caa a22 4500 463219856 CHVBK 20180405153208.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1134/S1061934807040089 doi (NATIONALLICENCE)springer-10.1134/S1061934807040089 Simultaneous determination of zinc and copper(II) with 1-(2-pyridylazo)2-naphthol in micellar media by spectrophotometric H-point standard addition method [Elektronische Daten] [M. Arvand, S. Abolghasemi, M. Zanjanchi] The H-point standard addition method (HPSAM) was applied to handling spectrophotometric data for simultaneous determination of Zn2+ and Cu2+ or selective determination of Zn2+ in the presence of Cu2+. The ligand 1-(2-pyridylazo)2-naphthol (PAN) and its metal complexes (Zn-PAN and Cu(II)-PAN) were made water-soluble by the neutral surfactant Triton X-100, and therefore, no extraction with organic solvents was required. The method is based on the difference in absorbance of formed complexes between Zn2+ and PAN, at two different wavelengths at pH = 9.2. The formation of both the complexes was complete within five minutes. Zn2+ can be determined in the range of 0.2-25 µg/mL with satisfactory accuracy and precision in the presence of excess of Cu2+ and most other metal ions. Interference effects of common anions and cations were studied. Under working conditions, the proposed method was successfully applied to the simultaneous determination of Zn2+ and Cu2+ in several real and synthetic mixtures with different concentration ratio of Zn2+ and Cu2+. Pleiades Publishing, Ltd., 2007 Arvand M. Chemistry Department, College of Science, Guilan University, P.O. Box: 1914, Rasht, Iran aut Abolghasemi S. Chemistry Department, College of Science, Guilan University, P.O. Box: 1914, Rasht, Iran aut Zanjanchi M. Chemistry Department, College of Science, Guilan University, P.O. Box: 1914, Rasht, Iran aut Journal of Analytical Chemistry Nauka/Interperiodica 62/4(2007-04-01), 342-347 1061-9348 62:4<342 2007 62 10809 https://doi.org/10.1134/S1061934807040089 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807040089 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Arvand M. Chemistry Department, College of Science, Guilan University, P.O. Box: 1914, Rasht, Iran aut NATIONALLICENCE 700 1- Abolghasemi S. Chemistry Department, College of Science, Guilan University, P.O. Box: 1914, Rasht, Iran aut NATIONALLICENCE 700 1- Zanjanchi M. Chemistry Department, College of Science, Guilan University, P.O. Box: 1914, Rasht, Iran aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/4(2007-04-01), 342-347 1061-9348 62:4<342 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer