Electroanalysis with Carbon Paste–Based Electrodes, Sensors, and Detectors - Electroanalysis with Carbon Paste Electrodes - page 264

TABLE 8.9 (continued)
Determination of Metals of the I, II, III, and IV Group and of Rare Earths 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 ) Ion, Species Sample(s) Other Speciication (Remarks) Ref(s)

Rare earth metals
Th 4+ C/PO.( ALC ,.

in situ )

AdSV accum..by.compl./ads.

Cathodic.redn.of.ligand

3.×.10 −9 −8.×.10 −7 .M.
(1-9.×.10 −10 .M;.
3.min)

Clays,.CRMs.
(ore.
specimens)

ALC :.Alizarin.complexon.reagent
interf..studies.(with.10.various.
metals,.incl..Me RE )

[2357,2358]

Sc 3+ C/PO.( ARS ,.

in situ )

2nd.DeLV adsort..accum..as.compl.

Cathodic.redn..of.ligand

1.×.10 −9 −4.×.10 −7 .M.
(6.×.10 −10 .M;.3.min)

Minerals,.
CRMs.(ore.
specimens)

ARS :. Alizarin Red .' S' ;.s.e.:.mixed.
acetate/phthalate.buffer.(pH.4-6)
interf..studies.with.Me RE

[1381,1382]

Er 3+ CILE,.CNTPE,.

CNT-CILE.
(a-c).
(dMNSPsCA)

POT.(dir.) Strong.interaction.effect

Changes.in.equilibrium.
potential.(at.pH.3.5-9)

1.×.10 −7 −0.1.M.(5.×.
10 −8 .M).
[for CNT-CILE]

Model.solns. modif:.5-(dimethylamino).

naphtha-.lene-1-sulfonyl-4-ph-
semicarbazide
opt..comp.:.45%.C.+.20%.CNTs.+.
20%.[BuMIm]BF 4 +.20%.modif.

[415]

Er 3+ CNT-C-ILE.

(HDEBH)

POT.(dir.) Strong.interaction.effect

Changes.in.equilibrium.
potential.(at.pH.3-8)

8.×.10 −8 −0.01.M.(6.×.
10 −8 .M;.15.s)

Tap.and.river.
water

modif.:. N ′-(2-hydroxy-1,2-di-phen-
ethylidene)-benzohydrazide;.(rt)IL:.
[BMIM]BF 4 .+.3%. n -SiO 2 .added

[2359]

Eu 3+ C/PO.[Ze(nat.)] SWCSV accum..via.adsorption.to.

modif.;.cathodic.redn.

1.×.10 −7 −2.×.10 −5 .M.
(4.×.10 −8 .M;.−)

Stream.
sediments

modif.:.natural.zeolite.
(montmorillonite);.high.selectivity.
over.Me RE

[2360]