Electroanalysis with Carbon Paste–Based Electrodes, Sensors, and Detectors - Electroanalysis with Carbon Paste Electrodes - page 255

Cr III C/PO.(Cr III -

Salophen )

POT.(dir.+.
titr.)

Complexation.with.
modif.
Equilibrium.potential

7.5.×.10 −6 −0.01.M.(2.×.
10 −6 .M;.8.s)

River.water,.drug.
( Salophen )

modif.:. N , N ′-bis(salicylidene)-
o -phenediaminate-Cr(III);.
pH.4.5-7.7;.titr.:.EDTA;.
comp..with.PVC-ISEs

[2320]

Cr VI .(HCrO 4 - ) C/Nj.(TOA) CV,.ASV Complexation.with.

modif.
el..redn..+.anodic.
reoxidn.

nM.level.(3.×.10 −9 .M;.
10.min)

Electronic.
material.and.
components

TOA:.trioctylamine;.the.
selectivity.Cr III .vs..Cr VI .
(600:1);. E ac .=.+0.45.V

[1367]

Cr III C/PO.(NaBPh 4 .+.

AMTX)

POT.(dir..+.
titr.)

Complexation.with.
modif.
Equilibrium.potential

3.×.10 −7 −0.1.M.(2.×.
10 −7 .M;.<10.s)

Model.solns. modif.:.1-[(2-hydroxy-ethyl)

amino]-4-methyl- 9H -
thioxanthen-9-one;.evaln..of.
k i POT .by.various.methods

[2321]

Mo IV-VI
Mo VI .(MoO 4 2− ) C/Nj.(DEDC,.

in situ )

ASV accum..via.redox.compl.

Anodic.reoxidn.

5-50.ng.mL −1 NaWO 4 .(s) DEDC:.diethyldithio.

carbamide
s.e.:.acetate.buffer.(pH.4.8)
No.interfs..from.W VI .(up.to.
1:10 5 )

[2322]

Mo VI .(MoO 2 2+ ) C/Nj.( α BO.+.

ClO 3 − )

DPV accum..by.compl.

Catalytic.redn..of.ClO 3 −

2.×.10 −6 −8.×.10 −5 .M.
(1 ×.10 −7 .M;.60.s)

Model.solns. BO:.benzoinoxime;.s.e.:.

acetate.buffer;.interfs..
from Sn IV

[1374]

Mo VI .(MoO 4 2− ) C/PO.(chitin) ASV accum..by.redox..compl.

reoxidn..(Mo IV .→.Mo VI )

2.×.10 −7 −5.×.10 −6 .M.
(1 ×.10 −7 .M;.20.min)

Sea.water s.e.:.0.1.M.acetate.buffer.

(pH 4.3)
No.interfs..from.common.ions

[1707]

Mo VI .(MoO 3 /
Ox / 2− ).Ti IV ,.V V

C/Uv.(CTAB,.
in situ )

DPASV Ion-pairing.accum..+.

redn..(Mo VI .→.Mo V .+.
Mo IV );.oxidn.

0.5-500.μg.L −1 .(0.4.μg.
L −1 ;.10.min)

Model.solns. CTAB:.

cetyltrimethylammonium.
bromide;.s.e.:.0.01.M.
H 2 C 2 O 4; .simult..detn..of.
Mo VI ,.V V ,.and.Ti IV

[705,817]

( continued )