A method to incorporate 2, 2'-(or 4, 4'-)dipyridyl and tetra-n-butylammonium hydroxide into poly(vinyl alcohol) (PVA) monoliths and the controlled-release properties of these polymer monoliths for delivery of the reagents are reported. The monoliths were prepared by heating PVA beads until they formed a viscous liquid and then loading the molten polymers with the desired reagents. Several freeze-thaw cycles were then carried out to provide the mechanically stable, reagent-loaded monoliths. The release of the reagents from the PVA monoliths was monitored by UV-vis spectroscopy, and the release was found to proceed in a controlled manner, yielding consistent results among different reagent-loaded PVA monoliths. In addition, the reagents underwent no chemical changes upon their release from the monoliths. Limitations of the use of the controlled-released chemicals as replenished reagents in Fujiwara reactions for the continuous monitoring of halocarbons. are discussed. (c) 2007 Wiley Periodicals, Inc.