Column chromatographic preconcentration of palladium in alloys with 9,10 phenanthrenequinonemonoxime-naphthalene.
A solid chelating compound phenanthrenequinonemonoxime (PQM) supported on naphthalene provides a rapid, sensitive and economical means of preconcentration and separation of palladium from standard solutions and from synthetic samples. Palladium forms a complex with PQM supported on naphthalene in a column at pH 2.2-5.4 with a flow-rate of 1 ml/min. The metal complex and naphthalene are dissolved out from the column with 5 ml of CHCl(3) and the absorbance is measured at 430 nm or 500 nm against a reagent blank. Beers law is obeyed in the concentration range 3.0-56.0 mug and 6.0-42.0 mug at 430 nm and 500 nm respectively. The molar absorptivities are 2.10 x 10(4) and 1.69 x 10(4) 1.mole(-1).cm(-1) at 430 and 500 nm respectively.
Balani
S
S
Chemistry Department, Indian Institute of Technology, New Delhi 110016, India.
Puri
B K
BK