Waters ZMD Quadrupole Instrument
(Acquired Used in 2006.)The ZMD, with upper mass range 2000 m/z, is a quadrupole mass analyzer based detector that provides molecular weight and structural information for a wide variety of analytes. Samples are introduced into the source of the instrument from an HPLC or other liquid introduction system. Ionization at atmospheric pressure takes place in the ESI or APCI ion source. These ions are filtered according to their mass to charge ratio (m/z). The resultant mass separated ions are then detected via a photomultiplier detection system. The signal is amplified, digitized and presented to the data system.
The ZMD is the primary instrument for LR ESI Open Access. APCI and HPLC/MS can be done, but only after discussion with Furong Sun.