Speciation of Cr(III) and Cr(VI) in potable waters by using activated neutral alumina as collector and ET-AAS for determination.
The speciation of Cr(III) and Cr(VI) has been performed by using activated neutral alumina as adsorbent. Both species were quantitatively adsorbed on a small column filled with neutral alumina. The adsorbed Cr(III) was eluted with 4 mol L(-1) HNO(3) and Cr(VI) with 1.0 mol L(-1) ammonia solution. Recoveries of Cr(III) and Cr(VI) were 99% and 100%, respectively. Using ET-AAS for Cr determination the limit of detection in the sample was 0.01 microg L(-1). The combined procedure is fast and sensitive. It can be applied for routine analysis of water samples at sub-microg L(-1) levels with a relative standard deviation (RSD) of 2-10% (three determinations).
Sahayam
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AC
National Centre for Compositional Characterisation of Materials (CCCM), Bhabha Atomic Research Centre, E.C.I.L. (P.O.), Hyderabad-500 062, India. acs@cccm1.ernet.in
D000537:Aluminum Oxide / Q000737:chemistry*; D002857:Chromium / Q000032:analysis* / Q000145:classification*; D004563:Electrochemistry; D005618:Fresh Water / Q000737:chemistry*; D013054:Spectrophotometry, Atomic / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000145:classification; D015034:Zinc Oxide / Q000737:chemistry
D014874:Water Pollutants, Chemical; D002857:Chromium; D000537:Aluminum Oxide; D015034:Zinc Oxide