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Chromatography 2016
September 21-23, 2016
Volume 7, Issue 5(Suppl) J Chromatogr Sep Tech 2016
ISSN: 2157-7064 JCGST, an open access journal
conferenceseries .com
September 21-23, 2016 Amsterdam, Netherlands
World Congress on Chromatography
SpectrophotometricdeterminationofCr(iii)andPb(ii)using5,11,17,23-tetra[(2-ethylacetoethoxyphenyl)
(azo) phenyl]calix[4]arene
Nguyen Khanh Hoang
Industrial University of Ho Chi Minh City, Vietnam
New complexes of 5, 11, 17, 23-tetra[(2-ethyl acetoethoxyphenyl)(azo)phenyl]calix[4]arene (TEAC) with Pb(II) and
Cr(III) were prepared in basic solution with a mixture of MeOH and H2O as solvent. The ratio of TEAC and metal
ions complexation was found to be 1:1 under investigated condition. The complex formation constants (based on Benesi–
Hildebrand method) for TEAC-Pb(II) and TEAC-Cr(III) were 4.03×104 and 1.2×104, respectively. Additionally, the molar
extinction coefficients were 5×104 and 1.42×104 for TEAC-Pb(II) and TEAC-Cr(III), respectively. The H-point standard
addition method (HPSAM) has been applied for simultaneous determination of complexes formation of Cr(III)/Pb(II) and
TEAC with concentration from 2:1 to 1:20 (w/w). The proposed method was successfully utilized to invest lead and chromium
content in plating wastewater samples. The results for several analyzed samples were found to be in satisfied agreement with
those acquired by using the ICP-MS technique.
Biography
Le Van Tan obtained his PhD in Chemistry department in 1997 from Ha Noi National University, Vietnam. He completed his Post-doctoral in Seoul National
University during 2004-2005 (Korea) and was Visiting Professor in Technical University Kaiserslautern during 2006, 2010 (Germany). He has published and
presented 80 papers in International and National Conferences and journals. Currently, he is working as the Professor of this University and Professor of Chemical
Engineering in Industrial University of Ho Chi Minh City. He is a member of Vietnam Chemical Society, Vietnam Analytical Chemical Society, ASC member and also
Technical Committee for many international conferences on chemistry and chemical engineering in Japan, Singapore, Hong Kong, Thailand and so on. He is on
Editorial Board of Vietnam Journal of Chemistry, Reviewer for the International Journal of Chemical and Biomolecular Science and many international journals on
Chemistry. His interested research areas are finding new organic reagent for analytical chemistry; advanced separations and environment; postharvest technology.
Nguyen Khanh Hoang, J Chromatogr Sep Tech 2016, 7:5(Suppl)