The Chemistry of Foods: Tea, coffee, cocoa, sugar, etcCommittee of Council on Education, 1881 - Food |
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Page 17
... residue , after addition of water , is filtered to remove colouring matter thrown out of solution . A further amount of colouring matter is got rid of by evaporating this filtrate to dryness , and exhausting the residue with boiling ...
... residue , after addition of water , is filtered to remove colouring matter thrown out of solution . A further amount of colouring matter is got rid of by evaporating this filtrate to dryness , and exhausting the residue with boiling ...
Page 20
... residue is next treated with water , and , after having been digested in a similar way , as in the first operation , is thrown on a filter and well washed with hot water . The insoluble portion which remains on the filter is dried and ...
... residue is next treated with water , and , after having been digested in a similar way , as in the first operation , is thrown on a filter and well washed with hot water . The insoluble portion which remains on the filter is dried and ...
Page 21
... residue , and the albumin , as before stated , by combustion with copper oxide . The difference is the per- centage of cellulose and insoluble colouring matter present in the tea . Chlorophyll and Resin . - Fifty grains of the dry and ...
... residue , and the albumin , as before stated , by combustion with copper oxide . The difference is the per- centage of cellulose and insoluble colouring matter present in the tea . Chlorophyll and Resin . - Fifty grains of the dry and ...
Page 22
... 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 mass is dried and weighed ...
... 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 mass is dried and weighed ...
Page 48
... residue ascertained . The non - fatty substances , which may have been also removed by the ether , are dissolved out with boiling water . The aqueous portion is evaporated and weighed , and the amount deducted from the first weight ...
... residue ascertained . The non - fatty substances , which may have been also removed by the ether , are dissolved out with boiling water . The aqueous portion is evaporated and weighed , and the amount deducted from the first weight ...
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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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