Using optical fibre sensing for measuring chlorophyll-related pigments in turbid water

Yeremias Bunganaen

Research output: ThesisDoctoral Thesis

27 Downloads (Pure)

Abstract

This thesis describes an optical fibre-based technique, known as fibre-evanescent-field absorption (FEFA), and its investigation as a potential method for measuring colour in water samples containing suspended material without the need for sample filtering. A simple FEFA apparatus, assembled using off-the-shelf components was constructed and its performance in measuring absorption of chlorophyll-related pigments in the presence of suspended clay particles compared to bulk-absorption measurements typically conducted in water quality laboratories. The FEFA technique was found to be capable of measuring the wavelenth-dependent absoprtion of milligrams per litre (mg/L) of dissolved chlorophyll-related pigments in the presence of up to 2.5 g/L of suspended clay particles. These concentrations of suspended clay particles were found to preclude the use of bulk absorption measurements due to complete beam attenuation via scattering.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Charles Sturt University
Supervisors/Advisors
  • Lamb, David, Co-Supervisor, External person
  • Woolsey, Gerry, Co-Supervisor, External person
Award date31 Jul 2002
Place of PublicationAustralia
Publisher
Publication statusPublished - 2002

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