Electroanalysis with Carbon Paste–Based Electrodes, Sensors, and Detectors - Electroanalysis with Carbon Paste Electrodes - page 426

TABLE 8.25 (continued)
Analysis of Biologically Important Compounds at Carbon Paste-Based Electrodes: Vitamins

Analyte Modiier Carbon Paste Techniques Comments Ref(s)

Nicotinamide
Pyridoxine
Ribolavin

Macrocycles CV,.DPV,.EIS Accumulation;.LOD.0.03.mg.L −1 ;.

s: pharmaceuticals

[1397]

Nicotinic.acid V red.;.0.15.M.HCl;.LOD.3.3.μM;.for.drug.analysis [3178]

Nicotinic.acid MWCNT.+.TiO 2 .with.

La(III)/po

CV,.A.(0.32.V.vs..
SCE)

Catalytic.ox.,.KCl,.0.1.M,.pH.10;.LOD.0.27.μM;.
s: urine

[1246]

Nicotinic.acid Pseudomonas luor-escens .TN5,.

whole.cells.+. p -benzoquinones.
or.phenazine.methosulfate.+.
dialysis.membrane

A.(0.5.V.vs..SSE) Catalytic.hydroxylation.of.na;.quinine.or.ohenazine.

as.electron.acceptor;.PBS.0.1.M,.pH.7

[786,1442]

Panthenol
Panthothenic.acid

CoO.+.surfactants G/p.(liquid) CV,.LSV,.CP,.DPV Studies.with.surfactants.and.metal.oxides,.catalytic.

red.;.PBS,.pH.6.08;.s:.cosmetics,.pharmaceuticals

[1622]

Phylloquinone.
(vitamin K1)

G/Nj LSV,.oc.acc..

(15.min),.adSV

s:.plasma.after.extraction.(hexane/alc.) [3179]

Pyridoxal Octadecyl.amine.or.1-amino-l2-

(octadecanoylamino).dodecane

G/mo oc..acc..

(triluoroacetate.
buffer),.DPV

Detection.via.Schiff.base;.Na-perchlorate.0.1.M;.
LOD.0.5.μM;.s:.non-fat.dry.milk

[1637,.
1641]

Pyridoxine.(vitamin.
B6)

CV ox.;.interference.of.ascorbic.acid.removed.by.ion.

exchange

[3180]

Pyridoxine Cu(II).hexacyanoferrate(III) G/mo CV,.LSV Catalytic.ox..via.Fe III ;.ABS.with.0.05.M.Na + ,.

pH 5.5;.LOD.0.41.μM;.s:.pharmaceuticals

[1034]

Pyridoxine V(IV)-salen G/mo CV,.LSV Catalytic.ox..via.V(V);.KCl.0.1.M,.pH.7;.LOD.

37.μM;.s:.pharmaceuticals

[1585]

Pyridoxine
Ribolavin
Thiamine

Crown.ethers G/po CV,.DPV,.EIS Complexation.of.vit..B6.by.crown.ether;.TRIS.

buffer 0.05.M,.pH.10.3;.s:.pharmaceuticals;.LOD.
0.2.mg.L −1

[1398]

Ribolavin.(vitamin.B2) G/liquid.parafin DPV NaCl.0.1.M,.pH.2.5;.LOD.20.nM;.s:.tablet [3181]

Ribolavin G(atc..100°C)/ceresin.wax LSV Paste.with.wide.anodic.range;.H 2 SO 4 ,.0.1.M [39]

Ribolavin Immobilized.on.SiO 2 /Nb-oxide.

grafted.with.phosphate

G/mo CV NaNO 3 ,.0.1.M,.pH.7 [1198,.

3182]