The colorimetric determination of benzene vapors in air

Abstract

A simple method is developed for the determination of small amounts of benzene vapor in air in the presence of its homologues. The chromic acid method of BAERNSTEIN¹ (1943) for eliminating the interference of the homologues is combined with the procedure of DOLIN2,3 (1943, 1947) who makes the final colorimetric measurement after separating the colored matter by extraction with ethyl ether.