Specific gravity of milk

Quevenne scale chem Arbitrary scale used with hydrometers or lactometers in the determination of the specific gravity of milk degrees Quevenne = 1000 (specific gravity - 1). ka ven, skal ... 

The density and specific gravity of milk vary somewhat with breed. Milk from Ayrshire cows has a mean specific gravity of 1.0317 while that of Jersey and Holstein milks is 1.0330. Density varies with the composition of the milk and its measurement has been used to estimate the total solids content of milk. The density of a multicomponent mixture (like milk) is related to the density of its components by ... 

Table 8.2. Specific Gravity of Milk from Cows of Various Breeds.

Demott, B. J. 1967. The influence of vacuum pasteurization upon the freezing point and specific gravity of milk. Milk Food Technol. 30, 253-255. 

This is a volumetric method. A Babcock pipet will deliver 17.6 mL of milk to the Babcock bottle. The specific gravity of milk is 1.032. Thus, 1.032 x 17.6 will generate 18.16 g of milk in the bottle. 

Instrument to determine the specific gravity of milk as an indication of its fat content... 

The specific gravity of milk can be used to determine the total solids (TS) content and is usually measured by either a standard hydrometer or with a pycnometer (density bottle) after gentle mixing. The effect of different temperatures can be corrected using a table. The TS of the milk can be calculated if the fat content is known by using Richmond s formula ... 

The specific gravities of fluid milk products at various temperatures were measured throughout the United States by Herrington for a committee representing 13 Federal Milk Marketing orders (USDA 1965). A unique method was developed whereby the weight of the sample required to fill a Babcock bottle from the 0% to the 4% mark was com-... 

Quevenne Scale—This scale is used for milk testing and essentially represents an abbreviation of specific gravity, For example, 20° Quevenne indicates a specific gravity of 1,020 40° Quevenne. a specific gravity of 1,040, and so on, One lactometer unit approximates 0,29° Quevenne. 

In order to decide if a milk has been watered, the health authorities Of Italian municipalities usually rely on the specific gravity, the fat and the solids not fat some use also the specific gravity of the whey, and very few the cryoscopic index. The standards adopted by certain of these authorities are given in Table I ... 

Municipality. Specific Gravity of the Milk. Specific Gravity of the Whey. Total Dry Residue, % Fat, % Sohds not Fat, % ... 

I % would be separated milk in either, the solids not fat should be at least 9%, and the specific gravity of the whey 1-027. 

Formic Ether—also called for-miaie of ethyt it a limpid, aromatic miid, lighter than water soluolo in 10 parts of that fluid has a specific gravity of. 915, and boils at 130 Fahr. To obtain it, mix in a retort, with a well-cooled receiver, 7 parts dry formiato of soda, 10 parts oil of vitriol, and 6 parts 90 per cent, alcohol. The greater part will distill over hyr tho heat spontaneous-ty developed, after wmch the heat of a water-bath may be applied. Puri it by ablation, first with milk of lime, and afterwards with chloride of calcium, Cooley.)... 

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