Extraction-absorptiometric determination of chromium by acridine yellow in natural and waste waters

In interaction of Cr(VI) anion with acridine basic dye - acridine yellow has been studied. The colored ionic associate could be extracted by dichlorethane: acetone (3:1) binary mixture in Ph 1 to 2 N hydrochloric acid solution. Optimal concentration of reagent is 1,83·10-3-2,94·10-3M. The celebration graph obeyed Beer's law over the range 0,625-10 mkg Cr/ml and the apparent molar absorptivity of the extract at 454 nm was 3,4·104±500 l mol-1cm1. The molar ratio between Cr(VI) anion and acridine yellow in ionic associate has been determined by method Asmuse which is (1:1). The influence of interfering elements on the determination of chromium has been studied. The elaborated methods has been applied for determination of Cr(VI) in natural and waste waters