Gas Chromatography is commonly used to determine the composition of LPG after vaporization of the sample.
This vaporization phase is often a source of errors and bias. Most of the methods are offline and operator-dependent, resulting in problems of reproducibility and repeatability of analyses.
SRA Instruments has developed MyVAP, a vaporizer and sampler, both independent and automatic, which extracts LPG through a heated stainless steel chamber controlled by
electronic pressure and temperature sensors in accordance with the UOP 539 method.
As described in the method, the cylinder has an open/closed valve which allows the LPG to be sprayed in a very reproducible manner, independently of the operator.
The system’s performance is based on very precise control of pressure and temperature during the sample vaporization phase. The spray cycle is easily programmable via the MyVAP web interface. It also includes purging the GC sampling system and valve to reduce sample-to-sample memory effects.
Before injection, the gas is sampled at the set pressure and GC analysis is automatically initiated by an external start.
All operations are fully automated and controlled by the integrated web interface. MyVAP is made from high quality materials and components using safety fittings and a safety valve that ensures safe operation.
The integrated and accessible web browser software, supported by SRA Instruments, extends the capabilities of the MyVap system and includes security settings, remote management and start of the staining process.
Benefits:
- fully automated vaporization
- excellent reproducibility and repeatability
- automatic GC sequence analysis
- ethernet communication with PC Stand-alone system compatible with GC quality.
Applications:
-
analysis of hydrocarbon composition in LPG
- analysis of incondensation in LPG
- analysis of sulphide specifications, with the MyVap system in the inertial version.