Activation analysis of chromium in water matrix

Abstract

Chromium at concentrations of parts per billion in water, may be determined by activation analysis using an instrumental method preceded by concentration on anion exchange resins. Blank runs, using deionized water, are carried through the steps of preconcentration. The blank-resin and sample-resin are irradiated together with thermal neutrons, and the gamma spectrum of each is stored in half of the memory unit of a multichannel analyzer. Subtraction of the blank-resin spectrum from the sample-resin spectrum gives the⁵¹Cr peak free from interfering activities.