Bis (trans-cinnamaldehyde) ethylene diimine dibromonickel (II) complex as a neutral carrier for salicylate-selective liquid membrane and coated graphite sensors |
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Authors: | Ganjali M R Kiani-Anbouhi R Pourjavid M R Salavati-Niasari M |
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Institution: | a Department of Chemistry, Tehran University, P.O. Box 14155-6455, Tehran, Iran b Department of Chemistry, Kashan University, Kashan, Iran |
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Abstract: | A salicylate PVC-based membrane (SPME) and a coated graphite membrane (SCGE) electrodes by using a new tetracoordinate organonickel complex as ion carrier were prepared. Both sensors show a Nernstian response to salicylate ions over a very wide concentration ranges (1.0×10−5-1.0×10−1 M for SPME and 1.0×10−6-1.0×10−2 M for SCGE) in the pH of 7.0. The best selectivities were obtained for the membrane incorporating 30% PVC, 63% plasticizer, 2% cationic additive and 5% ionophore. The electrodes possess satisfactory reproducibility, very short response time (∼10 s) in the whole concentration ranges, and excellent discriminating ability for salicylate ions with respect to the most common organic and inorganic anions. The detection limits of proposed sensors are 5.0×10−6 and 7.0×10−7 M for SPME and SCGE, respectively. The electrodes were successfully used for determination of salicylate in biological samples. |
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Keywords: | Salicylate ion-selective electrode PVC membrane Tetracoordinate organonickel complex |
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