| 摘要 |
<p>A fluorescence detector (100) comprising:
(a) a light source (132) being positioned so that in use, radiation emitted therefrom falls on a one or more fluorescing species (138);
(b) a photodetector (136) being switchably connectable between a charge integrating means (154) and a charge disposal means (V rt ), the photodetector being positionable to detect, in use, fluorescent radiation from the fluorescing species; and
(c) a controller in communication with the light source and the photodetector
characterised in that the controller is operable in a cyclic manner to:
(a) activate the light source to emit radiation and connect the photodetector to the charge disposal means for a first period of time; and
(b) connect the photodetector to the charge integrator circuit for a second period of time after the first period; and
wherein the charge integrator circuit is not reset from one cycle to the next.</p> |
