Untersuchungen zur anwendung ternärer komplexe in der photometrie—III: Die bestimmung des titanium(iv) mit brompyrogallolrot in gegenwart von nitrilotriessigsäure bzw. ethylenediamintetraessigsäure

As part of a continued investigation of the analytical applications of ternary complexes, the systems Ti(IV)/BPR, I), Ti(IV)/BPR/EDTA (II), and Ti(IV)/BPR/NTA (III), where BPR = Bromopyrogallol Red, have been investigated and compared in terms of working concentration range, molar absorptivity, standard deviation, coefficient of variation, calibration sensitivity, limit of detection and of determination. A novel way of summarizing the effects of interferences of a large group of ions (some 47 in all) is presented. The results show that the ternary systems, in particular system II, have a better selectivity than the simple binary system I of titanium with Bromopyrogallol Red.