Chemistry Reference
In-Depth Information
TABLE 8.6
Determination of Zinc, Thallium, Tin, Indium, Bismuth, Antimony, Arsenic, and Selenium at Carbon Paste Electrodes, Sensors,
and Detectors: Survey of Methods and Selected Studies
Type of CPE
(Modiier)
Technique
(Mode)
Measuring Principles
(Method Sequences)
Linearity Range
(LOD;
t
ACC
/
t
R
)
Other Speciication
(Remarks)
Ion, Species
Sample(s)
Ref(s)
Zn
2
+
Zn
2+
C/PO.(BG.+.
Zn(SCN)
4
2−
)
POT.(dir.)
Ion-pairing.with.modif.
Equilibrium.potential
1.×.10
−4
-0.1.M.
(50.μM;.60.s)
Model.solns.
BG:.
Brilliant Green
.(dye)
Slow.nearly.Nerstian.
response
[1974]
Zn
2+
C/TCP.(+MF,.
in situ
)
DPASV
Electrolytic.accum.
Anodic.reoxidn.
2.×.10
−7
-1.×.10
−5
.M.
(2.×.10
−7
.M,.3.min)
Drinking.w.,.
deionized.w.
s.e.:.0.1.M.ammonia.buffer.
(pH.9)
In.presence.of.Cu
II
.(Cu:Zn.
< 5:1)
[257]
Zn
2+
,.Pb
2+
,.
Cu
2+
C/PO.[ZeMS(s)]
DPCSV
accum..via.intercalation.
effect;.subs..redn.
2.×.10
−7
-5.×.10
−6
.M.
(145.nM;.4.min)
Model.solns.
ZeMS(s):.zeolite-based.
molecular.sieves(s);.study.
on.Zn
II
.species.in.AmB;.
extensive.interf..studies
[2382]
Zn
2+
,.Cd
2+
,.
Pb
2+
EH-CPE.(+BiF
,
in situ
)
SWASV
accum..onto.Bi.via.Me
a
Bi
b
.
alloy.formation;.reoxidn.
ca..5.μg.L
−1
.Zn
2+
.(−)
Model.solns.
EH:.electrically.(pre)heated.
CPE;.detn..of.Zn.tested.only.
in.presence.of.Me
2+
.
(in 10 × conc..excess)
[294]
Zn
2+
,.Cd
2+
,.
Pb
2+
C/SO.(Bi
2
O
3
)
DPASV
accum..via.electrolytic.
redn..+.Me
a
Bi
b
.alloy.
form.
Anodic.reoxidn.
50-200.μg.L
−1
.Zn.
(20.μg.L
−1
;.5.min)
Model.solns.
Way.of.plating:.(i).
in situ
,.
(ii) ext.,.(iii).
in-nascenti
.
(via Bi
2
O
3
.redn.);.detn..of.
Zn.with.high.background
[103]
Zn
2+
,.Cd
2+
,.
Pb
2+
C/SO.[HgO,.
Bi
2
O
3
(s)]
DPASV
accum..via.electrolytic.
redn..at.
in-nascenti
.
formed.MF.or.BiF;.
anodic..reoxidn.
50-1000.ppb.Zn.
(25 ppb;.10.min)
Tap.and.natural.
waters
HgO,.Bi
2
O
3
.added.as.5%.
(m/m);.tests.on.
reproducibility.(
R
±
.<.5%);.
compared.with.MF-.and.
BiF-SPE
[623,2283]
(
continued
)
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