British Abstracts: Pure chemistry and physiology. ser. A1943 |
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Trang 101
... pptd . as FePO , from an AcOH slation at pH 3.5 . Co in the filtrate is pptd . by a - nitroso - 8- aphthol and weighed as Co , O ,, or determined colorimetrically with CNS ' . Ca , Mg , Al , and the alkalis do not interfere . Bi , Ti ...
... pptd . as FePO , from an AcOH slation at pH 3.5 . Co in the filtrate is pptd . by a - nitroso - 8- aphthol and weighed as Co , O ,, or determined colorimetrically with CNS ' . Ca , Mg , Al , and the alkalis do not interfere . Bi , Ti ...
Trang 163
... pptd . with 100 % excess of Na , WO , in neutral or slightly ammoniacal solution and then heated at 800-900 ° , but even under such conditions the wt . of the ppt . is slightly > the theoretical amount . Owing to the relatively high ...
... pptd . with 100 % excess of Na , WO , in neutral or slightly ammoniacal solution and then heated at 800-900 ° , but even under such conditions the wt . of the ppt . is slightly > the theoretical amount . Owing to the relatively high ...
Trang 315
... pptd . by 3 % Mg salt of dipicrylamine , the ppt . is washed with H2O - free Et2O at 10 ° , dried at 80-90 ° , and weighed . J. J. B. Sedimentary determination of potassium and its use in soil investi- gations . See B. , 1943 , III ...
... pptd . by 3 % Mg salt of dipicrylamine , the ppt . is washed with H2O - free Et2O at 10 ° , dried at 80-90 ° , and weighed . J. J. B. Sedimentary determination of potassium and its use in soil investi- gations . See B. , 1943 , III ...
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absorption absorption spectra Acad acetate acid AcOH activity adsorption alkali Amer Anal analysis ation atoms boiling calc catalyst cellulose CHCI Chem chemical chloride CHPh CO₂ CO₂H coeff colour compounds Compt conc concn const containing converted corr cryst crystals curves decomp decreases derivatives described determined diazotised dioxan discussed effect electrolytes electron energy equilibrium ester ether EtOH formation formed Geol gives H₂ H₂O H₂SO heat hydrochloride hydrogen hydrolysed increases ionisation ions isomerised ketone lattice liquid measurements MeOH metal method methyl minerals mixtures NaOH obtained oxidation oxidised oxime particles phenols PhOH Physical Rev picrate polarisation polymerisation pptd pptn prep presence pressure reaction reagent reduced rend room temp salts semicarbazone solubility solution solvent spectra spectrum structure substances surface theory thermal titration vals vapour X-ray yield