materials-summit-separation-summit-2018-posters

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O c t o b e r 1 9 - 2 0 , 2 0 1 8 | T o k y o , J a p a n

Materials Summit 2018 & Separation Summit 2018

Materials Science and Nanotechnology

Volume 2

ADVANCED MATERIALS AND POLYMER SCIENCE

SEPARATION TECHNIQUES

International Conference on

International Conference and Expo on

Joint Event on

OF EXCELLENCE

IN INTERNATIONAL

MEETINGS

YEARS

Mater Sci Nanotechnol 2018, Volume 2

A SIMPLE ELECTROPHORESIS METHOD FOR THE SIMULTANEOUS

DETERMINATION OF CHROMIUM AND VANADIUM AT TRACE LEVELS IN

REAL AND ENVIRONMENTAL SAMPLES

M Jamaluddin Ahmed

University of Chittagong, Bangladesh

very simple, selective and highly sensitive capillary electrophoretic method for the simultaneous determination of chromium

(III) and vanadium (V) with Mo(VI)-P(V) reagent has been developed. A Mo(VI)-P(V) reagent reacted with a mixture of trace

amounts of chromium (III) and vanadium (V) to form the stable heteropoly anions in 0.1M acetate buffer (pH 2.0) at room tem-

perature (25±50C). Both anionic forms of chromium (III) and vanadium (V) can be determined simultaneously by capillary elec-

trophoresis with direct UV detection at 254-nm. The pre-column complex formation reaction is instantaneous, and absorbance

remains stable for 24h. Linear calibration curves were obtained in the concentration ranges of 0.06–60-mgL

-1

and 0.05–80-

mgL

-1

of Cr(III) and V(V), respectively; the detection limits were 6.0-μg L

-1

and 5.0-μg L

-1

, respectively. The influence of several

experimental parameters on both sensitivity and efficiency was investigated. The interference from over 50 cations, anions and

complexing agents has been investigated at 1-mgL

-1

of Cr and V, respectively. The unique selectivity and sensitivity of the method

allowed its direct application to the determination of Cr and V in complex matrices of certified reference materials and synthetic

seawater. The developed was also used successfully in the determination of chromium and vanadium in environmental waters

(tap, well and lake). The method has high precision and accuracy (s=±0.02 for 0.5 mg L

-1