Tb3+ PVC-Membrane Electrode Based on 2-{2-(2-Anilinocarbothioyl)hydrazino)-2-oxoacetyl}-N-phenyl-1-hydrazine Carbothioamide |
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Abstract: | Abstract The polyvinyl chloride (PVC) membrane containing 2-{2-(2-anilinocarbothioyl)hydrazino)-2-oxoacetyl}-N-phenyl-1-hydrazinecarbothioamide (AHC) as a suitable iophore exhibits a Nernstian response for Tb3+ ions over a wide concentration range (1.0 × 10?6 to 1.0 × 10?2 M) with a slope of 19.6 ± 0.3 mV per decade and a limit of detection of 6.8 × 10?7 M in the pH range 3.5–8.5. The proposed sensor revealed very good selectivities (expect for the Pr3+ and Ho3+ ions) for a wide variety of other metal ions. The practical utility of the electrodes has been demonstrated by its use for the determination of Tb3+ in different solutions. |
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Keywords: | Ion-selective electrode potentiometry PVC membrane sensor |
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