Application of cloud point preconcentration and flame atomic absorption spectrometry for the determination of cadmium and zinc ions in urine, blood serum and water samples

Ardeshir Shokrollahi, Somayeh Joybar, Hoda Elias Haghighi, Khodabakhsh Niknam, Ebrahim Niknam
2013 Química Nova  
Recebido em 27/3/12; aceito em 20/10/12; publicado na web em 21/2/13 A simple, sensitive and selective cloud point extraction procedure is described for the preconcentration and atomic absorption spectrometric determination of Zn 2+ and Cd 2+ ions in water and biological samples, after complexation with 3,3',3",3'"-tetraindolyl (terephthaloyl) dimethane (TTDM) in basic medium, using Triton X-114 as nonionic surfactant. Detection limits of 3.0 and 2.0 μg L -1 and quantification limits 10.0 and
more » ... n limits 10.0 and 7.0 μg L -1 were obtained for Zn 2+ and Cd 2+ ions, respectively. Relative standard deviation was 2.9 and 3.3, and enrichment factors 23.9 and 25.6, for Zn 2+ and Cd 2+ ions, respectively. The method enabled determination of low levels of Zn 2+ and Cd 2+ ions in urine, blood serum and water samples.
doi:10.1590/s0100-40422013000300004 fatcat:tdrox5ndnndmhocxaupsp5s7uq