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COLORIMETRIC DETERMINATION OF TRACE METALS IN BEER AND IN BREWING MATERIALS IV. DETERMINATION OF COPPER
Author(s) -
Andrews J.,
Stringer W. J.
Publication year - 1953
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1953.tb02711.x
Subject(s) - brewing , colorimeter , copper , chemistry , carbon tetrachloride , sodium diethyldithiocarbamate , residue (chemistry) , colorimetry , chromatography , inorganic chemistry , organic chemistry , physics , quantum mechanics , fermentation
Copper is determined in the residue obtained after wet oxidation of beer or brewing materials as described in a previous paper (this Journal , 1951, 363). When the residue is treated with sodium diethyldithiocarbamate, a compound is formed which is soluble in carbon tetrachloride giving a yellow solution. The yellow colour of this solution may be matched by glass slides in a Lovibond tintometer or evaluated in a photoelectric colorimeter. The copper is determined by reference to standard curves.