Teledyne GC-Pro/FID - Gas Chromatograph - Manual (Page 46)

Operation GC-Pro FID
Teledyne Analytical Instruments 32
4.1 Equipment
The following supporting gases and hardware will be required to
operate the (standard) analyzer:
1. Fuel: A cylinder containing a hydrogen gas, zero gas quality
composition will be required to supply the fuel for the flame
ionization burner. The cylinder is to be equipped with an oil-free
metallic diaphragm regulator (dual stage).
2. Blanket Air: A cylinder of compressed air, zero gas quality will
be required to maintain the proper atmosphere within the cell.
The cylinder is to be equipped with an oil-free, dual stage,
metallic diaphragm regulator.
3. Carrier Gas: A cylinder of nitrogen gas, zero gas quality,
equipped with dual stage metallic diaphragm regulator is
required.
4. Span Gas: A cylinder or a permeation device system, capable of
generating known concentration of benzene and/or other
aromatic hydrocarbons of interest, will be required to standardize
the analyzer.
5. Sample Pressure Regulation: An oil-free, metallic diaphragm
regulator must be installed at the sample point when possible; see
Section 3.3.3 Gas Connections.
CAUTION: THE GASES USED MUST BE OF THE HIGHEST
QUALITY, ULTRA ZERO GRADES, AS SHOWN
BELOW. FAILURE TO DO SO WILL RESULT IN
CONTAMINATION AND FAILURE TO DETECT
AT
THE REQUIRED ACCURACY.
AIR: USE WATER PUMPED AIR WITH THC LESS
THAN 0.1 PPM. DO NOT USE OIL PUMPED AIR
UNDER ANY CIRCUMSTANCES.
FUEL: HYDROGEN GAS, 100%, ZERO QUALITY
WITH THC LESS THAN 0.5 PPM.
CARRIER GAS: NITROGEN GAS, ULTRA ZERO
GRADE WITH THC LESS THAN 0.05 PPM.