Highly selective and sensitive membrane salicylate electrode based on complex of (1,8-diamino-3,6-dioxaoctane) nickel(II)

Journal of the Brazilian Chemical Society

M. Mazloum-ardakani²  P. Pourhakkak¹  M. Salavati-niasari¹  M. A. Karimi¹  M. H. Mashhadizadeh¹ 

[1] ,Yazd Univesity Faculty of Science Department of ChemitryYazd,Iran

关键词: salicylate ion-selective electrode;    PVC membrane;    potentiometry;    salicylate analysis;    Ni-complex;   

DOI  :  10.1590/S0103-50532011000100004

来源: SciELO

【 摘 要 】

The potentiometric response of salicylate electrode based on complex of (1,8-diamino-3,6-dioxaoctane) nickel(II) was studied. The complex of 1,8-diamino-3,6-dioxaoctane nickel(II) [Ni(DADOO)] was used as carrier into plasticized polyvinyl chloride (PVC) membrane. The influence of several variables was investigated in order to optimize the potentiometric response and selectivity of the electrode. The resulting membrane electrode incorporating 29% PVC, 63% dioctylphthalate (DOP) as plasticizer, 2% methyltrioctylammonium chloride (MTOAC) as cationic additive and 6% carrier (all m/m) demonstrated a Nernstian response of -59.5 ± 1.0 mV decade-1 over the concentration range of 7.0 × 10-7- 1.0 × 10-1 mol L-1 salicylate. The electrode exhibited a fast response time (< 20 s) with detection limit of 5.0 ×10-7 mol L-1, and can be used over a wide pH range of 6.0-9.5. It was successfully applied to the determination of salicylate ion in real samples.

【 授权许可】

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