Application of metalloporphyrin grafted-graphene oxide for the construction of a novel salicylate-selective electrode

作者：Poursaberi Tahereh; Hassanisadi Mostafa^*

来源：Journal of Porphyrins and Phthalocyanines, 2012, 16(10): 1140-1147.

DOI：10.1142/S1088424612501143

• graphene oxide
• salycilate
• selective electrode
• metalloporphyrin
• potentiometry

Due to the vast applications of salicylate ion, development of a simple and selective procedure for its determination is of practical interest. Herein, the unique properties of graphene oxide are combined with the anion selectivity of metalloporphyrins to construct a novel salicylate selective electrode. This electrode is prepared by incorporating Cu(II)-5-4 (aminophenyl)-10,15,20-triphenyl porphyrin grafted-grapheneoxide (CuTPP-GO) into the plasticized poly (vinyl chloride) membrane. Effects of plasticizer nature, CuTPP-GO concentration and anionic and cationic additives on the potential response of the electrode are investigated. The electrode with the membrane composition of 25% PVC, 50% NPOE, 5% NaTPB and 20% CuTPP-GO provided the best behavior. This sensor shows a Nernstian response (57.8 mV. decade(-1)) in the concentration range of 5.0 x 10(-1)-5.0 x 10(-7) M with detection limit of 8.0 x 10(-8) M. sensor response is stable in the pH range of 5-7 and shows a discriminating ability for salicylate compared to most common anions. The sensor was successfully used for determination of salicylate in an aspirin tablet.

• 出版日期2012-10