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SERDOLIT ® Polymeric Adsorbent Resins
Whereas with ion exchangers (mainly) charged molecules can be adsorbed and/or
separated, neutral adsorbent resins (Polymeric ADsorbents: SERDOLIT®
PAD Resins) can be used for the extraction and in some cases even for
separation of neutral, basic and acidic substances. This adsorption process
often is performed with compounds which are dissolved in water or in a
solution which does not contain too much of an organic solvent that might
prohibit the interaction (van der Waals forces, hydrophobic, hydrogen bridges)
between adsorbent and adsorbate.
We offer two types of SERDOLIT®
PAD Resins: polar and unpolar. The unpolar types (SERDOLIT®
PAD I, II, III) are copolymerisates of polystyrene and DVB, whereas the polar
is a polymerized methacrylic acid ester (SERDOLIT® PAD IV).
Unpolar
resins (PAD I - III) bind organics from water, polar SERDOLIT®
PAD IV even from organic solvents. Unwanted substances (impurities, salts) are
eluted with water, the enriched compound(s) with water mixable organic
solvents. Their eluotropic forces are known from chromatographic experience.
Acidic molecules are best eluted with basic eluents, basic molecules under
acidic conditions.
SERDOLIT ® Polymeric Adsorbent Resins



