Abstract
The 3-methyl-1H-1,2,4-triazole-5-thiol (MTH) was used as a suitable ionophore for fabrication of a new gadolinium(III) ion selective potentiometric sensor. Nitrobenzene (NB) was used as plasticizing solvent mediator and sodium tetraphenyl borate (NaTPB) as an anion excluder. It displays a Nernstian response (19.8± 0.4 mV/decade) in the concentration range of 1.0×10-7to 1.0×10-2M with the detection limit of 7.3×10-8M. The sensor has a very short response time (<10s) and can be used the pH range of 2.9-8.4. electrode was successfully applied as an indicator for gadolinium determination in titration with EDTA.
Highlights
The quick determination of minute quantities of ionic species by simple methods is of special interest in analytical chemistry
Many techniques have been used for determination of Gd which most of them have been spectroscopic methods such as inductively coupled Plasma-mass spectrometry (ICP-MS), atomic emission spectroscopy, electron spin resonance, laser-based multi step resonance ionization, phosphorescence opto-sensing, high-resolutionI3-spectroscopy, timeresolved fluorimetry, spectrophotofluorimetric determination, quenching of gadolinium
This research focuses on the introduction of a highly Gd(IIII)-selective sensor based on 3-methyl1H-1,2,4-triazole-5-thiol (MTH) (Figure 1), as an ionophore for determination of Gd(III) ion concentration
Summary
The quick determination of minute quantities of ionic species by simple methods is of special interest in analytical chemistry. Ionselective sensors based on plasticized PVC membranes were successfully applied to the determination of many cations in various industrial, environmental and biochemical samples[1,2,3]. Gadolinium(III) Ion-Selective Electrode fluorescence and some nucleic methods.
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