PMID- 16550424
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20070516
LR  - 20160512
IS  - 1618-2642 (Print)
IS  - 1618-2642 (Linking)
VI  - 384
IP  - 7-8
DP  - 2006 Apr
TI  - Electrochemical properties of silver-copper alloy microelectrodes for use in 
      voltammetric field apparatus.
PG  - 1567-77
AB  - Microelectrodes of silver-copper alloys have been evaluated for use in 
      voltammetric analyses. Increased overpotential towards the hydrogen overvoltage 
      reaction (HER) was found as a function of increased copper content in the silver. 
      A study of oxidizing products by cyclic voltammetry (CV) in NaOH solution showed 
      ten anodic and eight cathodic peaks which are described in the present paper. The 
      behaviour of these alloy electrodes is somewhere between pure silver and pure 
      copper electrodes. Differential pulse anodic stripping voltammetry (DPASV) was 
      used to measure zinc, cadmium and lead in ultrapure water only (18 MOmegacm), and 
      good linearity was found for all metals (r (2)=0.998) in the range of 0.5 to 5 
      ppb with a 600- to 1,200-s plating time. It was additionally found that cadmium 
      and lead were better separated on the alloy electrodes compared to pure silver 
      electrodes. Measurements of nickel were carried out on alloy electrodes by use of 
      adsorptive differential pulse cathodic stripping voltammetry (Ad-DPCSV), and good 
      linearity (r (2)=1.000) was found in the range from 0.5 to 5 ppb with an 
      adsorption time of 120 s. The alloy electrodes were also found to be sensitive to 
      nitrate, and good linearity (r (2)=0.997) was found in the range from 1 mg L(-1) 
      to 100 mg L(-1) using differential pulse voltammetry (DPV) scanning from -450 mV 
      to -1,500 mV. Addition of nitrate in ultrapure water afforded two different peaks 
      related to the successive reductions of nitrate and nitrite. In ammonium buffer 
      solution (pH 8.6) only one peak resulting from reduction of nitrate was observed. 
      Furthermore, the use of alloy electrodes containing 17% Cu was tested in real 
      samples, by installing it in a voltammetric system for monitoring of zinc and 
      lead in a polluted river, the river Deule, near the town of Douai in northern 
      France. Results were found to be in agreement with parallel measurements carried 
      out by ICP-MS.
FAU - Skogvold, Silje M
AU  - Skogvold SM
AD  - Norwegian University of Science and Technology Department of Chemistry, 7491, 
      Trondheim, Norway. silje.skogvold@chem.ntnu.no
FAU - Mikkelsen, Oyvind
AU  - Mikkelsen O
FAU - Billon, Gabriel
AU  - Billon G
FAU - Garnier, Cedric
AU  - Garnier C
FAU - Lesven, Ludovic
AU  - Lesven L
FAU - Barthe, Jean-Francois
AU  - Barthe JF
LA  - eng
PT  - Journal Article
DEP - 20060321
PL  - Germany
TA  - Anal Bioanal Chem
JT  - Analytical and bioanalytical chemistry
JID - 101134327
EDAT- 2006/03/22 09:00
MHDA- 2006/03/22 09:01
CRDT- 2006/03/22 09:00
PHST- 2005/09/30 00:00 [received]
PHST- 2006/01/27 00:00 [accepted]
PHST- 2005/12/25 00:00 [revised]
PHST- 2006/03/22 09:00 [pubmed]
PHST- 2006/03/22 09:01 [medline]
PHST- 2006/03/22 09:00 [entrez]
AID - 10.1007/s00216-006-0334-4 [doi]
PST - ppublish
SO  - Anal Bioanal Chem. 2006 Apr;384(7-8):1567-77. doi: 10.1007/s00216-006-0334-4. 
      Epub 2006 Mar 21.