| 摘要 |
A transport detector for Liquid Chromatography includes a spinning disk covered in a non-wettable, non-transparent material with a wettable transparent channel left for a mobile phase. A mobile phase is delivered from a chromatography column into the channel. A light source with focusing optics is set along the channel path and array of sensors for optical signal detection are mounted along the path of the light. The disk rotation could be set at different speeds by a motor, allowing the operator to control the thickness of the liquid layer in the channel. Varying the thickness of liquid changes the length of the optical cell of the detector, which allows adjusting the sensitivity of the detector. The spinning disk design allows for using of multiple sensors of different kind as well as different detection methods. Also, the array of sensors of the same kind could be used to perform multiple measures of the same portion of the mobile phase. This feature improves the Signal to Noise ratio of the detector. The detector has a wiping and vacuuming device at the end of the channel's circular path to regenerate the channel for the new mobile phase entry. |
