IonPacAS9-SC
034656-06
Page 19 of 28
5.4
Varying the Eluent System - 22 mM Borate
The borate eluent gives the same elution order as the carbonate eluent traditionally used on the IonPac AS9. However, since
the borate anion is a “weaker” eluent ion, higher concentrations are required to achieve the same elution time. The advantage
of the borate eluent is increased resolution of early eluting ions.
Sample Loop Volume:
50 µL
Analytical Column:
IonPac AS9-SC Analytical Column
Eluent:
22 mM H
3
BO
3
/22 mM Na
2
B
4
O
7
Eluent Flow Rate:
2.0 mL/min
SRS Suppressor:
Anion Self-Regenerating Suppressor, ASRS-ULTRA
AutoSuppression Recycle Mode
or MMS Suppressor:
Anion MicroMembrane Suppressor, AMMS III
MMS Regenerant:
25-50 mN H
2
SO
4
Expected Background Conductivity:
5-6 µS
Long-term Storage Solution (> 1 week):
100 mM Sodium Bicarbonate
Short-term Storage Solution (< 1 week):
Eluent
Figure 4
Anion Separation Using 22 mM Borate Eluent
Analyte
mg/L
1.
Fluoride
0.5
2.
Iodate
0.1
3.
Acetate
0.1
4.
Formate
0.1
5.
Chlorite
1.0
6.
Bromate
1.0
7.
Chloride
1.0
8.
Carbonate
-
9.
Nitrite
0.7
10. Bromide
2.5
11. Chlorate
2.0
12. Nitrate
2.0
13. Phosphate
2.5
14. Sulfate
3.0
0
5
10
15
-1
0
1
2
1, 2, 3
4
5
6
7
8
9
10
11
12
13
14
Содержание 043185
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