For analytical applications, the response time of an ion selective
electrode is a significant issue. The response time of an electrode
indicates the time required by an ion selective electrode to achieve
a steady-state potential (within 71 mV), when it is dipped in
successive analyte ion solution each having the tenfold divergence
in concentration. The dynamic response time of CGE-1 for step
changes in the concentration of Fe (III) ions has been given in Fig.
S4 (Supporting information). It is evident from Fig. S4 that the
time taken for the electrode to achieve 95% of the stable potential
is less than 10 s (approx.) and response time remains constant up
to 5 min. The lifetime of projected CGE-1 was at least 3 months.
During this time, the response characteristics of CGE-1 such as
concentration range (1.0 101
–1.0 107 M), detection limit
(4.68 108 M) and Nernstian slope (18.8 mV/decade) remained
almost constant. After this time period, the electrochemical
behavior of CGE-1 gradually deteriorates, that may be due to
leaching of ionophore (RD) from membrane of CGE-1.
The
For analytical applications, the response time of an ion selectiveelectrode is a significant issue. The response time of an electrodeindicates the time required by an ion selective electrode to achievea steady-state potential (within 71 mV), when it is dipped insuccessive analyte ion solution each having the tenfold divergencein concentration. The dynamic response time of CGE-1 for stepchanges in the concentration of Fe (III) ions has been given in Fig.S4 (Supporting information). It is evident from Fig. S4 that thetime taken for the electrode to achieve 95% of the stable potentialis less than 10 s (approx.) and response time remains constant upto 5 min. The lifetime of projected CGE-1 was at least 3 months.During this time, the response characteristics of CGE-1 such asconcentration range (1.0 101–1.0 107 M), detection limit(4.68 108 M) and Nernstian slope (18.8 mV/decade) remainedalmost constant. After this time period, the electrochemicalbehavior of CGE-1 gradually deteriorates, that may be due toleaching of ionophore (RD) from membrane of CGE-1.The
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