AI Article Synopsis
- A novel electrode using a salicylate-selective ionophore, Sn(IV)-SAADB, shows high selectivity for salicylate ions compared to other common anions, with a specific sequence of preference.
- The electrode composition includes PVC, a plasticizer (DOP), the ionophore, and an anionic additive, and it performs linearly across a wide concentration range of salicylate with a detection limit of 2.0 x 10(-6) mol/l.
- Studies on lipophilic charged additives and UV spectra analysis suggest a mechanism for the electrode’s performance, demonstrating its effectiveness in medical analyses.
Article Abstract
A novel salicylate-selective electrode based on an organotin complex with a salicylal Schiff base of amino acid salicylaldehydeaminoacid-di-n-butyl-Sn(IV) [Sn(IV)-SAADB] as ionophore is described, which exhibits high selectivity for salicylate over many other common anions with an anti-Hofmeister selectivity sequence: Sal- >> PhCOO- > SCN- > Cl04- > I- > NO3- > NO2- > Br- > Cl- > CH3COO-. The electrode, based on Sn(IV)-SAADB, with a 30.44 wt% PVC, a 65.45 wt% plasticizer (dioctyl phthalate, DOP), a 3.81 wt% ionophore and a 0.3 wt% anionic additive is linear in 6.0 x 10(-6) - 1.0 x 10(-1) mol l(-1) with a detection limit of 2.0 x 10(-6) mol l(-1) and a slope of 62.0 +/- 1.2 mV/decade of salicylate concentration in a phosphate buffer solution of pH 5.5 at 25 degrees C. The influence on the electrode performances by lipophilic charged additives was studied, and the possible response mechanism was investigated by UV spectra. The electrode was applied to medicine analysis and the result obtained has been satisfactory.
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| http://dx.doi.org/10.2116/analsci.21.287 | DOI Listing |
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