The Chemistry of Foods: Tea, coffee, cocoa, sugar, etcCommittee of Council on Education, 1881 - Food |
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Page 8
... exhausting the leaf , first with alcohol and then with water , and estimating the nitrogen in the portion of the ... exhausted by alcohol . It is precipitated by alcohol in presence of hydro- chloric acid as a transparent jelly , the ...
... exhausting the leaf , first with alcohol and then with water , and estimating the nitrogen in the portion of the ... exhausted by alcohol . It is precipitated by alcohol in presence of hydro- chloric acid as a transparent jelly , the ...
Page 16
... exhausted the tea as completely as possible with alcohol of 70 per cent . , and then with water , keeping the extracts apart and examining them separately . The result of following this process is that a larger total extractive is ...
... exhausted the tea as completely as possible with alcohol of 70 per cent . , and then with water , keeping the extracts apart and examining them separately . The result of following this process is that a larger total extractive is ...
Page 17
... exhausted with pure hot benzol . On distillation , or evaporation of the benzol , the theine is left in a crystalline and almost colourless state . Second Method . - One hundred grains of dried tea are reduced to a powder , and ...
... exhausted with pure hot benzol . On distillation , or evaporation of the benzol , the theine is left in a crystalline and almost colourless state . Second Method . - One hundred grains of dried tea are reduced to a powder , and ...
Page 18
... exhausted with boiling water , the solution filtered and made up to 200 cubic centimetres . 40 cubic centimetres of ... exhausting 2 grams of the powdered tea with boiling water , and making up to 250 cubic centimetres . This solution is ...
... exhausted with boiling water , the solution filtered and made up to 200 cubic centimetres . 40 cubic centimetres of ... exhausting 2 grams of the powdered tea with boiling water , and making up to 250 cubic centimetres . This solution is ...
Page 19
... that the experiments should Occupy the same time - about 6 minutes - and the solution should be kept vigorously stirred during the addition of the permanganate . Two grams of tea are now exhausted with boiling water C 2 TEA . 19.
... that the experiments should Occupy the same time - about 6 minutes - and the solution should be kept vigorously stirred during the addition of the permanganate . Two grams of tea are now exhausted with boiling water C 2 TEA . 19.
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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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