TY - JOUR
T1 - Development of the continuously variable volume reactor for flow injection analysis
T2 - Part 1. Design, capabilities and testing
AU - Lipe, Linda L.
AU - Purinton, Suzanne M.
AU - Mederios, Elizabeth
AU - Harrell, C. Chad
AU - Efta, Cynthia
AU - Murray, Melissa
AU - Wood, Meredith
AU - Portier, Ray Bernard
AU - Chalk, Stuart J.
N1 - Funding Information:
Thanks to Bob Reifsneider for help with the design and engineering of the CVVR. Thanks to the Department of Chemistry and Physics and the Office of Undergraduate Academic Enrichment at UNF for financial support of Elizabeth, Chad, and Cynthia. Thanks to Global FIA ( www.globalfia.com ) for donation of the Valco valve (and actuator) and general flow injection analysis supplies. This work was also supported by the Flow Analysis Database ( www.fia.unf.edu ).
PY - 2002/3/25
Y1 - 2002/3/25
N2 - 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 1 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.
AB - 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 1 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.
KW - Automation
KW - Flow injection analysis
KW - Iron(II) determination
KW - Mixing chamber
KW - Remote analysis
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U2 - 10.1016/S0003-2670(01)01624-5
DO - 10.1016/S0003-2670(01)01624-5
M3 - Article
AN - SCOPUS:0037170689
SN - 0003-2670
VL - 455
SP - 287
EP - 304
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 2
ER -