Electroanalysis with Carbon Paste–Based Electrodes, Sensors, and Detectors - Electroanalysis with Carbon Paste Electrodes - page 222

TABLE 8.4
Determination of Copper 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 ) Sample(s) Other Speciication (Remarks) Ref(s)

Cu 2+ ,.Cu + C/PO.(four.diff..

modifs.)

DCV,.ASV accum..by.compl.. in situ

Anodic.reoxidn.

(ca..1.ppb,.3.min) Drinking.water modifs.:.dithiooxamide,.biquinoline,.

Cuproin ,. Bathocuproin
High.selectivity.( c Cu :. c Me .=.1:10 5 )

[2225]

Cu + C/Nj.(1,10-phen.

der.)

CV,.ASV accum..by.compl.

Cathodic.redn.

(3.×.10 −7 .M) Natural.waters modif.:.2,9-dimethyl-1,10-phen.

Requires.pre-redn..step:.Cu II .→Cu I

[1337]

Cu 2+ C/Nj.(alga.

Eisenia )

CV,.FIA bioaccum..by.compl.

MEx;.cathodic.redn.

4.×.10 −9 -1.×.10 −8 .M Model.solns. Dry.alga.dissolved.in.binder

incl..interference.studies

[2226]

Cu 2+ C/PO.(Cu II -

zeolite)

CV,.CSV accum..by.ion-exchange

Cathodic.redn.

(3.×.10 −8 .M) Model.solns. incl..study.with.various.s.es..(KCl,.

KBr,.LiCl,.K 2 PtF 6 )

[829]

Cu 2+ C/Nj.( Dowex

50W )

DPV o.c.-accum..(ion.exchange)

MEx.+.cathodic.redn.

(18.μM) pharms. incl..studies.on.mechanism.of.

preconcentration

[522]

Cu 2+ C/PO.(unm.) FIA Column.pre-separation

Re-elution;.anodic.oxidn.

— CRM.(human.

serum)

CP-det.:.wall-jet.coniguration
s.e.:.1.M.acetate.buffer.+.0.05.M.
NH 3 OH + .(no.interfs..from.Fe III )

[2227]

Cu + C/PO.(benzoin.

oxim)

DPV accum..by.chelating.effect.

and.adsp.;.cathodic.redn.

(ca..1.ng.mL −1 ) Tap,.river,.lake.

waters

s.e.:.0.01.M.HNO 3
No.interfs..from.Ag I ,.Bi III ,.Sb III

[2228]

Cu 2+ C/Nj.(DQDS) DPCSV accum..by.chelating.effect

Cathodic.redn.

3.×.10 −9 -2.×.10 −6 .M Soils,.minerals DQDS:.diquinolyl-8,8′-disulide

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

[1338]

Cu 2+ C/Nj.(SATP) DPCSV o.c.-accum..via.compl.

Cathodic.redn.

2.×.10 −9 -1.×.10 −7 .M CRMs.(pepper.

bush,.hair)

SATP:.salicylideneamino-2-thio-
phenol;.s.e.:.0.01.M.acetate.buffer

[1339]

Cu + C/Nj.(2,2′-BQ.+.

Nf.)

CV,.DPV accum..via.compl.

Cathodic.redn.

(ca..1.nM,.2.min) Model.solns. BQ.+.Nf:.biquinoline.+.Naion ®

CMCPE.regnt..anodically

[1715]