4, 4’-Diantipyrylmethane
(DAM): A tool for spectrophotometric microdetermination of cerium (IV)
Garg Amita, Khanna Radhika and Rathi Parveen
Res. J. Chem. Environ; Vol. 25(7); 49-55;
doi: https://doi.org/10.25303/257rjce4921; (2021)
Abstract
A simple and hasty method has been employed for the direct spectrophotometric determination
of trace amount of Ce(IV) using a complexing agent 4,4’-diantipyryl methane (DAM)
with absorption maximum at 445-455nm in acidic medium at 1.3 -1.5 pH. Molar absorptivity
and Sandell’s sensitivity were calculated to be 9.1 × 103 l mol-1 cm-1 and 0.015
μg Ce cm-2. Beer’s law was found to be defensible over the cerium concentration
range of 0-5.5 μg ml-1. Effect of large number of cations, anions and complexing
agents was also studied and several analytically important ions do not cause interference
in the procedure except thiourea and EDTA. The method has good reproducibility and
has been satisfactorily applied in the determination of cerium in samples.
