ETHYLENE ANALYZER

The specifications for most ethylene and propylene products result in the need to perform several gas chromatographic analyses on multiple instruments, in most laboratories today. CIC's E/PA-1 (Ethylene/Propylene Analyzer) employs up to three different detectors, reducing the number of instruments necessary for the required analyses.

The chromatogram in Figure 1 shows a familiar FID analysis for hydrocarbons and the insert shows a 50 ppb acetylene peak.

The chromatogram in Figure 2 was obtained using a PDID (Pulsed Discharge Ionization Detector).  Detection limits at 100 ppb are typical.

The valving, columns and pneumatics for this detector are all contained in a purged housing to ensure detector stability and analytical accuracy on oxygen and nitrogen.

Ethylene samples are injected by a gas sampling valve while head-pressurized propylene samples (see our Propylene Analyzer) are either injected by liquid sampling valve or utilize CIC's flow-through vaporization system followed by gas sample valve injection.

 

Chromatographic Instruments Company
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