A course in food analysis / by Andrew L. Winton.

  • Andrew Lincoln Winton
Date:
[1917]
Catalogue details

Licence: Public Domain Mark

Credit: A course in food analysis / by Andrew L. Winton. Source: Wellcome Collection.

    45/274 page 27
    ^Determination of Water, Fat, Curd, and Ash of Butter in One Weighed Portion. Weigh two tinned lead dishes, such as were used for the determination of total solids in milk (p. 15), and place in each dish 2 grams of the butter sample. Dry in a boiling water-oven for two and one-half hours, cool in a desic- cator, and calculate the loss in weight as percentage of moisture. While the dishes are in the oven prepare two porcelain Gooch Fig. 19.—Filtering Apparatus for Gooch Crucibles with Chapman Pump. crucibles, diameter 35 mm. (Fig. 19 G'), as follows: Connect the crucible G by means of a piece of large, thick rubber tubing with the filter tube T, the stem of which passes through the rubber cork of the tubulated Erlenmeyer flask F, made of thick glass so as to resist a vacuum. Connect the tubulature with the filter pump P and pour on the crucible a quantity of pulped asbestos, suspended in water, sufficient to form a blanket about | in. thick.
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