10.5.3 Procedure. Verify that the GC/MS system meets the instrument performance criteria in Section 10.4.
The GC must be operated using temperature and flow rate parameters equivalent to those in Section 10.2.2.
Calibrate the preconcentration-GC/MS system by drawing the standard into the system. Use one of the standards
preparation techniques described under Section 9.2 or equivalent.
A minimum of five concentration levels are needed to determine the instrument sensitivity and linearity. One of
the calibration levels should be near the detection level for the compounds of interest. The calibration range
should be chosen so that linear results are obtained as defined in Sections 10.5.1 and 10.5.5.
Quantitation ions for the target compounds are shown in Table 2. The primary ion should be used unless
interferences are present, in which case a secondary ion is used.