Abstract
Bis(4-(4′-nitrophenyl)azo-2-nitrophenyl) disulfide (NADS) has been synthesized for the first time and proposed for the indirect photometric determination of carbon disulfide by dithiocarbamic acid. The reaction, which involves the breaking of the disulfide bond with the formation of colored azothio anions, is carried out in a mixture of dimethylsulfoxide and n-butanol. The high value of the apparent molar absorptivity (2 × 105) is probably due to the autocatalytic character of the reaction. Using NADS, procedures for the determination of carbon disulfide in the atmospheric air of populated areas and in the model gas mixtures designed for the calibration of gas analyzers have been developed and certified. The procedures show high sensitivity and good reproducibility.
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Veksler, K.V., Volkova, E.N., Vol'berg, N.S. et al. Spectrophotometric Determination of Carbon Disulfide Using Bis(4-(4′-Nitrophenyl)azo-2-Nitrophenyl) Disulfide. Journal of Analytical Chemistry 58, 1108–1113 (2003). https://doi.org/10.1023/B:JANC.0000008947.29844.a2
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DOI: https://doi.org/10.1023/B:JANC.0000008947.29844.a2