Dergiler / Turkish Journal of Chemistry / 2005 / Cilt: 29 - Sayı: 2
Color Reaction of 2-(2-Quinolylazo)-5-Dimethylaminoaniline with Palladium and Its Application
- Sayfa
- 135–140
- DOI
- —
Özet
A new chromogenic reagent, 2-(2-quinolylazo)-5-dimethylaminoaniline (QADMAA) was synthesized. A sensitive, selective and rapid method for the determination of palladium based on the rapid reaction of palladium(II) with QADMAA was developed. In the presence of 0.5-2.5 mol L-1 of hydrochloric acid solution and cetyl trimethylammonium bromide medium QADMAA reacts with palladium to form a violet complex with a molar ratio of 1:2 (palladium to QADMAA). The molar absorptivity of the chelate is 1.35x105 L mol-1 cm-1 at 600 nm. Beer's law is obeyed in the range of 0.01 to 0.6 m g mL-1. The detection limit is 1.2 m g L-1. This method has been applied to the determination of palladium with good results.
Abstract
A new chromogenic reagent, 2-(2-quinolylazo)-5-dimethylaminoaniline (QADMAA) was synthesized. A sensitive, selective and rapid method for the determination of palladium based on the rapid reaction of palladium(II) with QADMAA was developed. In the presence of 0.5-2.5 mol L-1 of hydrochloric acid solution and cetyl trimethylammonium bromide medium QADMAA reacts with palladium to form a violet complex with a molar ratio of 1:2 (palladium to QADMAA). The molar absorptivity of the chelate is 1.35x105 L mol-1 cm-1 at 600 nm. Beer's law is obeyed in the range of 0.01 to 0.6 m g mL-1. The detection limit is 1.2 m g L-1. This method has been applied to the determination of palladium with good results.