IC

The major anions in water samples are routinely measured with the Metrohm 883 Basic IC plus. Fluoride, chloride, bromide, nitrite, nitrate, phosphate and sulfate are separated with a mobile phase (3.2 mmol/L Na2CO3 and 1.0 mmol/L NaHCO3) across a Metroselp A Supp 5 anion exchange column. The detection is based on a conductivity measurement. The system uses an ion suppressor for the reduction of the baseline and an increase in the sensitivity.

Spektrum einer Ionenchromatographie mit Signalhöher (y-Achse) aufgetragen gegenüber der Rententionszeit (x-Achse). Auf einen kleinen Fluoridpeak folgt ein hoher Chloridpeak, dann ein kleiner Systempeak, dann ein mittelhoher Nitratpeak und zuletzt ein Sulfatpeak.

Conductivity measuring system:

Microprocessor-controlled digital signal processing (DSP technology).
Detector with 6 sample chromatograms.
Measuring range 0...15000 μS/cm, without range switching
Noise < 0.1 nS at 1 μS/cm
Deviations from 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 < 0.2 nS/cm

Technical data:

Metal-free IC system
Operating pressure range:

0...50 MPa (500 bar) High pressure pump
0...35 MPa (350 bar) Standard PEEK system

Components:

iPump, iDetector, iColumn, MagIC Net

Reproducibility of the eluent flow < 0.1 % deviation

Updated by: Christian Hansen

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IC

Metrohm 883 Basic IC Plus