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- [1] COMPARISON OF THE REACTIONS OF FERRIC IONS WITH CHROMAZUROL-S, ERIOCHROMAZUROL-B AND ERIOCHROMCYANINE-R IN THE PRESENCE OF SURFACE-ACTIVE SUBSTANCES AND SPECTROPHOTOMETRIC DETERMINATION OF FE(III)-IONS WITH CHROMAZUROL S-CETYLPYRIDINIUM BROMIDE SYSTEM COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS, 1980, 45 (10) : 2656 - 2669