Expeditious Extraction and Spectrophotometric Determination of Palladium (Ii) From Catalysts and Alloy Samples Using New Chromogenic Reagent

Abstract

A simple, rapid and selective method has been developed for the extractive spectrophotometric determination of palladium(II) using 4-(4'-fluorobenzylideneimino)-3-methyl-5-mercapto-1, 2, 4-triazole, (FBIMMT). In hydrochloric acid medium palladium(II) instantly forms stable yellow colored 1:1 complex with FBIMMT at room temperature, which was well extracted in chloroform. The extracted palladium(II)-FBIMMT species showed absorption maximum at 390 nm against reagent blank. The molar absorptivity and Sandell's sensitivity of palladium(II)-FBIMMT in chloroform were found to be 5.404 × 10 3 L mol -1 cm -1 and 0.0196 µg cm -2 respectively. The Beer's law was obeyed up to 17.5 µg mL -1 of palladium(II). The optimal concentration range for maximum precision was evaluated from Ringbom's plot and was found to be 5 to 17.5 µg mL -1 . To establish the optimum extraction conditions; various experimental parameters such as acidity, reagent concentration, solvents, shaking time, interference of cations and anions have been studied. To determine accuracy and precision of proposed method, determinations were carried out at five identical aliquots. The selectivity of the method was enhanced by the use of masking agents. The stoichiometry of the extracted species was assessed by Job's method, mole ratio method and verified by log-log plot. The present method was successfully applied for the separation and determination of palladium(II) from binary mixtures, multi component synthetic mixtures, synthetic mixtures corresponding to alloys and catalyst.

Synthesis of New Sulphanilamide Based Schiff Base Nickel Complexes With Study of Its Antibacterial Activity and Nanoparticle Synthesis

“…The composition of these Metal ligand complexes can be confirmed by the Slope ratio method, mole ratio method and jobs method of continuous variation 15,16 . All the results as mentioned above with the help of IR, Mass, NMR, UV-Vis spectra also reveals that the two prepared Nickel complexes have proposed 1:2 metal to ligand stoichiometry with square planar geometry.…”

Synthesis of Schiff Base as Dna Gyrase B Inhibitor, Antibacterial, Anti-Inflammatory and Antioxidant Agents

“…These constitute a ready-made building block for construction of various organic heterocycles. 21 Schiff bases and their metal complexes derived from 3-substituted-4-amino-5-mercapto-1, 2, 4-triazoles exhibit remarkable anti-breast cancer, antiinflammatory, analgesic, antidepressant, antimicrobial activities 22,23 and they are useful analytical reagents [24][25][26][27] . In view of medicinal and biological properties of 3-substituted-4-amino-5-mercapto-1, 2, 4-triazoles, substituted pyrazoles; we thought that the combination of these moieties would result in enhanced biological activities.…”