DETERMINATION OF LEAD IN ENVIRONMENTAL AND ALLOY SAMPLES

A sensitive and rapid method has been proposed for the extraction and determination of microgram amounts of lead as salicylate using tris-(2 -ethylhexyl)phosphate as an extractant. The lead salicylate complex is quantitatively extracted by TEHP(6%) from 7.5 x 10(-4) to 1 x 10(-2) M sodium salicylate. Various experimental parameters such as media con centration, TEHP concentration, effect of pH, period of shaking, strip ping agents and diverse ions have also been studied. The metal ion aft er stripping is determined spectrophotometrically. The log-log plot ha s been used to ascertain probable extractable species. The method has been applied for the analysis of alloy and air samples.