Chemistry Reference
In-Depth Information
TABLE 8.1
Determination of Gold at Carbon Paste Electrodes, Sensors, and Detectors: Survey of Methods and Selected Studies
Form,
Species
Type of CPE
(Modiier)
Technique
(Mode)
Measuring Principles
(Method Sequences)
Linearity Range
(LOD;
t
ACC
/
t
R
)
Other Speciication
(Remarks)
Sample(s)
Ref(s)
Au
III
,.Ag
I
C/Nj.(unm.)
LSV
Electrolytic.deposition
Anodic.reoxidn.
5.×.10
−9
-3.×.10
−7
.M.
(5.nM; 15.min)
Model.solns.
Simultaneous.detn..of.Au
III
.
and.Ag
I
CPE:.unusual.bell-shaped.
constr.
[12]
Au
III
,.AuX
4
−
C/Nj.(unm.)
LSV
Electrolytic.deposition
Anodic.reoxidn.
25-500.ng.mL
−1
.
(1.ng mL
−1
; 20.min)
Model.solns.
pH-study.included;.
quantiication.via.peak.
shifts;.X.….Cl,.Br
[2188]
Au
III
,.Me
N
C/PO.(unm.)
LSV
Electrolytic.deposition
Anodic.reoxidn.
(μM.level)
Model.solns.
detn..in.presence.of.
Pt-metals;.Me
N
:.Pt
IV
,.Ru
III
,.
Rh
III
,.Pd
II
,.Ir
IV
[2189]
Au
III
,.Au
I
C/Nj.(Ce
4+
,.
in situ
)
LSCP.
(CCSA)
accum..assisted.by.modif.
oxidn..by.constant.current
2.×.10
−6
.-.1.×.10
−5
.M.
(80.nM; 15.min)
Drugs,.human.
serum
Samples.digested.in.min..
acids
Quantif..via.E-t.curves
[190]
Au
III
,.AuCl
4
−
C/Nj.(unm.)
LSV
Electrolytic.deposition.
(0.1.ppm)
Metallic.copper
s.e.:.0.1.M.HCl
[2190]
Anodic.reoxidn.
Au
III
,.AuCl
4
−
C/PO.(unm.)
DCV
Electrolytic.deposition
Anodic.reoxidn.
(0.1.ppb)
Elemental.silicon
s.e.:.0.1.M.HCl.+.0.001.M.
Fe
3+
[2191]
Au
III
,.AuCl
4
−
C/Nj.(unm.)
ASV,.CV
Electrolytic.accum.
Anodic.reoxidn.
0.1-10.μM.(0.1.μM)
Feed,.raws,.
cleaner,.
post-cyanide.
baths
interfs..from.Fe
3+
.suppressed.
by.solvent.extraction;.
no eff..of.Ag
+
[2192]
Au
III
,.AuX
4
−
C/Nj.(four.diff..
ion-exs)
CSV
accum..via.ion-pairing
Cathodic.redn.
100-300.μg.L
−1
Model.solns.
interfs..from.I
−
,.As
III
,.CrO
4
2−
,.
and.Pb
2+
;.Me.….Cl,.Br
[802]
Au
III
,.AuCl
4
−
C/Uv.(dithizone)
AdSV
o.c..accum..via.sorption
Cathodic.redn.
0.1-1.0.mg.mL
−1
.(2.min)
Model.solns.
Dithizone:.reagent.with.
-N
=
,.−OH,.and.−SH.funct..
groups
[799]
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