A new flow cell design for chemiluminiscence analysis

• Published in: Talanta (Oxford) Vol. 55; no. 2; pp. 403 - 413
• Main Authors: Campı́ns-Falcó, P, Tortajada-Genaro, L.A, Bosch-Reig, F
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 30.08.2001; Oxford Elsevier
• Subjects: Analytical chemistry; Cell design; Chemical and thermal methods; Chemiluminescence; Chemistry; Chromium determination; Exact sciences and technology; Luminol-hydrogen peroxide reaction; Chromium determination; Chemiluminescence; Luminol-hydrogen peroxide reaction; Cell design; Water; Accuracy; Sensitivity; Chromium III; Hydrogen peroxide; Detection limit; System design; Comparative study; Figure of merit; Flow injection
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/S0039-9140(01)00445-3

The present study proposes a new flow cell called a bundle cell for chemiluminescence analysis. The results obtained were compared with those achieved by manual and automated batch procedures and flow manifolds with different cells: an common quartz flow cell, a helix cell and the most used spiral cell. Figures of merit such as limit of detection, sensitivity, accuracy and precision for the Cr(III) determination were established with light emission produced by catalysed Cr(III) luminol oxidation by hydrogen peroxide in a basic aqueous solution. An improvement in sensitivity about 50% as compared with the spiral cell and even larger with respect to the other flow cells tested was observed. The limit of detection provided was lower than those obtained with the other flow cells. In reference to the batch mode, similar results were obtained with the bundle flow cell. Good results were obtained for several real water samples containing chromium at different concentrations.