Patent ID: 6538735
Filing Date: 2003-03-25
Classification: G01N

Abstract:
A photochemical method for measuring light emitted by a liquid subjected to an excitation light said liquid contained in a vessel, said method comprising:(a) producing an excitation light having a first wavelength band, for a pre-determined time period; (b) transmitting said excitation light into said liquid through a fiber bundle; (c) said liquid producing, in a photochemical response to said excitation light, an emitted light having a second wavelength band, said second wavelength band being shorter than and separated from said first wavelength band; (d) passing said emitted light to a detector through a fiber bundle surrounding and coaxial with the fiber bundle of (a); (e) detecting said emitted light for a predetermined period of time after producing of said excitation light ceases; (f) determining the amount of light received by said detector, said amount being indicative of the amount of said emitted light produced by said liquid; and, (g) shielding said detector from said excitation light when said excitation light is being produced.