Chemical News and Journal of Industrial Science, Tomy 131-132Chemical news office., 1925 |
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Strona 19
... precipitate the barium sulphate which occludes PbS . has been successfully practised in deter- mination of minute quantities of lead in water . The residue treated with strong sul- phuric acid to decompose the Pbs and then . extracted ...
... precipitate the barium sulphate which occludes PbS . has been successfully practised in deter- mination of minute quantities of lead in water . The residue treated with strong sul- phuric acid to decompose the Pbs and then . extracted ...
Strona 41
... precipitate acocantherine -- and the precipi- tate was dissolved in water and again brought down by Am2SO . The precipitate was a yellow gum , exceedingly bitter , and giving the absorption spectrum described in Part I. in concentrated ...
... precipitate acocantherine -- and the precipi- tate was dissolved in water and again brought down by Am2SO . The precipitate was a yellow gum , exceedingly bitter , and giving the absorption spectrum described in Part I. in concentrated ...
Strona 65
... precipitate of zinc . Del Campo ( 107 ) states that 0.005 mgs . of zinc in 1 cc . may be detected by the blue coloration produced by the addition of ammonia and resorcinol , which is changed to red by HCl . A study of the literature in ...
... precipitate of zinc . Del Campo ( 107 ) states that 0.005 mgs . of zinc in 1 cc . may be detected by the blue coloration produced by the addition of ammonia and resorcinol , which is changed to red by HCl . A study of the literature in ...
Strona 66
... precipitate with wash water as a result of hydrolysis , and secondly , the effect . of sodium and ammonium phosphate as pre- cipitants in the formation of the ZnNH , PO ... . To this may be added comparative results as to weighing the ...
... precipitate with wash water as a result of hydrolysis , and secondly , the effect . of sodium and ammonium phosphate as pre- cipitants in the formation of the ZnNH , PO ... . To this may be added comparative results as to weighing the ...
Strona 67
... precipitate with HCI and evaporate with H2SO , to dryness . F. Seeligmann ( 27 ) adds NH OH to the solution of zinc , then ( NH ) , S and boils until the precipitate coagulates . The ZnS is then filtered , ignited , and finally heated ...
... precipitate with HCI and evaporate with H2SO , to dryness . F. Seeligmann ( 27 ) adds NH OH to the solution of zinc , then ( NH ) , S and boils until the precipitate coagulates . The ZnS is then filtered , ignited , and finally heated ...
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