4
– Example Applications
Thermo Scientific
Product Manual for the ERS 500 Suppressor
Page 56 of 84
031956-11
For Research Use Only. Not for Use in Diagnostic Procedures.
4.7.2
Dionex IonPac CS12A Analysis of 24% Sulfuric Acid
Sample:
100 µL of 24% sulfuric acid neutralized in the Dionex CERS 500
Concentrator Column:
Low Pressure Trace Cation Concentrator
(
i.e. Dionex TCC-XLP1, Item # 063889
)
Guard Column:
Dionex IonPac CG12A Guard Column
Analytical Column:
Dionex IonPac CS12A Analytical Column
Eluent:
20 mM Methanesulfonic acid (MSA)
Eluent Flow Rate:
1.0 mL/min
Electrolytic Suppressor:
Dionex Cation Electrolytically Regenerated Suppressor, Dionex CERS 500
Recycled Eluent Mode
or Chemical Suppressor:
Dionex Cation Chemically Regenerated Suppressor, Dionex CCRS 500
Chemical Regenerant:
100 mN TBAOH
Expected Background Conductivity:
20 mM MSA: <1 µS
Expected System Operating Back Pressure:
Without Guard: 1,400 psi (9.65 MPa)
With Guard: 1,850 psi (12.75 MPa)
Figure 10 Dionex IonPac CS12A Analysis of 24% H
2
SO
4
Sample
Figure 14A
Figure 14B
24% H
2
SO
4
Sample
Spiked 24% H
2
SO
4
Sample
Table 12
Recovery Data for the Dionex IonPac CS12A Analysis of 24% H
2
SO
4
Spiking
Standard
Conc.
(µg/L)
24% H
2
SO
4
*
Unspiked Value
Conc.
(µg/L)
Expected
Spiked Value
Conc.
(µg/L)
24% H
2
SO
4
*
Spiked Value
Conc.
(µg/L)
1.
Lithium
2.0
ND
2.0
1.993 + 0.008
2.
Sodium
8.0
7.4 + 0.4
15.4
14.3 + 0.1
3.
Ammonium
B
B
B
B
4.
Dimethylamine
B
B
B
B
5.
Potassium
20.0
3.3 + 0.5
23.3
22.5 + 0.2
6.
Trimethylamine
B
B
B
B
7.
Magnesium
10.0
2.0 + 0.2
12.0
12.2 + 0.2
8.
Calcium
20.0
10.6 + 0.1
30.6
33 + 1
*
Based on 8 runs
ND = None Detected, B = Blank
