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Proceedings Paper

A Calibration Technique For Photometers
Author(s): I. B.C. Matheson; J. Lee; E. F. Zalewski
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Paper Abstract

The oxidation of luminol, 3-aminophthalhydrazide, gives rise to light emission in the blue part of the spectrum [1]. The quantum yield of this reaction, i.e. the number of photons emitted per luminol molecule reacted was measured some time ago and the reaction proposed as a chemical light standard [2]. The absolute quantum yield of the reaction has been measured then and since using calibrated photomultipliers and small solid angle geometry [3,4], an integrating sphere arrangement with quantum counter and photo-multiplier [5], and a 4i solid angle arrangement where the sample was surrounded by the chemical actinometer ferrioxalate [6]. The present work concerns a remeasurement of the quantum yield using a silicon, Si, photodiode detector and a geometry for which the light collection efficiency is known absolutely. The luminol reaction has been used in turn to calibrate a portable photometer of similar geometry which in conjunction with a transferable light emitting fluid may be used in the field to calibrate underwater photometers.

Paper Details

Date Published: 27 September 1984
PDF: 4 pages
Proc. SPIE 0489, Ocean Optics VII, (27 September 1984); doi: 10.1117/12.943325
Show Author Affiliations
I. B.C. Matheson, University of Georgia (United States)
J. Lee, University of Georgia (United States)
E. F. Zalewski, National Bureau of Standards (United States)

Published in SPIE Proceedings Vol. 0489:
Ocean Optics VII
Marvin A. Blizard, Editor(s)

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