Electroanalysis with Carbon Paste–Based Electrodes, Sensors, and Detectors - Electroanalysis with Carbon Paste Electrodes - page 400

TABLE 8.23 (continued)
Analysis of Biologically Important Compounds at Carbon Paste Electrodes. Determination of DNA, RNA, Components
of Nucleic Acids, and Related Compounds. Investigations with DNA-Modiied CPEs
Analyte Modiier Carbon Paste Techniques Comments Ref(s)

Nucleic acids
dsDNA,.ssDNA,.tRNA

G/mo FIA.(1.0.V.vs..SSE) Flow.injection.with.AD,.ox..of.guanine;.LOD.

460-750.pg

[3034]

ssDNA G/mo acc.,.PSA Adsorptive.potentiometric.stripping;.ABS.0.2.M,.

pH.4.8

[629]

dsDNA.plasmid G/mo acc.,.PSA,.DPV,.LSV Adsorptive.stripping.det..via.guanine.moiety,.

denatured.yields.higher.signal;.ABS.0.2.M,.pH.5

[3035]

dsDNA
oligo(dG)21

GC PSA Study.on.ads..and.electroox.;.ABS.0.2.M,.pH.4.or.

PBS,.0.02.M.+.NaCl.0.5.M,.pH.7.4;.LOD.200.μg.
L −1 .(DNA).and.21.μg.L −1 .(odG)

[3036]

dsDNA.(herring.sperm) G/ N -butylpyridinium.

hexaluorophosphate.
CILE

acc..(0.3.V.vs..SCE,.
5.min)

Direct.ox.;.BRP.0.2.M,.pH.4;.LOD.17.μg.mL −1 [491]

ssDNA.(thermally.
denatured)

CILE.G/ N -butyl.
pyridinium.
hexaluorophosphate

acc..(0.35.V.vs..SCE,.
160.s),.CV

Direct.det.;.PBS.0.1.M,.pH.7 [474]

dsDNA
ssDNA
Oligonucleotides

MWCNT/po acc..(0.2.V.vs..SSE);.CV,.

PSA

Enhanced.oxidation.of.guanine.moiety.by.CNT;.
ABS.0.2.M,.pH.5.or.PBS.0.2.M.+.NaCl.0.5.M,.
pH 7.4;.LOD.170.μg.L −1 .dsDNA

[361]

dsDNA
Oligonucleotides

MWCNT/mo CP,.acc..(1.or.5.min,.0.2.V.

vs..SSE)

Stripping.potentiometric.det.;.ABS.0.2.M,.pH.5 [661]

ssDNA.(oligonucleotides)
Dopamine
Ascorbic.acid
Methylene.blue

SWCNT/1-butyl-3-
methylimidazolium.
hexaluorophosphate

CV,.DPV,.EIS Adenine.and.guanine.ox..at.signiicantly.reduced.

potentials;.BRP.0.2.M,.pH.7;.LOD.9.9.pM.(via.ox..
of.gu)

[394]