The Chemistry of Foods: Tea, coffee, cocoa, sugar, etcCommittee of Council on Education, 1881 - Food |
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Page 16
... evaporated at a temperature of about 80 ° F. ( 26.6 ° C. ) . The weight of the beaker and oil is then ascertained . Theine . One of the two following methods is usually adopted for the estimation of theine in tea : - First Method . One ...
... evaporated at a temperature of about 80 ° F. ( 26.6 ° C. ) . The weight of the beaker and oil is then ascertained . Theine . One of the two following methods is usually adopted for the estimation of theine in tea : - First Method . One ...
Page 17
... evaporated to dryness with the addition of a further small quantity of magnesia , and completely exhausted with pure hot benzol . On distillation , or evaporation of the benzol , the theine is left in a crystalline and almost colourless ...
... evaporated to dryness with the addition of a further small quantity of magnesia , and completely exhausted with pure hot benzol . On distillation , or evaporation of the benzol , the theine is left in a crystalline and almost colourless ...
Page 20
... from the precipitated albumin is evaporated to a small bulk , and after the addition of a few drops of hydrochloric acid , the pectin and Dectic acid are precipitated by the addition of 200 cubic centimetres of alcohol 20 TEA .
... from the precipitated albumin is evaporated to a small bulk , and after the addition of a few drops of hydrochloric acid , the pectin and Dectic acid are precipitated by the addition of 200 cubic centimetres of alcohol 20 TEA .
Page 21
... filter , and the tea - powder washed with warm ether . The filtrate is evaporated to dryness , and treated with hot water to dissolve out any substances soluble therein . The portion insoluble in water is then dried TEA . 21.
... filter , and the tea - powder washed with warm ether . The filtrate is evaporated to dryness , and treated with hot water to dissolve out any substances soluble therein . The portion insoluble in water is then dried TEA . 21.
Page 22
... evaporated to dryness . The residue is exhausted with benzol , and , after filtering and evaporating the benzol , the extract is treated with boiling water , as in the former part of the process . After removing the water , the resinous ...
... evaporated to dryness . The residue is exhausted with benzol , and , after filtering and evaporating the benzol , the extract is treated with boiling water , as in the former part of the process . After removing the water , the resinous ...
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Common terms and phrases
250 cubic centimetres Acorns added adulteration albumin alcohol alkaloid analysis appearance bean benzol berries boiling water caffeic acid Caffeine cane caramel cells cellulose cent centimetres of water chemists chicory cloth cocoa cocoa nibs coffee cold water colouring matter Congou consists constituents contains copper crown 8vo crystals cubic centimetres Demy 8vo dextrin dextro-glucose dilute dissolved distilled dried estimation ether evaporated exhausted leaves Fehling's fermentation filtered filtrate glucose grains grams granules green tea husk India infusion insoluble invert-sugar kernel laticiferous laticiferous tissue leaf magnesia mangold wurzel manufacture mineral matter mixture nitrogen obtained Orange Pekoe oxide Parsnips percentage of ash portion potash powder precipitate prepared present proportion Prussian blue pure cane-sugar raw sugar removed roasted sample of coffee seeds Silica skin soluble in water solution Souchong specific gravity starch sulphuretted hydrogen sulphuric acid tannic acid tannin temperature theine theobromine Trinidad vegetable substances weight wurzel
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