Analytical Sciences

Preparation of Ferrocyanide-Imprinted Pyridine-Carrying Microspheres by Surface Imprinting Polymerization

Isamu FUJIWARA,* Mizuo MAEDA,** and Makoto TAKAGI***

*Center for Waste Water Treatment, Yamaguchi University, Yoshida, Yamaguchi 753-8511, Japan
**Bioengineering Laboratory, RIKEN (Institute of Physical and Chemical Research), Wako 351-0198, Japan
***Department of Chemical Systems Engineering, Graduate School of Engineering, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan

Ferrocyanide-imprinted pyridine-carrying microspheres were prepared using ferrocyanide ions as a template. This method is based on a surface imprinting technique from the seed emulsion that consisted of 4-vinylpyridine (functional monomer), styrene, and butyl acrylate and a water mixture polymerization by a radical initiator. The ferrocyanideimprinted microspheres had about 200 times higher adsorption affinity over the non-imprinted microspheres in ferrocyanide (template) ion adsorption. This imprinted microspheres also adsorbed other tripolyphosphate, pyrophosphate, and phosphate anions much more strongly than the non-imprinted microspheres did, but were not particularly specific in ferrocyanide ion adsorption.

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