Application of Chelating Ion Exchanger Ostsorb DTTA to Determination of Lead and Cadmium in Soils, Plants, and Fertilizers

The paper investigates a possible application of chelating cellulose ion exchanger with the functional groups of diethylenetriaminetetraacetic acid to concentrating lead and cadmium in extracts from soils and industrial fertilizers or mineralizates of plant materials. A favourable recovery of the metals needs the knowledge of the approximate content of the complex forming cations in the solutions and the suppression of formation of iron and aluminium hydroxides during modification of acidity of extracts to the value of pH 4 which is the optimum for the formation of chelates. The degree of concentrating reached the values of fE = 10 - 50, the recovery of lead and cadmium depended on the nature of sample and was in the range of R = 60 - 100%.