Spectrophotometric Determination of Iridium (IV) with 3-Nitroso-4-Hydroxy-5, 6-Benzocoumarin

Autor:	R.P. Singh, R. M. Kohli, Nitin Kohli
Rok vydání:	1975
Předmět:	chemistry.chemical_compound chemistry Aqueous acetone Boiling Color reaction Analytical chemistry chemistry.chemical_element General Chemistry Iridium Nitroso Absorption (chemistry) Molar absorptivity Nuclear chemistry
Zdroj:	Journal of the Chinese Chemical Society. 22:107-111
ISSN:	0009-4536
DOI:	10.1002/jccs.197500013
Popis:	Iridium(IV) gives a deep red complex with 3-nitroso-4-hydroxy-5,6-benzo-coumarin when heated on a boiling water-bath for about 10 minutes. The complex is soluble in 50% aqueous acetone medium and exhibits maximum absorption at 520nm. Beer's law is obeyed up to 10.5 ppm of iridium at 520 nm. Molar absorptivity is 1.28×104 litre mole-1 cm-t and the sensitivity of the colour reaction is 0.015 μg Ir(IV)/cm2. The composition of the complex is 1:3 as determined by Job's and logarithmic methods. Common anions and cations do not interfere in the determination.
Databáze:	OpenAIRE
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