INFICON Explorer Portable Gas Chromatograph - Manual (Page 336)

Explorer Operator Manual
334
Calibration Gas
It is recommended that commercially analyzed calibration gas and
associated regulators be used with
Explorer.
The compounds and the concentration of the calibration gas will depend on your
application. When ordering calibration gas, specify each compound and
concentration. Specify 5% blend tolerance, and 2% analytical tolerance.
Standards must be made up in hydrocarbon free air. Balance air should not have
more than 0.1 ppm total hydrocarbons (THC). If your standards are unstable in air or
if you are using nitrogen as carrier gas you may obtain your calibration standards
made up in nitrogen. Balance nitrogen should not have more than 0.1 ppm total
hydrocarbons (THC).
When selecting calibration gas, keep in mind the upper and lower limits of the assay.
Try to obtain each compound at a concentration that is close to the your value of
interest.
Obtain a calibration gas regulator, with 1/4” compression fitting outlet. Use only the
specified regulator for your calibration gas. Confirm regulator type and material
with your specialty gas supplier.