The present work addresses, a development of novel analytical reagent 2, 4-dimethyl -3H-1, 5 benzodiazepine (DBA) for determination of rhodium (III) from a mixture of alloy, using extractive spectrophotometric technique. In this research, a novel analytical reagent has been explored and with NMR, IR and mass spectrometer techniques, its characterization was also reported. A reaction between Rhodium (III) and analytical reagent (DBA), resulted in to red-coloured compound, this red colored compound offers outstanding results at constant pH 8.9, when subjected to an extraction using n-butanol as selective solvent. The Beers law is fully satisfied in concentration range of 1 mg L^-1 to 10 mg L^-1 of rhodium (III) ions. The values of maximum absorption, average molar absorption co-efficient to the coloured compound were observed to be 510 nm, 4863L mol^-1cm^-2, however sandell’s sensitivity was recorded as 0.01205 μg cm^-2. The determination of rhodium (III) metal traces from alloy mixture using DBA analytical reagent is revealed to be cheaper, effective and best than that of earlier spectrophotometric extraction methods.

rhodium (III), Spectrophotometric estimation, DBA reagent, molar extinction coefficient