Thermo Scientific ISQ EC, Руководство по эксплуатации

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6
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Operation
Page 148 ISQ EC and ISQ EM Mass Spectrometer Operating Manual
Table 11: APCI source parameters: Advanced view
6.6.4 Method Editor—Scan Settings,
The basic mode scan table is designed to be minimalistic for easy method
creation. To enter a full scan or selected ion monitoring (SIM) scan, simply
enter the desired mass of interest and the preferred polarity. The scan name
and Source CID values are optional (defaults to 0.0 V). Scan and dwell times
are automatically calculated based upon the inputted acquisition rate. Enter
the minimum peak width value and scans per peak desired, and the
sampling rate will be calculated in Hz. If the minimum peak width value is
unknown, adjust the values until the desired rate is selected. The sampling
rate is applied to each scan line item entered in the scan table. See Figure
82.
Parameter Description
Vaporizer temperature Heat applied the auxiliary gas for desolvation. 0 °C – 550 °C
Ion transfer tube
temperature Heat applied to the transfer tube at the source to aid in desolvation
and transmission. 150 °C – 400 °C
Sheath gas pressure Primary gas flow for liquid nebulization. 0 psig – 80 psig
Aux gas pressure
Auxiliary heated gas that aids in desolvation. 0 psig – 15 psig
(Recommended range: 0 – 10 psig)
Sweep gas pressure
Counter-current gas flow at the sweep cone to improve robustness.
0 psig – 2 psig
Source current positive
ions APCI corona discharge needle current for positive ionization. 0 µA –
50 µA (Recommended range: 0 – 8 µA)
Source current negative
ions APCI corona discharge needle current for negative ionization. 0 µA –
50 µA (Recommended range: 0 – 8 µA)