Instruction Manual

3 General settings for exploratory and determination mode

797 VA Computrace – Software

Time of inert gas purging before the first measurement of the

sample solution.

Conditioning of solid state electrodes

Solid state electrodes (particularly carbon electrodes) can be elec-

trochemically regenerated by a freely selectable number of condi-

tioning cycles. For every cycle, the voltage is changed at a sweep

rate of 1 V/s to the

end potential and then decreased at the same

rate back to the start potential.

Start potential (V) [ -5...+5 V ; -1.2 V ]

Start voltage for the cyclic conditioning sweep.

End potential (V) [ -5...+5 V ; -0.1 V ]

Final voltage for the cyclic conditioning sweep.

No. of cycles [ 0...X ; 0 ]

Number of conditioning cycles.

Note: With the electroplating bath modes different default values

are set (see section 6.3 Conditioning cycles with CVS and CPVS)

Pretreatment

The pretreatment of the electrode before starting a sweep can con-

sist of the following three steps:

• The cleaning potential can be used to clean solid state

electrodes with a stationary surface which are contaminated

with the products of the electrode redox processes.

• The deposition potential is used for electrochemical en-

richment in stripping voltammetry.

• During the

Equilibration time, the start potential of the

sweep is applied to the electrode.