The Chemistry of Foods: Tea, coffee, cocoa, sugar, etcCommittee of Council on Education, 1881 - Food |
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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 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 ...
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Common terms and phrases
250 cubic centimetres added adulteration albumin alcohol alkaloid amount analysis appearance bean benzol boiling water caffeic acid Caffeine cane caramel cells cellulose cent centimetres of water chemical chemists chicory cocoa cocoa nibs coffee cold water colouring matter Congou consists constituents contains copper crystals cubic centimetres dextrin dextro-glucose dilute dissolved distilled dried estimation ether evaporated exhausted leaves Fehling's fermentation filtered filtrate flavour glucose grains grams granules green tea husk India infusion insoluble invert-sugar kernel Large crown 8vo laticiferous laticiferous tissue leaf magnesia mangold wurzel mineral matter mixture nitrogen obtained Orange Pekoe oxide Parsnips percentage of ash portion potash powder precipitate prepared present proportion pure cane-sugar raw sugar removed residue roasted rotatory power seeds Silica skin small quantity soluble in water solution Souchong specific gravity starch sulphuretted hydrogen sulphuric acid tannic acid tannin temperature theine theobromine Trinidad weight woody wurzel Young Hyson