13 - 8
IPN 074-397-P1G
HAPSITE Smart Operating Manual
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.
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 (in a waste container,
preferably in a vented hood) after each rinse.
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.
To Next Page
Loading...
Need help?
General
