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Electrodes for Voltammetry and Polarography

Metrohm offers a range of electrodes for voltammetry. They are divided in two types:

  • The traditional mercury working electrode Multi-Mode Electrode (MME, product information) that is mainly used for voltammetric trace analysis,
  • The Rotating Disk Electrodes (RDE, product information) which are solid electrode with carbon or nobel metal tips. The RDE is used in both research and teaching for the investigation of electrode reaction kinetics and for voltammetric analyses.
Name Order No. Specifics Applications

Mercury Electrode

Multi-Mode Electrode (MME)

 6.1246.020

The traditional working electrode. Operation modes:

  • DME (dropping mercury electrode)
  • HMDE (hanging mercury drop electrode)
  • SMDE (static mercury drop electrode)

Outstanding features:

  • Highly reproducible mercury drops
  • Signal with minimum interference· Consumes very little mercury
  • Mercury is completely sealed· Simple to handle
  • Low running costs

VA trace analysis

  • Transition metals
  • Anions· Organics

Rotating Disc Electrode (RDE)
with platinum electrode tip 6.1204.210 + 6.1204.1x0 6.1204.190
Platinum sensor (1 mm diameter, polished) mounted in a glass tip
6.1204.160
Platinum sensor (2 mm diameter, polished) mounted in a PEEK tip
6.1204.170
Platinum sensor (3 mm diameter, polished) mounted in a PEEK tip

Cyclic Voltammetric Stripping (CVS):
Organic additives in electroplating solutions

  • Suppressors
  • Brighteners
  • Levelers
with platinum electrode tip 6.1204.210 + 6.1204.120 Platinum sensor (2 mm diameter, unpolished) mounted in a PEEK tip

Research, universities

  • Electrode kinetics
  • Reaction mechanisms: Investigation of oxidation processes
with the standard gold electrode tip 6.1204.210 + 6.1204.140 Gold sensor (2 mm diameter, unpolished) mounted in a PEEK tip

VA trace analysis

  • Mercury acc. to Application Bulletin 96

Research, universities

  • Investigation of oxidation and also reduction processes
with the lateral gold electrode tip 6.1204.210 + 6.1204.150 Gold sensor (2 mm diameter, unpolished) mounted in a PEEK tip (lateral position)

VA trace analysis

  • Arsenic acc. to Application Bulletin 226
with glassy carbon electrode tip 6.1204.210 + 6.1204.110 Glassy carbon sensor (2 mm diameter) mounted in a PEEK tip

VA trace analysis

  • Transition metals (special applications) with the mercury film technique (MFE)

Research, universities

  • Electrode kinetics
  • Reaction mechanisms
with Ultra trace Graphite electrode tip 6.1204.210 + 6.1204.180 Special graphite sensor (2 mm diameter) mounted in a PEEK tip

VA trace analysis:
Transition metals (special applications)

  • with the mercury film technique (MFE)
  • for mercury free applications
with silver electrode tip 6.1204.210 + 6.1204.130 Silver sensor (2 mm diameter, unpolished) mounted in a PEEK tip

VA trace analysis

  • Determination of halides

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