Unrestricted.2016-11-142011-02-182016-11-141998-05http://hdl.handle.net/2346/8915Several novel flow through optical absorbance detectors have been developed which combine small size, low power requirements, simplicity of manufacture, low cost, and unique capabilities. The employment of optical fibers to connect the light emitting and detecting elements to the flow through cell enable separation of the cell and the detector electronics, allowing cell placement in hazardous or inaccessible locations without jeopardizing operator safety. Two spectrometer designs are also presented which include the above advantages and allow visible wavelength spectra to be obtained for fluids passing through the cell without flow interruption. This is achieved without the use of any moving parts.application/pdfengLight emitting diodesSpectrum analysisFlow injection analysisCapillary liquid chromatographyOptical detectorsDissertation