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QUI-1122
Page 34
Markes International Ltd
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+44 (0)1443 230935
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www.markes.com
5.3
System checkout
With “Split On in Standby” selected of at least 20ml/min, ensure air/water background of MS is
within operational limits.
Confirm the calibration of any mass flow controllers is correct using a flow meter.
If applicable, to checkout tube desorption mode, create a new TD- 2-3 stage desorb method using
the parameters set out in documentation supplied with check standard QQR-0190.
Using suitable GC(MS) parameters for the analysis of benzene, toluene, xylene, camphene and di-
octyl phthalate run the check standard.
Assess the results, comparing against the example chromatogram.
If the customer GC conditions prevent analysis of this standard (e.g. the wrong GC column is
installed), or to check out on-line sampling mode, a customer standard should be run as an
alternative
Right click on the Instrument status and select ‘System Info’. Create a copy of the calibration
settings and record.
Once all checks are complete, replace all covers.