5 research outputs found
Fabrication of a Cu(II)-Selective Electrode in the Polyvinyl Chloride Matrix Utilizing Mechanochemically Synthesized Rhodamine 6g as an Ionophore
A CuÂ(II)-selective electrode has
been fabricated by utilizing a
mechanochemically synthesized copper-specific ionophore “L”
embedded in a polyÂ(vinyl chloride) membrane. 2-Nitrophenyloctylether
and sodium tetraphenylborate have been used as a plasticizer and as
a solvent mediator, respectively, and found to be enhancing the sensitivity
of the fabricated ion-selective electrode (ISE). A range of membranes
(S1–S7) with varying compositions were casted and investigated
in ISE. Results revealed an excellent Nernstian response of 29.38
± 0.55 mV/dec for the ISE S6. The fabricated ISE operates well
in the pH window 4.0–7.5, and the limit of detection was found
to be 5 ÎĽM (0.3 ppm). Quick response time (15 s), long shelf-life,
and selectivity (on the order of 10–4 and 10–5) over a number of interfering cations enabled S6
promising for real off laboratory sample analysis and can be employed
to detect copper ion in various industrial as well as biological and
environmental samples. To demonstrate the practical application of
these ISE, the Cu concentration in the digested printed circuit board
has been estimated using the standard calibration plot. The fabricated
ISE has been regenerated through extracting copper by chelating with
ethylenediaminetetraacetic acid