PDF catalog - Teknolab AS

ION EXCHANGE SORBENTS
Strong anion exchange sorbents (ISOLUTE SAX and PE-AX) are more suited to the extraction of weakly acidic
compounds, as they retain a permanent positive charge across the pH range. Analytes are eluted from strong
anion exchange sorbents by eliminating the charge on the analyte.
ISOLUTE PE-AX is supplied with an acetate counter ion. This has a weaker affinity with the sorbent’s quaternary
amine functional group compared to the chloride counter ion used in ISOLUTE SAX. ISOLUTE PE-AX may
therefore provide more efficient extraction of some acidic analytes than SAX.
Sorbent Class
Exchange
Application
Chemistry
Ordering
Capacity
Data
Information
(meq/g)
Sheets
Page
Weak anion
exchanger, pK
9.8
Weak anion
exchanger, pK
10.1 & 10.9
0.6 Extraction of strong acids and polyacidic compounds from
aqueous sample matrix. Analyte elution can be performed by
neutralizing charge on the sorbent. Sorbent suppled as the free
base.
0.4 Extraction of strong acids and polyacidic compounds from
aqueous sample matrix. Analyte elution can be performed by
neutralizing charge on the sorbent. Sorbent will complex with
certain metal ions. Supplied as the free base.
TN104 64
TN105 65
Strong anion
exchanger
Strong anion
exchanger
0.6 Extraction of acidic analytes from aqueous sample matrix.
Supplied with chloride counter ion.
0.6 Extraction of acidic analytes from aqueous sample matrix.
Supplied with acetate counter ion for more efficient extraction of
acidic analytes including those with polar/water soluble characteristics.
TN103 66
TN103 67
For more information on ion exchange SPE procedures, see the QuickStart Guide (page 141-155).
For in depth technical information on the use of ISOLUTE ion exchange sorbents, refer to the Chemistry Data Sheets listed in
the table above.
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