Chromium (III) ion selective electrode based on di(benzylamino)glyoxime
محورهای موضوعی : Journal of Physical & Theoretical Chemistry
M. Kia
1
(
Not-mentioned
)
H. Aghaie
2
(
Not-mentioned
)
M. Arvand
3
(
Not-mentioned
)
K. Zare
4
(
Not-mentioned
)
M. Aghaie
5
(
Not-mentioned
)
کلید واژه: Ion-selective electrode, Chromium(III), Di(benzylamino)glyoxime, Poly(vinyl
, 
, chloride) membran,
چکیده مقاله :
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.
