Optimization of Castor Oil-Based Ion Selective Electrode (ISE) with Active Agent 1,10-Phenanthroline for Aqueous Pb2+ Analysis (original) (raw)
Related papers
2020
An electroanalytical technique was devised using oil palm-based cellulose and hydroxyapatite as modifiers to carbon electrodes for Pb(II) ions detection in an aqueous system. The cyclic voltammetry scan suggested increased active binding sites and faster electron transfer with quasi-reversible redox peaks with a larger anodic current peak and smaller oxidation potential values. The optimal conditions were attained using 10% modifier at pH 2 in 0.1 M HCl, −1.2 V deposition potential, 270 s deposition time, 25 Hz frequency, 0.020 V amplitude, rotation speed of 700 rpm, and the step potential of 0.005 V. The square wave anodic stripping voltammetry established at optimum level exhibited excellent selectivity and stability from 10 ppb to 100 ppb for Pb(II) ions detection. Sharp anodic peaks were observed at -0.48 V for Pb(II) ions with the detection limit of 0.095 ± 0.32 ppb and limit of quantitation of 0.32 ± 0.32 ppb.
Fabrication and Characterization of Novel Pb(II) and Cr(III) Ion Selective and Sensitive Electrodes
European Journal of Advanced Chemistry Research
The Lead - Ion Selective Electrode (Pb-ISE) and Chromium-Ion electrode (Cr-ISE) is a method for the analytical determination of Pb(II) and Cr(III) in natural matrices. The ISEs are very sensitive, selective, and inexpensive analytical tools that can be applied to determine Pb(II) and Cr(III) in soil samples due to relatively high limits of detection. In the present work, we examined the possibility of using solid contact ISEs in soil analysis, combined with a simplified extraction method based on dilute HNO3 that can be carried out at the field site. The Ionic strength of lead and Chromium is measured by using The Pb-ISE and Cr-ISE were fabricated and their characteristics were studied separately and the Ionic strength of Pb(II) and Cr(III) was measured by using them, the results were found to be quite satisfactory.
Studies with an inorganic ion-exchange membrane exhibiting selectivity for Pb(II) ions
Talanta, 1986
A solid membrane electrode made with titanium arsenate as membrane material and “Araldite” as binder has been used to measure the activity of lead in the concentration range from 0.1 M to 5 × 10−6M. The electrode is unaffected by many cations, nitrate and acetate. The response time is 40–60 sec over the whole concentration range (in a static system) and the electrode has a working life of at least four months. The electrode can work in the pH range 2–5 and is tolerant of ethanol up to a content of 30% . It has been successfully used for end-point indication in potentiometric titration of lead. A membrane treated with cationic surfactant exhibits better selectivity.