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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
Quimica Analitica (1989)
  • Julian Tyson
  • A. G. Fogg
  • X. Wang
Abstract
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 dispersion applied to the design of the operating parameters
of flow rate ratio and volume injected. Good agreement between
the predicted and experimentally determined values were
obtained. The resulting manifold gave a linear calibration from the
detection limit (4.5-8.0 ppb) to 2.00 ppm.
Keywords
  • Flow Injection analysis,
  • manifold design,
  • chloride determination,
  • double-line manifold,
  • noise,
  • sensitivity
Publication Date
1989
Citation Information
Julian Tyson, A. G. Fogg and X. Wang. "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" Quimica Analitica Vol. 8 (1989) p. 179
Available at: http://works.bepress.com/julian_tyson/166/