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The Design Of Flow Injection Manifolds To Give The Best Detection Limits For Methods Involving On-Line Chemical Derivatisation Part 2. The Spectrophotometric Determination Of Chloride, Julian Tyson, A. G. Fogg, X. Wang

Chemistry Department Faculty Publication Series

The optimisation of a flow injection manifold for the spectrophotometric determination of chloride is described. Factors contributing to the baseline noise due to refractive index and reagent absorption effects are removed by a combination of design features. Firstly, a double-line manifold is used; secondly, pulse-dampers and a packed bed reactor are incorporated into the flow lines and thirdly a delay coil is introduced to resolve the valve switching peaks from the determinand peaks. The appropriate conditions for obtaining the maximum sensitivity are found from an off-line experiment and the guidelines established on the basis of the well-stirred tank model for …