EXTRACTIVE SPECTROPHOTOMETRIC DETERMINATION OF PALLADIUM USING 2-(2-HYDROXYIMINO-1-OXOPROPYL)THIOPHENE

A simple, rapid and highly selective method for trace determination of palladium is worked out employing complexation reaction of palladium( II) with isonitrosopropionylthiophene in dilute acetic acid solution. The coloured complex is quantitatively extracted into chloroform. The method obeys Beer's law in the range 0.0-6.8 mu g Pd in 1 ml with lamb da(max) at 434 nm and has a Sandell's sensitivity of 4.3x10(-3) mu g c m(-2). The ratio of metal to ligand in the extracted complex is 1:2. U tilizing the method, the analysis of various samples has been carried out satisfactorily and the results obtained are reproducible with a re lative standard deviation of only 0.58% for ten replicate determinatio ns using 50 mu g palladium each time.