Shimadzu GCMS-QP2010 Series, Руководство по обслуживанию, Страница: 140 / 168

ZEAV-0416A
b. Mass spectra
measurement
s (MS, MC)
c. Selected ion
measurement
(SIM)
* Take and keep mass spectrometer (MS) and
mass chromatogram (MC) sensitivity
measurement data from practical operation.
Measurement conditions shown below. (This
checks the operation of the MS and MC
software.)
* Keep SIM data from practical operation. (This
checks the operation of the SIM software.)
Normal operation
Normal operation
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4
Performance
checks
（
EI
）
a. Resolution
b. Sensitivity
（
EI
）
c. Mass marker
* After auto-tuning, change the RF offset value to
sharpen the peaks. Check m/z69, 219, 502
peak amplitudes do not exceed 0.5M.
(At least 2M resolution at FWHM 0.5 max.)
* Conduct MC measurement at m/z272 on OFN
1pg/
µ
L (1ppb) standard sample. Confirm
S/N
≥
60 (RMS).
* Auto-tuning results give PFTBA peaks (m/z69,
131, 219, 264, 414, 502, 614) within
C
0.1
mass.
2M resolution min.
As described at left
As described at left
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Performance
checks
（
PCI
）
a.Autotuing
b. Sensitivity
Autotuning should be completed without
problems (detector gain <1.5kV)
Intensity ratio; I(29)/I(17) > 0.2 for
methane
I(57)/I(43) > 1 for iso-butane
PFTBA spectrum should be obtained
Conduct MC measurement at m/z183 on
Benzophenone 100pg/
µ
L (100ppb) standard
sample. Confirm S/N
≥
150 (RMS).
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Performance
checks
（
NCI
）
a.Autotuing
b. Sensitivity
Autotuning should be completed without
problems
(detector gain <1.6kV for NCI, <2.2kV
for SEI, <1.5kV for SCI)
NCI : The m/z 633 peak for PFTBA should
be a base peak
The following peaks of PFTBA should be
observed for NCI :
m/z 264, 333, 414, 452,514,595,633
Conduct MC measurement at m/z272 on OFN
100fg/
µ
L (100ppt) standard sample. Confirm
S/N
≥
100 (RMS).
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Performance
checks
（
DI
）
Tem cont
Carry out temperature adjustment
on the set-up temperature
conditions.
RommTemp-40 ℃ /min-300 ℃
Sample Cholestane 100ng/ul(100ppm) 1ul
M/Z217 BeasePeak,M/Z372molequrePeak
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5
Accessories
Check correct standard accessories are supplied
(according to list in the System User Guide) Correct accessories □