Vol. 7 (2024), Article ID 246164, 8 pages
Research Article
Design and Construction of a Novel Green Optode for Hafnium Determination in Real Environmental Samples
Abdullah A. A. Sari,1 K. F. Dbbabi,1,2 Refat El-Sayed,1,3 Alaa S. Amin,3 and Eslam M. I. Moustafa3
1Department of Chemistry, University College in Al-Jamoum, Umm Al-Qura University, Makkah 21955, Saudi Arabia
2Department of Chemistry, Higher Institute of Applied Sciences and Technology of Mahdia, University of Monastir, Monastir, Tunisia
3Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
Received 20 December 2023; Revised 31 March 2024; Accepted 17 April 2024; Published 17 December 2024
Abdullah A. A. Sari, K. F. Dbbabi, Refat El-Sayed, Alaa S. Amin, and Eslam M. I. Moustafa, Design and Construction of a Novel Green Optode for Hafnium Determination in Real Environmental Samples, Journal of Transition Metal Complexes, 7 (2024), art246164. doi:10.32371/jtmc/246164
A highly selective and sensitive Hf optode was developed, which uses a triacetylcellulose membrane to immobilize 4-(2-benzothiazolylazo)2,3-biphenyldiol (BTABPD). The membrane optode responds to hafnium ions by color changing reversibly from yellow-orange to pink in thiel buffer at pH 5.0. The proposed membrane under optimum experimental conditions exhibits a linear dynamic range of 5.0–185 ng cm−3 of the Hf(IV) with detection and quantification limits of 1.58 and 4.95 ng cm−3, respectively. The newly developed optode has a response time of 15–30 s based on the Hf4+ ion level. The optode’s response is determined by the pH range of 4.5–5.5. The complex’s quantification and detection limits, Sandell sensitivity, molar absorptivity, Ringbom, calibration ranges, and relative standard deviation (RSD) have all been accurately calculated. The presented optode records fast response time, low detection limit, and, most significantly, excellent selectivity towards a number of lanthanide and transition ions (Sc3+, Y3+, La3+, Ce3+, Gd3+, Sm3+, Lu3+, Tm3+, Ho3+, Dy3+, Eu3+, Cd2+, Cu2+, Ni2+, Co2+, Pb2+, Bi3+, Al3+, Sn2+, Mn2+, Tl+, Ag+, Zn2+, Fe2+, Cr3+, and Zr4+ ions). The optode was regenerated successfully with thiourea and its response was reproducible (RSD ≤ 1.9%) and reversible. The proposed optode was successfully applied to detect Hf(IV) ions in real samples.
optode; hafnium determination; 4-(2-benzothiazolylazo)2,3-biphenyldiol; triacetylcellulose; environmental analysis
Copyright © 2024 Abdullah A. A. Sari et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.