Multi-element analysis based on an automated on-line microcolumn separation/preconcentration system using a novel sol-gel thiocyanatopropyl-functionalized silica sorbent prior to ICP-AES for environmental water samples

Authors

Natalia Manousi, Aristotle University of Thessaloniki
Abuzar Kabir, Florida International University
Kenneth G. Furton, Florida International University
George A. Zachariadis, Aristotle University of Thessaloniki
Aristidis Anthemidis, Aristotle University of Thessaloniki

Date of this Version

8-1-2021

Document Type

Article

Abstract

A sol-gel thiocyanatopropyl-functionalized silica sorbent was synthesized and employed for an automated on-line microcolumn preconcentration platform as a front-end to inductively coupled plasma atomic emission spectroscopy (ICP-AES) for the simultaneous determination of Cd(II), Pb(II), Cu(II), Cr(III), Co(II), Ni(II), Zn(II), Mn(II), Hg(II), and V(II). The developed system is based on an easy-to-repack microcolumn construction integrated into a flow injection manifold coupled directly to ICP-AES’s nebulizer. After on-line extraction/preconcentration of the target analyte onto the surface of the sorbent, successive elution with 1.0 mol L−1 HNO3 was performed. All main chemical and hydrodynamic factors affecting the effectiveness of the system were thoroughly investigated and optimized. Under optimized experimental conditions, for 60 s preconcentration time, the enhancement factor achieved for the target analytes was between 31 to 53. The limits of detection varied in the range of 0.05 to 0.24 μg L−1, while the limits of quantification ranged from 0.17 to 0.79 μg L−1. The precision of the method was expressed in terms of relative standard deviation (RSD%) and was less than 7.9%. Furthermore, good method accuracy was observed by analyzing three certified reference materials. The proposed method was also successfully employed for the analysis of environmental water samples.

DOI

10.3390/molecules26154461

Recommended Citation

Manousi, Natalia; Kabir, Abuzar; Furton, Kenneth G.; Zachariadis, George A.; and Anthemidis, Aristidis, "Multi-element analysis based on an automated on-line microcolumn separation/preconcentration system using a novel sol-gel thiocyanatopropyl-functionalized silica sorbent prior to ICP-AES for environmental water samples" (2021). All Faculty. 346.
https://digitalcommons.fiu.edu/all_faculty/346