Zinc(II)‎ selective polyvinyl chloride)‎ membrane ISE using a macrocyclic compound l,12,14-triaza-5,8-dioxo-3(4)‎,9(10)‎-dibenzoylcyclopentadeca-l,12,14-triene as neutral carrier

Abstract EN

The potentiometric response characteristics of zinc ion selective PVC-based membrane electrode employing l, 12, 14-triaza-5, 8-dioxo-3(4), 9 (10)-dibenzoyl-l, 12, 14-triene as an inophore was investigated.

The proposed electrode exhibits a Nernstian behavior with a slope of 29.2 ± 0.4 mV per decade with a working concentration range of 1.3 x 10 7—1.0 x 10"1 mol L-1 and a detection limit of l.0 x 10-8 mol L-1.

The membrane having the composition as TDODBCPT : 0-NPOE : PVC : OA; 7 : 57 : 30 : 6 wt.% exhibits the best results.

It has a fast response time of 7 s and can be used for at least 100 days without any considerable divergence in potential.

The proposed electrode show good discrimination of Zn2+ ion from diverse ions.

The potential response remains constant over a pH range of 3.5-9.2.

The electrode found well work under laboratory conditions.

The proposed sensor directly used for determination of zinc ions in human hair sample, wastewater and an indicator electrode with EDTA titration.