| Autor: |
Yunsen Si, Qiufen Hu, Zhangjie Huang, Guangyu Yang, Jiayuan Yin |
| Předmět: |
|
| Zdroj: |
Turkish Journal of Chemistry; 2005, Vol. 29 Issue 2, p135-140, 6p, 1 Diagram, 2 Charts, 1 Graph |
| Abstrakt: |
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 1.35 x 105L mol-1 cm-1 at 600 nm. Beer's law is obeyed in the range of 0.01 to 0.6 µg mL-1. The detection limit is 1.2 µg L-1. This method has been applied to the determination of palladium with good results. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
