INFICON HAPSITE ER Chemical Identification System - Manual (Page 424)

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HAPSITE ER Operating Manual
5 Adjust the amount of sample in the sample syringe to 20 mL while removing the
air bubble. See
Figure 13-5 .
WARNING
Do not insert a vial, which is completely full of liquid
sample, into a Headspace sample well. An adequate
airspace above the sample is required to allow for sample
expansion during heating. Failure to leave an airspace in
the vial may result in failure of the vial and personal
injury. Do not fill the vial with more then 20 mL of liquid.
Figure 13-5 Clearing the Air Bubble from the Sample Syringe
6 Add Internal Standard and surrogates into the sample.
NOTE: The Internal Standards are a set of compounds which are injected at a
consistent known concentration with each calibration standard,
continuing calibration check, blank, quality control sample, as well as
with each sample. The Internal Standards are used to correct for
method inconsistencies. Internal Standards are chosen so that
interference with compounds from the sample is not encountered.
NOTE: Surrogates are used to indicate consistency within the analysis as
compared to internal standards. These compounds are also injected
into the sample at a consistent known concentration similar to the
Internal Standard. Surrogates are also chosen to avoid interference
with compounds in the sample. Surrogates are reported as recovery
values in percent (%) compared to expected response value.