2005•Journal of Huaihai Institute of TechnologyRequires access
Determination of Palladium by Spectrophotometric Method with 2-Chloro-4-bromo-benzenediazoaminoazobenzene
Yanhui Li
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Abstract
The color reaction of the reagent 2-Choloro-4-bromo-benzenediazoaminoazobenzene with Pd (Ⅱ) in the presence of Trion X-100 was studied. Results show that the new color reagent reacts with Pd (Ⅱ) to form a stable red complex (1:2) in the presence of Na2B4O7-NaOH buffer at pH 10. 0. The maximum absorption wavelength and apparent molar absorptivity are 518 nm and 1. 35×105 L/(mol·cm) respectively. Beer's law is obeyed in the range of 0-16 mg/25 mL Pd (Ⅱ). The method has been applied to the determination of micro palladium (Ⅱ) with satisfactory results.