DVLS Oily Residues in LPG Analyzer ASTM D7756

The DVLS Oily Residues in LPG Analyzer determines residues in liquefied petroleum gases by gas chromatography according to ASTM D7756 and EN 16423. The analyzer includes the DVLS Liquefied Gas Injector and the Pressure Station developed by Da Vinci. 

Sampling and analysis of liquefied gases

The direct injection approach of the Liquefied Gas Injector includes the proven fuel direct injection technique used by the automotive industry to inject fuel into the automotive engine combustion chamber. The LGI uses a standard GC injector needle, which is inserted into a GC large volume on-column injection system. Solenoid activation transfers the pressurized sample through the needle directly on-column. A sliding device moves the needle downwards for the injection and upwards for purging.

 

To allow a representative sample injection a Pressure Station is used to keep the sample in a liquid phase during the injection. The sample cylinder is installed using quick connectors. For liquid samples the Pressure Station adds high pressure Nitrogen to the sample cylinder and controls the outlet pressure and flow. Optionally the Pressure Station can also be configured for gas samples by including a vaporizer to control the sample evaporation after injection. The waste sample is vented to a central waste system to ensure laboratory safety.. 

 

[LPG Residue Applications]

LPG Residue Applications
[LPG Residue options]

LPG Residue options
[LPG Residue Benefits]

LPG Residue Benefits
[LPG Residue Download]

LPG Residue Download