Product Manual for Dionex IonPac AS23 Columns - Cromlab
Product Manual for Dionex IonPac AS23 Columns - Cromlab
Product Manual for Dionex IonPac AS23 Columns - Cromlab
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<strong>Product</strong> <strong>Manual</strong> <strong>for</strong> <strong>IonPac</strong> <strong>AS23</strong> amd <strong>IonPac</strong> AG23 <strong>Columns</strong> Page 15 of 325.4 Effect of Temperature on the <strong>AS23</strong> SelectivityThe following chromatograms demonstrate the effect of temperature on the <strong>AS23</strong> selectivity. Monovalent inorganic anions haveslightly shorter retention time and divalent inorganic anions have slightly longer retention time as temperature changes from roomtemperature (21.5 °C) to 35 °C.Sample Loop Volume: 25 µLColumn:<strong>IonPac</strong> <strong>AS23</strong> (4-mm) Analytical Column + <strong>IonPac</strong> AG23 (4-mm) Guard ColumnEluent: 4.5 mM Na 2CO 3/0.8 mM NaHCO 3Temperature:See ChromatogramEluent Flow Rate:1.0 mL/minSRS Suppressor:Anion Self-Regenerating Suppressor, ASRS ULTRA IIAutoSuppression Recycle Modeor AES Suppressor:Atlas Anion Electrolytic Suppressor, AAES,(if eluent suppression required is less than 25 µeq/min)or MMS Suppressor:Anion MicroMembrane Suppressor (AMMS III)MMS Regenerant: 50 mN H 2SO 4Expected Background Conductivity: 20-22 µSAnalytemg/L (ppm)1. Fluoride 3.02. Chlorite 10.03. Bromate 20.04. Chloride 6.05. Nitrite 15.06. Chlorate 25.07. Bromide 25.08. Nitrate 25.09. Phosphate 40.010. Sulfate 30.0835 °C10.01216.0 µSmin4 5 6 71039-2.00.0 10.0 20.0 25.010.01216.0 µSmin4 5 6 7830 °C1039-2.00.0 10.0 20.0 25.0Room Temperature (21.5 °C)10.01216.0 µSmin4 5 6 781039-2.00.0 10.0 20.0 25.0Figure 2Effect of Temperature in <strong>AS23</strong> SelectivityDocument No. 065120-05 ©2012 Thermo Fisher Scientific July 2012
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