- 作者: Nitin Kohli; R. M. Kohli; R. P. Singh
- 作者服務機構: Contribution from the Department of Chemistry, University of Delhi, Delhi-110007
- 中文摘要: 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 520nm. Molar absorptivity is 1.28×10.. litre mole¯1 cm¯1 and the sensitivity of the colour reaction is 0.015μg 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.
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