Lead Preconcentration as rac(E,E)N,N'bis(2 Chlorobenzylidene)cyclohexane1,2Diamine Complexes from Water and Tobacco Samples by Dispersive Liquid −Liquid Microextraction
Publication Type
Original research
  • Z. A. Alothman The article is published in the original. a , M. A. Habila b , E. Yilmaz 691 b , I. Warad c , and M. Soylak
A dispersive liquid⎯liquid microextraction (DLLME) procedure for determination of Pb(II) in
water and tobacco samples has been developed using rac(E,E)N,N'bis(2chlorobenzylidene)cyclohex
ane1,2diamine as a chelating agent. Factors influencing the efficiency of DLLME have been optimised,
including metal solution pH, type and amount of dispersing solvent, type and amount of extraction solvent,
amount of chelating agent and sample volume. The optimized conditions for maximum recovery were as fol
lows: sample pH 6; dispersing solvent, 500
µL of ethanol; extraction solvent, 150 µL of chloroform; chelating
agent, 150
µL of 0.01% rac(E,E)N,N'bis(2chlorobenzylidene)cyclohexane1,2diamine; and sample
volume, 15 mL. The method was validated using the certified reference material SPSWW2 waste water. The
method offered a limit of detection (LOD) of 2.6
µg/L, a limit of quantification (LOQ) of 8.5 µg/L, and a
relative standard deviation (RSD) of 5.2%
Journal of Analytical Chemistry, 2015, Vol. 70, No. 6, pp. 691–695
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