Electroanalysis with Carbon Paste–Based Electrodes, Sensors, and Detectors - Electroanalysis with Carbon Paste Electrodes - page 182

1 min

2

3

3 μA

4

1

5

6

(A)

3 μA

(B)

2

4

3

1 5

6

50 μS

(C)

FIGURE 8.10 Chromatograms. obtained. using. Cu 2+ -Amberlite. IR-120 * . modiied. electrode.. (A),. unmodi-
ied (bare). carbon. paste. electrode. (B),. and. a. classical. conductimetric. detector. (C).. Note :. Amberle. IR-120.
is. commercially. available. cation-exchange. resin.. Experimental conditions :. Injection. of. 25.μL. of. a. solution.
containing.in.a.mixture.of.(1).1.0.mM.Li + ,.(2).1.0.mM.Na + ,.(3).2.0.mM.NH 4 + ,.(4).1.0.mM.K + ,.(5).2.0.mM.Mg 2+ ,.
and.(6).2.0.mM.Ca 2+ ..Mobile.phase:.3.×.10 −3 .M.methyl.sulfonic.acid..Flow.rate:.0.75.mL.·.min −1 ..Applied.poten-
tial:.−0.4.V.vs..ref..[ Note :.only.for.indirect.amperometric.detection.(A).and.(B)]..(Adapted.and.redrawn.from.
Mariaulle,.P..et.al.,. Electrochim. Acta ,.46,.3543,.2001.)

4

3

2

1

25 μA

NO 2 -

+0.4 +0.6 +0.8

E [V] vs. ref.

+1.0

FIGURE 8.11 Cyclic. voltammetry. of. nitrite. anion. at. a. carbon. paste. electrode. modiied. with. an. anion.
exchanger..Model.calibration..1,.2,.3,.4:.number.of.cycles.. Experimental conditions :.Nujol.oil-based.carbon.
paste. containing. Amberlite ;. CV,. potential. scan. from. E INIT . =. +0.4.V. vs.. SCE. to. +1.05. and. back,. scan. rate:.
50.mV.·.s −1 ;.s.e.:.0.1.M.HCl..(For.other.details,.see.Kalcher,.K.,. Talanta ,.33,.489,.1986.)