Design and construction of electrochemical selective sensors for copper(II) in water samples based on C18H18N6S2 and C4H8O4S2 Dithio ligands as neutral carriers

Qasim, Amin K.; Jamil, Lazgin A.; Chen, Qiao

International Journal of Advanced and Applied Sciences

Int. j. adv. appl. sci.

EISSN: 2313-3724

Print ISSN: 2313-626X

Volume 3, Issue 12 (December 2016), Pages: 86-95

Title: Design and construction of electrochemical selective sensors for copper(II) in water samples based on C18H18N6S2 and C4H8O4S2 Dithio ligands as neutral carriers

Author(s): Amin K. Qasim ^1,*, Lazgin A. Jamil ¹, Qiao Chen ²

Affiliation(s):

¹Faculty of Science, Department of Chemistry, University of Zakho, Duhok, Kurdistan Region, Iraq
²School of Life Sciences, Department of Chemistry, University of Sussex, Brighton, BN1 9QJ, United Kingdom

https://doi.org/10.21833/ijaas.2016.12.012

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Abstract:

Dithio based chelating ionophores such as 1-anilino-6-(3, 4-xylyl)-2, 5-dithiobiurea (A) and Dithiodiglycolic acid (B) were used as active components of PVC membrane electrode and explored as Cu2+-ion selective electrodes. The membranes having the composition (A): o-nitrophenyl octyl ether (o-NPOE): polyvinyl chloride (PVC): potassium tetrakis(4-chlorophenyl) borate (KTpCIPB) in the ratio of 3: 78: 40: 2 (w/w; mg) and (B): (o-NPOE): (PVC): (KTpCIPB) in the ration 3 :80 :40 :3 are found to be exhibiting the best sensor characteristics. The fabricated sensors exhibited Nernstain response (29.301 and 28.223 mV decade-1) over concentration ranges of 1.0 × 10-8 to 1.0 ×10-1 mol/L and 1.0 × 10-7 to 1.0 ×10-1 mol/L and exhibit detection limit of 2.2 × 10-8 and 8.3 × 10-7 mol /L for sensor No. 9 and 6 for ionophores A and B, respectively. The best performances were observed with the sensor having the composition of (A): (o-NPOE): (PVC): (KTpCIPB) in the ratio of 3: 78: 40: 2 (w/w; mg), and the electrodes have a response time of 9 - 12 s with a pH range of 3.0 - 7.0, and could be used over a period of 3 months without any significant deviation in its potentiometric characteristics. The analytical usefulness of the proposed sensor has been evaluated by its application in the determination of copper in water samples, the results obtained by the proposed ISEs are in good agreement with the results obtained by direct flame AAS method. The sensor No. 9 has been used also in the potentiometric titration of Cu2+ with EDTA.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords: Dithio ligands, Copper (II) selective electrode, Sensor, PVC membrane

Article History: Received 18 July 2016, Received in revised form 25 November 2016, Accepted 10 December 2016

Digital Object Identifier: https://doi.org/10.21833/ijaas.2016.12.012

Citation:

Qasim AK, Jamil LA, and Chen Q (2016). Design and construction of electrochemical selective sensors for copper(II) in water samples based on C18H18N6S2 and C4H8O4S2 Dithio ligands as neutral carriers. International Journal of Advanced and Applied Sciences, 3(12): 86-95

http://www.science-gate.com/IJAAS/V3I12/Qasim.html

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