Abstract
A sensitive and reproducible method for the direct spectrophotometric determination of zirconium is
reported. The method is based on zirconium forms a stable bluish violet colour complex with Chrome
Azurol S (CAS) which has maximum absorption at 598 nm at pH 4.2. The complex obeys Beer’s law in the
concentration range of 1-7 µg/mL. Detection limit, molar absorptivity and Sandell’s sensitivity were 2.42
µg/mL, 3.93 x103
L.Mol-1
.cm
-1and 2.54 x 10-4 µg/cm2
respectively. Relative standard deviation is less than
2% and correlation coefficient is 0.997. The present method is highly sensitive, selective, rapid and simple.
It is directly applicable for the determination of zirconium in environmental, industrial, water and nuclear
reprocessing samples.
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