Technical data

Overview 1
Dual Agilent Jet Stream Electrospray Ionization (Dual AJS ESI)
Agilent 6200 Series TOF and 6500 Series Q-TOF LC/MS System Concepts Guide 21
Dual Agilent Jet Stream Electrospray Ionization (Dual AJS
ESI)
With the Dual AJS ESI source, the nebulizing gas for the
reference spray can be switched for high flow or low flow
applications. The second sprayer improves the reference mass
stability over a wide range of LC conditions. Low flow
applications are typically less than 200 µL/minute. If the flow is
approximately 200 µL/minute, either low or high flow may be
appropriate.
Both the Dual AJS ESI and the Dual ESI source support two
nebulizers for different applications: the standard nebulizer
(G1958-60098) and the capillary (or microflow) LC/MS
nebulizer (G1946-60260). The main differences are:
• The machined tip of the capillary LC/MS nebulizer has a
smaller exit orifice and internal taper.
• The internal diameter (ID) of the internal needle for the
capillary LC/MS nebulizer is 50 µM versus 120 µM for the
“standard” nebulizer needle.
The recommended flow range (1 to 50 µL/minute) really is
capillary flow, whereas flows from 50 to 250 µL/minute are
typically described as microflow.
Figure 3 Dual AJS ESI source plumbed for high flow application
You connect the tubing here for low flow
applications.