| 摘要 |
<p>Improvements have been made to the Electrospray and Atmospheric Pressure Chemical Ionization source chambers interfaced to mass spectrometers to simplify source performance optimization and source operation and to improve system sensitivity. The atmospheric pressure ion source procedure for optimizing performance has been simplified by adding windows (46, 47) along the sides of the atmospheric pressure ionization chamber (60) allowing direct viewing of Electrospray and Atmospheric pressure ion sources during operation. A cylindrical lens (64) which extends along the side walls of atmospheric pressure chamber has been configured to be semitransparent for viewing into the chamber. This cylindrical shaped side lens (33) is electrically isolated from the Electrospray liquid introduction needle (32) and Electrospray chamber endplate (34). Improved Electrospray mass spectrometer system sensitivity can be achieved when operating the cylindrical lens with a higher potential difference between it and the Electrospray liquid introduction neddle than is set between the needle and the endplate.</p> |
