Chemical News and Journal of Industrial Science, Tomy 3-4Chemical news office., 1861 |
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Strona 36
... evaporated to dryness , and the residue , after ignition at a low red heat to destroy the organic matter , treated with an excess of hydrochloric acid . This was expelled by evaporation , and the dried residue heated to about 250 ° , to ...
... evaporated to dryness , and the residue , after ignition at a low red heat to destroy the organic matter , treated with an excess of hydrochloric acid . This was expelled by evaporation , and the dried residue heated to about 250 ° , to ...
Strona 348
... evaporated to a small bulk , which causes a certain amount of resinous matter to be separated . This evaporated solution is then filtered , and the colouring matter precipitated by means of an alkali , it is then collected on a filter ...
... evaporated to a small bulk , which causes a certain amount of resinous matter to be separated . This evaporated solution is then filtered , and the colouring matter precipitated by means of an alkali , it is then collected on a filter ...
Strona 199
... evaporated , the same change takes place with the organic matter ; it turns dark ; from the syrupy residue , the saline admixtures are thrown down by strong alcohol , but the colouring matter is dissolved , and , on evaporation , a ...
... evaporated , the same change takes place with the organic matter ; it turns dark ; from the syrupy residue , the saline admixtures are thrown down by strong alcohol , but the colouring matter is dissolved , and , on evaporation , a ...
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