Metrohm 850 Professional IC Anion MSM-HC - Manual (Page 118)

7.13 Conductivity measuring system
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850 Professional IC Anion – MSM-HC
7.13 Conductivity measuring system
Type ￭ Microprocessor-controlled Digital Signal Processing (DSP technol-
ogy)
￭ Intelligent detector with 6 reference chromatograms
Measuring range 0…15000 µS/cm without range switching
Noise < 0.1 nS at 1 µS/cm
Deviations from
the linearity ￭ < 0.1 % for conductivity values greater than 16 µS/cm (typical for
analyses with MSM)
Drift < 0.2 nS/cm per hour
Measuring rate 10 measurements per second for optimum results without filtering
Resolution 0.0047 nS/cm
Baseline Noise < 0.3 nS/cm typical for chemical suppression
Conductivity
detector
Cell volume 0.8 µL
Cell constant ￭ Individual calibration data saved in the detector
￭ adjustable range: 13.0…21.0 /cm
Electrodes Ring-shaped electrodes made from stainless steel
Materials in
contact with
eluent Chemically inert PCTFE
Maximum oper-
ating pressure 5.0 MPa (50 bar)
Cell tempera-
ture 20…50 °C in increments of 5 °C
Temperature
stability < 0.001 °C
Temperature
compensation 0…5 %/K adjustable, default 2.3 %/K
Heating up time < 30 minutes (40 °C)