Abstract
Small quantities of oxygen react in the presence of an ammoniacal solution of ammonium-chloride with metallic copper. The dissolved copper is determined iodometrically. The apparatus of uhrich, roberts, and levin was simplified. Sulphurdioxyde, hydrogensulphide and mercaptans and acetylene interfere and have to be eliminated. A method was developed for determining small quantities of oxygen in gaseous mixtures with high acetylene contents. By this method quantities as small as 0.001 % oxygen in mixtures containing acetylene can be determined.
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