caa a22 4500 463220781 CHVBK 20180405153211.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1134/S1061934807110044 doi (NATIONALLICENCE)springer-10.1134/S1061934807110044 Modified analcime loaded with zincon as a useful material for the separation and preconcentration of trace palladium and its determination by third-derivative spectrophotometry [Elektronische Daten] [M. Taher, A. Mostafavi, S. Mohammadi Mobarakeh] This work assesses the potential of natural analcime zeolite as a sorbent for the preconcentration of palladium. Palladium is quantitatively retained on modified analcime zeolite loaded with zincon using the column method in the pH range from 2.5 to 3.5 at a flow rate of 1 mL/min. The palladium complex was removed from the column with 5.0 mL of dimethylsulfoxide (DMSO) and determined by third-derivative spectrophotometry. The detection limit is 0.03 μg/mL (signal-to-noise ratio = 3) in the final solution. Since it is possible to retain 0.15 μg of palladium from 600 mL of solution passing through the column, elution with 5.0 mL of DMSO gives a detection limit of 0.25 ng/mL for palladium in the initial aqueous solution. The calibration curve is linear over the range 0.1 to 5.0 μg/mL of palladium(II) in the final solution with a correlation coefficient of 0.9996. Seven replicated determinations of 5.0 μg of palladium in 5.0 mL dimethylsulfoxide gave a mean d 3 A/dλ3 (peak-to-peak signal between λ2 = 625 and λ1 = 654 nm) of 0.64 with a relative standard deviation of 1.2%. The sensitivity of the method (d 3 A/dλ3) is 0.5843 mL/μg of palladium(II) from the slope of the calibration curve. The interference of a large number of anions and cations has been studied and the optimized conditions developed were utilized for the determination of trace palladium in various synthetic and water samples. Pleiades Publishing, Ltd., 2007 Taher M. Department of Chemistry, Shahid Bahonar University, Kerman, Iran aut Mostafavi A. Department of Chemistry, Shahid Bahonar University, Kerman, Iran aut Mohammadi Mobarakeh S. Department of Chemistry, Shahid Bahonar University, Kerman, Iran aut Journal of Analytical Chemistry Nauka/Interperiodica 62/11(2007-11-01), 1022-1027 1061-9348 62:11<1022 2007 62 10809 https://doi.org/10.1134/S1061934807110044 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807110044 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Taher M. Department of Chemistry, Shahid Bahonar University, Kerman, Iran aut NATIONALLICENCE 700 1- Mostafavi A. Department of Chemistry, Shahid Bahonar University, Kerman, Iran aut NATIONALLICENCE 700 1- Mohammadi Mobarakeh S. Department of Chemistry, Shahid Bahonar University, Kerman, Iran aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/11(2007-11-01), 1022-1027 1061-9348 62:11<1022 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer