INFICON HAPSITE Smart Plus Chemical Identification System User Manual
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HAPSITE Smart Plus Operating Manual
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.
6a
Rinse the 10
L syringe, with cemented needle (pictured in
Figure 13-6
), to be
used for the injection of the Internal Standard/Surrogate mixture, with high
purity methanol three times, discarding the methanol according to local
regulations (preferably in a vented hood) after each rinse.
WARNING
The needle tip is sharp, be careful to avoid injury.
6b
Rinse the 10
L syringe once with the Internal Standard/Surrogate mixture, and
discard the internal standard/surrogate mix from the 10
L syringe.
6c
Inject the desired amount of Internal Standard/Surrogate mixture into the
sample through the small end of the sample syringe. See
Figure 13-6
.
Figure 13-6 Injecting the Mix into the Sample Syringe
For calibration standard preparation, injection of the proper amount of a calibration
mixture is performed to achieve the desired compound concentrations. Rinse a
separate 10
L syringe with methanol three times. (Discard the methanol from
each rinse according to local regulations.) Then, rinse once with the calibration
mixture (discard this as well). Inject the desired amount of the calibration mixture
through the small end of the sample syringe to complete the calibration standard.