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Single boundary measurements in flow analysis

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posted on 26.10.2018, 09:58 by Alan E. Davies
Single boundary measurements using a stream-switching valve in a single-channel manifold, where a large volume injection produces two discrete reaction zones at the extremities of the sample bolus, have been studied. When monitoring with both diode-array and double beam spectrophotometers, refractive index (RI) effects could be compensated for satisfactorily by subtracting measurements made at a second wavelength. This was less effective with a single beam spectrophotometer. For larger volume flow-cells the indicated flow direction should be followed to obtain undistorted signals, but with an 8 μl flow-cell the direction of flow was immaterial. RI correction was possible with all three flow-cells studied, but the use of the 8 μl cell reduced the contribution of the flow-cell to the overall dispersion. [Continues.]

Funding

Agricultural and Food Research Council.

History

School

  • Science

Department

  • Chemistry

Publisher

© Alan Edward Davies

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

1994

Notes

A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.

Language

en

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