Conductivity detection can be considered a suitable alternative to standard optical detection techniques. Changes in a solution’s conductance in the course of a chemical reaction can be induced either by a change in the concentration of positively or negatively charged ions or molecules or by a change of their mobility inside the solution. Conductivity detection is ideally suited to inorganic reduction/oxidation reaction, proton exchange, metal-ligand binding and micelle formation from surfactants. Conductivity can bring complementary information to absorbance meaning the simultaneous acquisition of two signals is possible.

A low current Potentiostat for a µS precision

The MCS-200 is a potentiostat designed around Fast-Fourier-Transform (FFT) Impedance Spectroscopy . The instrument enables steady state recordings of impedance spectra in the sample (frequency range of 10 Hz to 200 kHz) in order to find the sample’s optimum signal to noise condition, and measure rapid kinetics with a time resolution of 200 µs per data point. Resistance, conductance and specific conductance are measured in real time with a 3ms dead time. The conductimetric cuvette is a customized quartz cuvette with embedded gold electrodes for simultaneous optical measurements.

However, in addition to its kinetics capabilities, the MCS-200 is a powerful potentiostat that brings additional electrochemistry features to the lab, for example cyclic voltammetry techniques to ensure efficient electrode cleaning.

Bkmcs is a special version of Biokine software which includes the control of the impedance spectroscopy module for the measurement of conductivity . It can  measure impedance spectrum and kinetics.

Specifications

• Conductivity range	1 to 500 μS.cm-1
  Accuracy	1%
  Electrical cell constant	6.4 cm
  Light path	2 mm
  Fastest acquisition time	200 μs
  Minimum dead time	3 ms
  Electrode material	gold (Ø 1.6 mm)