Chromium (III) ion selective electrode based on di(benzylamino)glyoxime

Subject Areas : Journal of Physical & Theoretical Chemistry

M. Kia ¹ , H. Aghaie ² , M. Arvand ³ , K. Zare ⁴ , M. Aghaie ⁵

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Received: 2015-04-25 Accepted : 2015-04-25 Published : 2006-08-01

Keywords: Ion-selective electrode, Chromium(III), Di(benzylamino)glyoxime, Poly(vinyl&#x0D, &#x0D, chloride) membran,

Abstract :

A new poly(vinylchloride) membrane sensor for Cr3+ ions based on di (benzylamino)glyoxime asan ionophore was prepared. The electrode has a linear dynamic range 1×10-6-1×10-1 mol l-1,with aNernstian slope of 20.3 ± 0.5 mV per decade and a detection limit of 2×10-7. It has a fast responsetime of <15 s and can be used for at least 3 months without any considerable divergence inpotential. The proposed electrode revealed good sensitivity for Cr(III) over a wide variety of metalions and could be used in a pH range of 2-5.5. The proposed sensor was used for the determinationof Cr3+ ions in real samples such as tea leaves, coffee and cacao powder by direct potentiometry.