Summary
Diethazine hydrochloride forms an yellowish-green complex with platinum(IV) in sodium acetate-hydrochloric acid buffer containing copper catalyst. The complex has an absorption maximum at 404nm and its molar absorptivity is 1.083×104l mole−1cm−1. The sensitivity is 18 ng/cm2 for logI 0/I=0.001. Beer's law is valid over the concentration range 0.5–12.0 ppm. The composition of the complex as determined by the continuous variations, mole ratio and slope ratio methods is 1∶1 and the apparent stability constant of the complex at pH 2.3 and 27° has the log K value of 5.83. The effects due to pH, reagent concentration, copper concentration, time and diverse ions are reported.
Zusammenfassung
10-(2-Diäthylaminoäthyl)-phenothiazinhydrochlorid (DH) bildet mit Platin in Natriumacetat-Salzsäure-Puffer, der Kupfer als Katalysator enthält, eine gelbgrüne Komplexverbindung. Diese hat ein Absorptionsmaximum bei 404 nm, ihre molare Extinktion beträgt 1,083×104l·mol−1·cm−1. Die Empfindlichkeit entspricht 18 ng/cm2 für logI 0/I=0,001. Das Beersche Gesetz gilt zwischen 0,5 und 12,0 ppm. Der Komplex ist im Verhältnis 1∶1 zusammengesetzt. Die scheinbare Stabilitätskonstante bei pH 2,3 und 27° C entspricht logK=5,83. Über den Einfluß von pH, Reagenskonzentration, Kupferkonzentration, Zeit und verschiedene Fremdionen wurde berichtet.
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Gowda, H.S., Jagadeesh, K.S. Spectrophotometric determination of platinum using the diethazine hydrochloride complex. Mikrochim Acta 71, 183–190 (1979). https://doi.org/10.1007/BF01196404
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DOI: https://doi.org/10.1007/BF01196404