%0 Journal Article
%T Spectrophotometric determination of fluoride in drinking water using aluminium complexes of triphenylmethane dyes
%A Z Barghouthi
%A S Amereih
%J Water SA
%D 2012
%I Water Research Commission
%X A sensitive spectrophotometric determination of fluoride in drinking water has been developed using aluminium complexes of triphenylmethane dyes (chrome azurol B and malachite green) as spectrophotometric reagents. The method allowed a reliable determination of fluoride in the range of 0.5¨C4.0 mg¡¤l-1 for chrome azurol B and 0.0¨C2.0 mg¡¤l-1 for malachite green. The molar absorptivity for the complexes of chrome azurol B at 582 nm and malachite green at 622 nm is 1.44 ¡Á 104 and 2.56 ¡Á 104 l¡¤mol-1¡¤cm-1, respectively. The sensitivity, detection limit, quantitation limit, and percentage recovery for 1.5 mg¡¤l-1 fluoride for the method using chrome azurol B were found to be 0.125 ¡À 0.003 ¦Ìg¡¤ml-1, 0.2 mg¡¤l-1, 0.5 mg¡¤l-1, and 97.1 ¡À 4.2, respectively, and for malachite green were 0.143 ¡À 0.002 ¦Ìg¡¤ml-1, 0.1 mg¡¤l-1, 0.3 mg¡¤l-1, and 97.9 ¡À 4.1, respectively.
%U http://www.ajol.info/index.php/wsa/article/view/81032