Liquid Chromatography Detectors - The Electrical Conductivity Detector > Page 88
Courtesy of Dionex Inc.
A proprietary ion exchange column, IonPacCS12, was used and the mobile phase consisted of a 20 nM methanesulphonic acid solution in water. A flow rate of 1 ml/min was employed and the sample volume was 25 ml.
|1. Lithium||2. Sodium||3. Ammonium|
|4. Potassium||5. Magnesium||6. Calcium|
Figure 57. Determination of Alkali and Alkaline Earth Cations
The electrical conductivity detector has a sensitivity (minimum detectable concentration) of about 5 x 10-9 g/ml and a linear dynamic range of about 200 where 0.97 < r < 1.03. It is used in probably over 95% of all analyses involving ion exchange procedures to separate inorganic and organic ions.