Waters Micromass ZQ 2000, Operator'S Manual, Page: 113 / 133

Using the ESCi Multi-Mode Ionization Source 113
A
3. Optimize the fast-transitioning values, ES Voltages , APCI Voltages , and Source
Voltages , for each mode and polarity ( Figure A-7 ).
4. Optimize the slow-transitioning values, Temperatures and Gas Flow , for both ESI
and APCI performance ( Figure A-7 ).
Note: The ESCi+ and ESCi– pages should display identical s low-transitioning
values.
5. Select APcI or ESI for each row in the Ion Mode column by clicking the drop-down
list in each row ( Figure A-7 ).
Note: You cannot select polarity from the Ion Mode column. Instead, click Ion Mode
in the menu bar, and select mode and polarity from the drop-down list. This
introduces the ESI+, ESI–, APCI+, or APCI– Source page, which determines an
acquisition’s polarity.
Figure A-7 Selecting the Ion Mode in the MassLynx Peak Editor
Figure A-8 shows the Tune window as it appears while the instrument operates in ESCi
mode.
Note: In the peak display, the APCI peaks appear in blue, the ESI peaks in red
( Figure A-11 ).
Peak
Fast-
Display
Transitioning
Variables
Slow-
Transitioning
Variables
Ion Mode
List