Chemical News and Journal of Industrial Science, Tomy 105-106Chemical news office., 1912 |
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Strona 3
... filtered off , thoroughly washed with water , dissolved in hydrochloric acid , precipitated with ammonium hydrate after oxidation , and weighed as oxide , or the hydrochloric acid solution was reduced and titrated with a N / 10 solution ...
... filtered off , thoroughly washed with water , dissolved in hydrochloric acid , precipitated with ammonium hydrate after oxidation , and weighed as oxide , or the hydrochloric acid solution was reduced and titrated with a N / 10 solution ...
Strona 17
... filtration , washed , and treated while still moist with boiling 95 per cent alcohol , a portion of the precipitate goes into solution . The amount of the humus precipitate so dissolved varies with the cha- racter of the soil treated ...
... filtration , washed , and treated while still moist with boiling 95 per cent alcohol , a portion of the precipitate goes into solution . The amount of the humus precipitate so dissolved varies with the cha- racter of the soil treated ...
Strona 32
... filtration , washed with alcohol , suspended in alcohol , and treated with hydrogen sulphide . After separation from ... filtered hot , and allowed to cool . On cooling , a voluminous precipitate separated from the dark coloured extract ...
... filtration , washed with alcohol , suspended in alcohol , and treated with hydrogen sulphide . After separation from ... filtered hot , and allowed to cool . On cooling , a voluminous precipitate separated from the dark coloured extract ...
Strona 33
... filtered off , washed , and treated with boiling 95 per cent alcohol , a portion of the humus pre- cipitate goes ... filtration . They were further purified by dissolving again in ether and repeating the extraction with aqueous solution ...
... filtered off , washed , and treated with boiling 95 per cent alcohol , a portion of the humus pre- cipitate goes ... filtration . They were further purified by dissolving again in ether and repeating the extraction with aqueous solution ...
Strona 41
... filtered from the insoluble products formed . The filtrate after cooling was shaken with ether and the ether evaporated . The residue so obtained was in part crystalline , the crystals having the appearance and properties of cinnamic ...
... filtered from the insoluble products formed . The filtrate after cooling was shaken with ether and the ether evaporated . The residue so obtained was in part crystalline , the crystals having the appearance and properties of cinnamic ...
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