DVLS Liquefied Gas Injector

Applications

The DVLS Liquefied Gas Injector offers laboratories a safe, reliable and efficient standard for the following applications:

Oily Residue Analysis in LPG

The Liquefied Gas Injector is standardized in ASTM D7756 and EN 16423 for the determination of oily residues and contaminants in liquefied petroleum gas (LPG). The method quantifies residues in the C10 to C60 range and reports results in mg/kg.

Specifications:

• Analysis time: < 20 minutes
• Analysis range: 10 - 600 mg/kg
• LOD oily residue: 0.5 mg/kg

Hydrocarbon Composition and Oily Residues in LPG

By adding the Da Vinci LS Secondary Oven and a liquid sample valve configuration, hydrocarbon composition according to ASTM D2163 and ISO 7941 can be combined with oily residue analysis from the same sample cylinder.

Specifications:

• Analysis time: < 20 minutes
• Analysis range C1-C5: 0.01 - 100% v/v
• Analysis range residue: 10 - 600 mg/kg
• LOD residue: 0.5 mg/kg
• LOD C1-C5: 0.001% (10 mg/kg)

Composition and Impurities in Butadiene, Crude C4 and Raffinate

Dual-channel configuration for simultaneous determination of composition and impurities according to ASTM D2593, ASTM D4424, ASTM D2426 and dedicated industry methods.

Applications include:

• Hydrocarbon impurities at ppm level
• Composition analysis of Butylene, Crude C4, 1,3-Butadiene, Crude Butadiene or Raffinate
• Dimer and styrene determination
• TBC and EC3071 inhibitors

Residual solvents including NMP, DMF, toluene and acetonitrile

Specifications:

• Analysis time: 30 minutes
• LOD C1-C5 hydrocarbons: < 0.5 mg/kg
• LOD impurities: < 0.2 mg/kg

Oxygenate Traces in Liquid Hydrocarbon Matrices

The configuration including a Deans switching bracket and inert Programmable Temperature Inlet supports ASTM D7423 and ASTM D7754 for oxygenate trace analysis in gasoline and liquid hydrocarbon matrices. The addition of the Liquefied Gas Injector enables trace analysis in liquefied gases.

Specifications:

• Analysis time: < 25 minutes
• Analysis range: 100 mg/kg to 50 μg/kg
• LOD individual oxygenates: < 10 μg/kg

Elemental Sulfur in Liquefied Gases

Direct injection ensures transfer of elemental sulfur onto the column for accurate analysis in LPG samples.

Specifications:

• Analysis time: < 20 minutes
• Analysis range: 0.1 - 20 mg/kg S
• LOD individual sulfur components: 0.01 mg/kg S

Alkanolamines in LPG

Determination of amines and oily residue in a single analysis using selective nitrogen  detection.

Specifications:

• Analysis time: < 20 minutes
• Analysis range: 0.1 - 300 mg/kg
• LOD amines: 0.001 mg/kg

N₂, CO₂, H₂S and Hydrocarbons in Gas Condensate

A dual channel configuration allows a single-run analysis of permanent gases and hydrocarbons in high-pressure stabilized and unstabilized gas condensate.

Specifications:

• Analysis time: 25 minutes
• Analysis range permanent gases and H₂S: 0.01% - 100% (m/m)
• Analysis range C1-C36+: 0.001% - 100% (m/m)
• LOD permanent gases and H₂S: 0.002 mg/kg
• LOD C1-C36+: 1 mg/kg

Benzene and Toluene in LPG

Based on ASTM D7756 Appendix X3, enabling simultaneous determination of benzene, toluene and oily residue in LPG.

Specifications:

• Analysis time: 20 minutes
• Analysis range: 1 - 600 mg/kg
• LOD: < 0.1 mg/kg

Click here for all LGI application notes.

Benefits

• Safe injection of liquefied gases without evaporating large sample volumes
• Direct liquid injection minimizes discrimination and fractionation effects
• High repeatability through direct sample transfer onto the column
• Standardized in ASTM D7756 and EN 16423
• Suitable for a wide range of liquefied gas applications
• Analysis of oily residues, contaminants and impurities from a single platform
• Proven technology in leading oil refineries globally since 2010
• Detection limits below 0.1 mg/kg for various applications
• Reduction of safety risks associated with manual evaporation techniques

Configuration

The configuration of the LGI analysis consists of:

• Agilent gas chromatograph
• Da Vinci LS Liquefied Gas Injector (LGI)
• Da Vinci LS Pressure Station
• Da Vinci LS LGI Controller
• Agilent OpenLab Software

Optional configurations can include:

• Da Vinci LS Secondary Oven
• Specific detector configurations depending on the application 

Downloads

• Da Vinci LS Liquefied Gas Injector Brochure
• Da Vinci LS Pressure Station Flyer
• Da Vinci LS Secondary Oven Flyer
• DVLS Butadiene Analyzer Flyer
• DVLS Brochure Solutions for the Gas and Petrochemical Industries

Frequently Asked Questions

What is the DVLS Liquefied Gas Injector?

The DVLS Liquefied Gas Injector is a direct liquid injection system developed for the gas chromatographic analysis of contaminants, impurities and residues in liquefied gases.

Is the LGI technique a standardized method?

The Liquefied Gas Injector is standardized in ASTM D7756 and EN 16423 for the analysis of oily residue in LPG.

What are the main advantages of direct liquid injection?

Direct liquid injection eliminates the need for sample evaporation, improves safety and reduces discrimination, adsorption and fractionation effects.

What is the application range of the Liquefied Gas Injector?

Other than the standardized methods for the analysis of oily residue in LPG, the application range of the LGI includes:

• Elemental sulfur in LPG;
• Amines in LPG;
• Nitrogen, carbon dioxide, hydrogen sulfide and hydrocarbons in (un)stabilized gas condensate; 
• Composition & impurities analysis in butadiene, crude C4 & raffinate (ASTM D2593, D4424, D2426);
• Oxygenate traces in liquid hydrocarbon matrices (ASTM D7423, D7754);
• Benzene and Toluene in LPG (ASTM D7756);

Click here for all LGI application notes.

Is the Liquefied Gas Injector (LGI) proven in industry applications?

Yes. Since its introduction in 2010, the LGI has been successfully used by a global installed base of leading oil refineries.

How long does a typical analysis take?

Depending on the application, analysis times range from approximately 20 to 30 minutes.

Is the system suitable for high-pressure liquefied gas samples?

Yes. The Pressure Station maintains the sample under controlled pressure and allows safe and repeatable introduction of liquefied gas samples into the GC system.

Can the LGI be used for trace-level analysis?

Yes. The Liquefied Gas Injector (LGI) enables trace analysis of oily residue, hydrocarbons, oxygenates elemental sulfur, amines, Benzene and Toluene.