The Chemistry of Foods: Tea, coffee, cocoa, sugar, etcCommittee of Council on Education, 1881 - Food |
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Page 26
... evaporated down either in whole or in part , and the percentage of dry extract calculated . Or , 200 grains of tea are finely powdered in a mortar , and introduced into a flask with 2,000 grains of water at 60 ° F. ( 15.5 ° C. ) , and ...
... evaporated down either in whole or in part , and the percentage of dry extract calculated . Or , 200 grains of tea are finely powdered in a mortar , and introduced into a flask with 2,000 grains of water at 60 ° F. ( 15.5 ° C. ) , and ...
Page 48
... evaporated , and to the aqueous residue subacetate of lead is added . The precipitate is thrown on a filter , washed and decomposed with sulphuretted hy- drogen . The filtrate from the plumbic sulphide is evaporated to dry- ness , when ...
... evaporated , and to the aqueous residue subacetate of lead is added . The precipitate is thrown on a filter , washed and decomposed with sulphuretted hy- drogen . The filtrate from the plumbic sulphide is evaporated to dry- ness , when ...
Page 84
... evaporated to dryness , and the residue weighed , the ash being subsequently determined and deducted from the total dry residue . As the solution evaporates it assumes a bright red hue , and part of the colouring matter of the residue ...
... evaporated to dryness , and the residue weighed , the ash being subsequently determined and deducted from the total dry residue . As the solution evaporates it assumes a bright red hue , and part of the colouring matter of the residue ...
Page 85
... evaporated to dryness , and the residue purified by solution successively in water and in benzol . A substance was then obtained - especially from Trinidad cocoa - which crystallized in fine silky needles , after the manner of theine ...
... evaporated to dryness , and the residue purified by solution successively in water and in benzol . A substance was then obtained - especially from Trinidad cocoa - which crystallized in fine silky needles , after the manner of theine ...
Page 86
... evaporate the water extract to dryness , and again treat with cold water , when a further small quantity of crystals was obtained . If the crude residue obtained by alcohol from the magnesia mixture were sub- mitted to a nitrogen ...
... evaporate the water extract to dryness , and again treat with cold water , when a further small quantity of crystals was obtained . If the crude residue obtained by alcohol from the magnesia mixture were sub- mitted to a nitrogen ...
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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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