Analysis Of Milk And Milk Products by Henry LeffmannAnalysis Of Milk And Milk Products by Henry Leffmann

Analysis Of Milk And Milk Products

byHenry Leffmann

Paperback | May 18, 2012

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 Excerpt: ...cent. or more, the adulteration can be detected with certainty and an approximate quantitive determination made. Distillation method.--The fatty acids containing a small number of carbon atoms, set free by the process noted above, are soluble in water and volatile. A method for their estimation depending on their solubility in water was perfected by Hehner, but has now been displaced by a distillation method originally suggested by Hehner & Angell, but improved by Reichert, and the details perfected by others, especially Wollny, and now generally known as the Reichert-'Wollny method. We have modified the process by substituting a solution of sodium hydroxid in glycerol as the saponifying agent, by which the time required is much shortened, the result subject to less variation, and the titration more exact. The following reagents are required. Glycerol-soda.--One hundred grams of pure sodium hydroxid are dissolved in 100 c. c. of distilled water, and allowed to stand until clear. Twenty c. c. of this solution are mixed with 180 c. c. of pure concentrated glycerol. The mixture can be conveniently kept in a capped bottle holding a 10 c. c. pipet, with a wide outlet. Sulfuric acid.--Twenty c. c. of pure concentrated sulfuric acid, made up with distilled water to 100 c. c. Barium hydroxid.--An approximately decinormal, accurately standardized, solution of barium hydroxid. Indicator.--An alcoholic solution of phenolphthalein. About 50 grams of the sample are placed in a beaker, and heated to a temperature of 500 to 6o C., until the water and curd have settled to the bottom. The clear fat is then poured on a warm, dry plaited filter, and kept in a warm place until 25 or 30 c. c. have been collected. If the filtrate is not perfectly clear, it should be reheated...
Title:Analysis Of Milk And Milk ProductsFormat:PaperbackDimensions:38 pages, 9.69 × 7.44 × 0.08 inPublished:May 18, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217174175

ISBN - 13:9780217174176