analytical uses in the food and dairy industries.

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Atherton et al., "Chemistry and Testing of Dairy Products", Chapters 4 and 5, pp. 71-137, 1977, published by AVI Publishing Co., Inc., Westport, Conn.
Lepper et al., "Official Methods of Analysis of the Association of Official Agricultural Chemists", Seventh Edition, Published by the Association of Official Agricultural Chemists, Washington, D.C., 1950, pp. 255-259.
Evans, "A Laboratory Handbook for the Analysis of Milk, Butter and Cheese", p. 25, 1904.
Fisher 79 catalog, Fisher Scientific Company, p. 226, 1978.

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