IonPac NS1 Manual
Document No. 034024-06
Page 18 of 35
4.1.4 Separation of Aromatic Sulfonic Acids Using Ion-Pairing with Suppressed Conductivity
The separation of aromatic sulfonic acids is easily obtained by ion-pairing. The eluent system is identical to that used for the
separation of aliphatic sulfonic acids.
Column:
IonPac NS1 (10 µm)
Eluent:
2 mM Tetrabutylammonium hydroxide,
24% to 48% Acetonitrile in 10 min
Flow Rate:
1.0 mL/min
Injection Loop:
50 µL
Detection:
Suppressed conductivity, ASRS ULTRA II
AutoSuppression MPIC Mode
Regenerant:
10 mN Sulfuric acid
Peaks
mg/L
(as the acid forms)
1.
Benzenesulfonic acid
10.0
2.
Toluenesulfonic acid
8.0
3.
o-, m-, p-Xylenesulfonic acids
9.0
where 1 mg/L= 1 ppm
Figure 4
Separation of Aromatic Sulfonic Acids Using
Ion-Pairing with Suppressed Conductivity
