Analytical Methods for Germanium

Synthesis of isomorphously substituted extra-large pore UTL zeolites

“…GeCl 4 was extracted from the filtrate with CCl 4 and quantitatively determined by back-complexation titration as described elsewhere. 53 The amount of boron was determined by potentiometric titration of filtrate muriatic solution. The exact concentration of boric acid was established by the position of 2 nd maximum on the differentiate titration curve dpH/dV À V. The titre of NaOH was determined by potentiometric titration with standard solution of oxalic acid.…”

Determination of Germanium by Heteropoly Blue Method

“…Division of Analytical Chemistry, 132nd meeting, ACS, New York, N. Y., September 1957. method. Several modifications of the method reported in the literature have been summarized by Krause and Johnson (7). Most publications refer to the instability of the yellow molybdogermanic acid complex; however, no specific study was made of its rates of formation and decomposition under the conditions of the recommended Effect of slight variations in acidity and amount of molybdate ommended that the yellow complex be promptly or immediately reduced to the heteropoly blue complex.…”

Determination of Silicon, Germanium, and Tin in Their Volatile Organo Compounds

“…Oxidation by fusion procedures with sodium peroxide in Parrtype bombs has been extensively carried out with organosilicon compounds (1,9,12) only. For volatile substances, this method is the most reliable but requires about 24 According to Krause and Johnson (7), the use of the Parr bomb for analysis of organogermanium compounds gave inconclusive results in preliminary experiments, and its use does not seem to have been extended to organotin compounds.…”