DETERMINATION OF CHROMIUM IN AQUATIC ENVIRONMENT BY SUBSTOICHIOMETRICTHERMAL-NEUTRON ACTIVATION-ANALYSIS

Chromium has been determined in environmental samples. The method desc ribed here involves the irradiation of environmental samples and a mug quantity of standard with thermal neutrons at the self-serve position in the CIRUS reactor, followed by dissolution of the sample and stand ard in the presence of a milligram amount of carrier. Both the sample and the standard are subjected to substoichiometric extraction under c ontrolled experimental conditions with alizarin into cyclohexane. An a liquot of the organic phase was counted on a gamma-ray spectrometer. T he concentration of Cr in water samples from Bombay and Karad City, an d the accuracy, precision and sensitivity of the method are discussed.