Chemia Analityczna Volume 46, Number 5 
(September - October 2001)

An UV-VIS Spectrometric Study of Reaction Between Carbon Monoxide and Nitrosobenzene, in Presence of Palladium Ion

by Victor David, Vasilica Schiopu and Valerica Dumitrescu

University of Bucharest, Faculty of Chemistry, Department of Analytical Chemistry, Sos. Panduri, no. 90, Bucharest - 5, Romania
 

Key words:  carbon monoxide, nitrosobenzene, hexamethylphosphotriamide, palladium

The method is based on the reaction between carbon monoxide and nitrosobenzene, in presence of divalent palladium. Hexamethylphosphotriamide (HMPA) water mixture used as the solvent. The reduction of Pd(II) to Pd(0) is followed by the reduction of the nitroso- group from the organic reagent. Two spectral bands assigned to nitrosobenzene (282 and 308 nm) can be used in the indirect determination of CO. The detection limit is 45 ppm (v/v) after at least two hours from bubbling of the gaseous sample.


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