TITLE:
Determination and Quantification of Vanadium(V) in Environmental Samples Using Chemically Modified Chitosan Sorbent
AUTHORS:
Tharakeswar Yadamari, Kalyan Yakkala, Ramakrishna Naidu Gurijala
KEYWORDS:
Vanadium(V), Chitosan, Preconcentration, FAAS, Environmental Samples
JOURNAL NAME:
Journal of Encapsulation and Adsorption Sciences,
Vol.4 No.2,
June
27,
2014
ABSTRACT: The application of biopolymers such as chitosan is one of the emerging
sorption methods for the removal of metal ions, even at low concentrations. A
rapid, sensitive and selected method is de- scribed for preconcentrative
determination of vanadium(V) using the synthesized 3-Hydroxyben- zaldehyde-4
Amino antipyrine (HBAP), which was chemically immobilized on chitosan. This is
easy to prepare in comparison to many other sorbents. The synthesized sorbent
material was se- lective to vanadium(V) within a better response time of 30
min. The method was selective in presence of other foreign ions like Cl-,
F-, , , Na+, Ca2+, Zn2+, Fe3+, Fe2+,
Cu2+, Cr3+, EDTA, Mn2+, Co2+ and Ni2+.
The calibration plots were linear over the concentration range of 0.5 μg·L-1 to 7 μg·L-1 of vanadium(V). These values are 100 times lower than by
the direct determination of vanadium by FAAS. The developed procedure was
reproducible with a relative standard deviation of 2.84%. The developed sorbent
was successfully applied for the determination of vanadium(V) in real water and
soil samples. Unlike most preconcentration procedures, the present enrichment
method allowed for a rapid and reliable determination of vanadium(V) in
environmental samples by the simple and routinely available flame atomic
absorption spectrometry technique.