Latex Agglomerated Ion Exchangers

Several advantages have been cited for latex coated anion exchangers [15]  

Over the years, Dionex has developed a wide variety of latex agglomerated resins to meet various needs in IC. A review of these developments is given in a book by Weiss [16]. Properties of latex columns are summarized in Table 3.6. 

Extensive research effort has gone into the development of resins and columns for IC. This is perhaps best illustrated by a specific example a stationary phase for the determination of fluoride and oxyhalides such as chlorite, chlorate and bromate [20]. 

The use of a functionalized latex with extremely low cross-linking creates a potential problem with regard to the exchange capacity of the coated resin. The surface area of standard microporous particles is inadequate to provide sufficient capacity when used with these low-cross-linked latexes. A resin with an acceptable capacity was finally produced by coating a super-porous polymeric substrate. 

The structural and physical properties of the final product (with the commercial designation ion Pac AS 12A) are given in Table 3.5. 

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