A Method of Analysis for Canned Condensed Milk.

Abstract

BEFOREproceeding with the analysis, it may be desirable to ascertain the approximate specific gravity of the sample as follows:Weigh the can with its contents. Then remove contents, replace with water to the top, and weigh again. Weigh empty can (sufficiently dried) and ascertain weights of milk and water separately. Divide the weight of condensed milk by the weight of water as a standard, and the quotient is the specific gravity of the condensed milk (near enough for practical purposes).The specific gravity, which is not a matter of great importance, may vary from 1.27 to 1.37, according to the quantity of canesugar added, or according to the relative amounts of fat and albuminoid material in the milk used for condensation. That is, milk deficient in fat may show an increment in gravity irrespective of the amount of sugar added.As to the method of analysis: the contents of the can, together with any portions of crystallized sugar, which may adhere to the bottom of the can like a hard mealy mass, are transferred to a beaker and stirred vigorously until the mass iRead before the New York Section of the American Chemical Society, February 10,1899.