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Milk fat is separated from proteins by adding sulfuric acid. The separation is facilitated by using amyl alcohol and centrifugation. The fat content is read directly via a special calibrated butyrometer. Gerber developed specialized butyrometers (tubes), pipettes, and centrifuges. Water baths built specifically for the Gerber tubes are often used.
In the UK, teaspoons and tablespoons are formally 1 ⁄ 96 and 1 ⁄ 32 of an imperial pint (5.92 mL and 17.76 mL), respectively. In Canada, a teaspoon is historically 1 ⁄ 6 imperial fluid ounce (4.74 mL) and a tablespoon is 1 ⁄ 2 imperial fl oz (14.21 mL).
Mass fraction can also be expressed, with a denominator of 100, as percentage by mass (in commercial contexts often called percentage by weight, abbreviated wt.% or % w/w; see mass versus weight). It is one way of expressing the composition of a mixture in a dimensionless size ; mole fraction (percentage by moles , mol%) and volume fraction ...
[citation needed] A cheese's fat content is expressed as the percentage of fat in the cheese's dry matter (abbreviated FDM or FiDM), which excludes the cheese's water content. [7] For example, if a cheese is 50% water (and, therefore, 50% dry matter) and has 25% fat, its fat content would be 50% fat in dry matter. [8]
These cutlery spoons are also called a "teaspoon" and "tablespoon", but are not necessarily the same volume as measuring spoons with the same names: Cutlery spoons are not made to standard sizes and may hold 2.5~7.3 ml (50%~146% of 5 ml) for teaspoons [3] and 7~20 ml (47%~133% of 15 ml) for tablespoons. The difference in size can be dangerous ...
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Add 17.6 mL of 90-92% sulfuric acid at 15-20°C. Spin the flask in a hand-cranked centrifuge for 5 minutes. Add water at 60°C until the fat layer is all in the neck. Warm the bottle to 55-60°C and spin it for another minute. Immerse the bottle upright in 55-60°C water until the fat layer is settled. Read out the fat contents from the ...
The volume of such a mixture is slightly less than the sum of the volumes of the components. Thus, by the above definition, the term "40% alcohol by volume" refers to a mixture of 40 volume units of ethanol with enough water to make a final volume of 100 units, rather than a mixture of 40 units of ethanol with 60 units of water.