Abstract: The field of flow injection analysis (FIA) is growing rapidly because much applied research is being conducted around the world. This creates a great need for information dissemination across the globe to keep researchers up to date on current research trends. With the internet becoming the tool for global communication, it seems appropriate that support of the growth in FIA should be via this medium. Thus, the flow anal. database (FAD) was developed as a central resource for bibliog. information on the area of FIA and flow anal. in general.

Abstract: A new apparatus for mixing sample and reagent in flow injection analysis (FIA) is described. The continuously variable volume reactor (CVVR) replaces the conventional mixing coil in a flow injection (FI) manifold to provide mixing and dilution. A linear actuator motor allows control of the chamber volume via LabVIEW software. The chamber volume can be incremented in steps of I µL over the range 68-1704 µL. In addition, the chamber has an integral variable-speed stirring unit that is also under computer control. Experiments were performed to evaluate the dispersion characteristics of this new device, evaluate the volume reproducibility, and understand the mixing characteristics. Use of the chamber is shown in the determination of iron(II) in pond water, and in NIST SRM 1643d with excellent results and a detection limit of 3.7 µg/l iron(II). Advantages of the CVVR and future research activities using the device are discussed.