“…Furthermore, the increase in potential below pH 2.4 is probably due to the reason that protonation of CLP was promoted at such high acidity, leading to an amount of generated CLP cation. Or electrode membrane may extract H + from the medium at such lower pH and simultaneous response to H + and CLP cation [ 27 , 28 ]. Fig.…”
A novel modified ion selective electrode based on Fe2O3-clorprenaline/tetraphenylborate nanospheres (Fe2O3-CLPT NSs) as electroactive materials for the determination of clorprenaline hydrochloride (CLP) is described. The α-Fe2O3 nanoparticles (NPs) were prepared by hydrothermal synthesis, then self-assembled on CLP/tetraphenylborate (TPB) to form Fe2O3-CLPT NSs, which were used as a potentiometric electrode for analyte determination innovatively. The Fe2O3-CLPT NSs modified electrode exhibited a wider concentration range from 1.0 × 10−7 to 1.0 × 10−1 mol/L and a lower detection limit of 3.7 × 10−8 mol/L compared with unmodified electrodes. The selectivity of the modified electrode was evaluated by fixed interference method. The good performance of the modified electrode such as wide pH range (2.4–6.7), fast response time (15 s), and adequate lifetime (14 weeks) indicate the utility of the modified electrode for evaluation of CLP content in various real samples. Finally, the modified electrode was successfully employed to detect CLP in pork samples with satisfactory results. These results demonstrated the Fe2O3-CLPT NSs modified electrode to be a functional and convenient method to the field of potentiometry determination of CLP in real samples.
“…Furthermore, the increase in potential below pH 2.4 is probably due to the reason that protonation of CLP was promoted at such high acidity, leading to an amount of generated CLP cation. Or electrode membrane may extract H + from the medium at such lower pH and simultaneous response to H + and CLP cation [ 27 , 28 ]. Fig.…”
A novel modified ion selective electrode based on Fe2O3-clorprenaline/tetraphenylborate nanospheres (Fe2O3-CLPT NSs) as electroactive materials for the determination of clorprenaline hydrochloride (CLP) is described. The α-Fe2O3 nanoparticles (NPs) were prepared by hydrothermal synthesis, then self-assembled on CLP/tetraphenylborate (TPB) to form Fe2O3-CLPT NSs, which were used as a potentiometric electrode for analyte determination innovatively. The Fe2O3-CLPT NSs modified electrode exhibited a wider concentration range from 1.0 × 10−7 to 1.0 × 10−1 mol/L and a lower detection limit of 3.7 × 10−8 mol/L compared with unmodified electrodes. The selectivity of the modified electrode was evaluated by fixed interference method. The good performance of the modified electrode such as wide pH range (2.4–6.7), fast response time (15 s), and adequate lifetime (14 weeks) indicate the utility of the modified electrode for evaluation of CLP content in various real samples. Finally, the modified electrode was successfully employed to detect CLP in pork samples with satisfactory results. These results demonstrated the Fe2O3-CLPT NSs modified electrode to be a functional and convenient method to the field of potentiometry determination of CLP in real samples.
“…The obtained electrode was very selective to copper over all interfering ions (log K pot Cu/M ≤ −3) except lead, which was the most interfering ion (logK pot Cd/Pb ≤ −2.1). This was not overly surprising because lead is a well-known interferent in the case of copper selective electrodes [37,38]. The improvement of the selectivity of the nanocomposite-based electrode can be explained by the fact that the addition of the nanocomposite increases the ionic strength of the membrane and thus facilitates the selective transport of the main ion to the membrane phase.…”
A new copper sensitive all solid-state ion-selective electrode was prepared using multiwalled carbon nanotubes-ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate) nanocomposite as an additional membrane component. The effect of nanocomposite content in the membrane on the electrode parameters was investigated. The study compares, among others, detection limits, sensitivity, and the linearity ranges of calibration curves. Content 6 wt.% was considered optimal for obtaining an electrode with a Nernstian response of 29.8 mV/decade. An electrode with an optimal nanocomposite content in the membrane showed a lower limit of detection, a wider linear range and pH range, as well as better selectivity and potential stability compared to the unmodified electrode. It was successfully applied for copper determination in real water samples.
“…In this context, the electrochemical method of analysis is found to be cheaper and can provide high sensitivity, long-term response stability, and good assay reproducibility for analytes that are amenable to such detection. [12][13][14] It is well documented that azide ions are electrochemically active at carbon, platinum and gold electrodes 1,15 but surprisingly, there have been only a few reports on the electrochemistry of this anion probably due to the high overpotential required for its oxidation. Hence, to decrease the required overpotential for azide oxidation, it is necessary to modify the electrode surface.…”
A nanocomposite containing ferrocenoyl glutaric acid hydrazone and multiwalled carbon nanotubes (MWCNTs) has been synthesized and characterized for its structural, morphological and electrochemical properties.
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