Gas Chromatography System

How Gas Chromatographs Work & How We Save You Time & Money

Below are some advantages of Excedr’s gas chromatography instrument leasing program:

  • Leasing eliminates the upfront cost of buying equipment and instead allows for more manageable payments over time
  • Payments may be 100% tax deductible*, which can lead to significant cash-savings
  • Outright purchases of equipment are more expensive than leasing through us
  • We offer comprehensive repair coverage, keeping your lab’s downtime to a minimum
  • All the administrative work associated with instrument procurement and maintenance is completed by us
  • Saving money with our program allows labs to reinvest in their core business and operations (staffing, inventory, marketing/sales, etc.)

*Please consult your tax advisor to determine the full tax implications of leasing equipment.

Regardless of GC system configuration, Excedr’s equipment lease program is able to source all instrument types and can accommodate any model preferences you might have. Request an estimate today and see how we can discount your gas chromatography device’s price.

All equipment brands/models are available


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A gas chromatograph, or GC, is a specific type of device used in chromatography, allowing users to isolate and analyze compounds. This can be performed on any compound that can be successfully vaporized. By using this machine you can get an analysis without causing decomposition of a sample. The typical uses for gas chromatographs include separating the different compounds in mixtures and testing the purity of substances.

In the gas chromatography process, there are two general phases, the mobile phase and the stationary phase. Mobile regards a carrier gas, often an unreactive or inert gas. Helium is the standard choice for most devices. Stationary refers to a microscopic layer of polymer or liquid that is set on an inert support inside tubing which is generally made of glass or metal. The gases that are analyzed react with the walls of the stationary-phase coated column. This causes each individual compound to elute at different times. Elution refers to the extracting of a material from another. This elution is referred to as the retention time of the compound, and comparing these times provides helpful data that makes the GC analytically useful.


Methods, Benefits, & Aerograph Machine Cost

While there are many names for this type of technique, including vapor-phase chromatography (VPC) and gas-liquid partition chromatography (GLPC), they all refer to the same separation of gases. Many methods exist to customize the analytical uses of gas chromatography, and are as follows:

Carrier Gas
Standard carrier gases include helium, hydrogen, argon, and air, but the gas that is chosen is generally determined by the specific detector being used. Other times, the carrier gas is chosen to match the sample as the chosen gas will not show up on the readout, which can be helpful on occasion.

Inlet Type
The inlet is dependent upon whether the sample is in a liquid, gaseous, solid, or adsorbed form and whether the sample has to be vaporized. Already dissolved samples can be added directly onto the column, while gaseous samples are often injected using a gas valve system. Adsorbed samples that need to be vaporized have their own injection methods.

Column Selection
Column choice is similarly dependent on the sample, with the polarity of the mixture being paramount. The polarity of the column stationary phase needs to match closely with the sample to increase resolution and decrease run time.

Column Temperature
The column in a GC is located inside an electronically controlled oven, so when speaking about the column temperature it refers to the heat of the oven which governs the column’s temp. The most important factor in determining temperature is finding the right compromise between how long the analysis will go and how much separation needs to occur. This is important because the higher the temperature the faster the sample will move through the column, but the faster it moves, the less it interacts with the stationary compound.

Stationary Compound
Polarity is once again paramount when choosing the stationary compound, as it should have similar polarity to the solute. Common choices include, but are not limited to, cyanopropylphenyl dimethyl polysiloxane, biscyanopropyl cyanopropylphenyl polysiloxane, carbowax polyethyleneglycol, and diphenyl dimethyl polysiloxane.

GC Instruments
These instruments are extremely useful but can seem somewhat confusing mechanically when inspecting them from the outside. Understanding the component part of the machines can help make troubleshooting issues simpler. There are three main components:

  • Detectors: There are many possible detectors that can be used in a GC, but the two most common are the thermal conductivity detector (TCD) and the flame ionization detector (FID). These are commonly chosen as the TCD is universally applicable and FIDs are very sensitive toward hydrocarbons.
  • Inlets: The choice of inlet allows the user to introduce a continuous flow of carrier gas to the sample. There are many different options, with many being more effective depending on the type of carrier gas that is going to be used.
  • Autosamplers: This component provides the inverse of what the inlet offers, offering a means of introducing the sample automatically into the inlets. There are several different types of autosamplers that can be interchanged based on the needs of your lab.

Whatever type, make, or brand you need, we can lease it to you. Your laboratory deserves the best devices for the research that needs to get done. Don’t waste your time and money buying outright! Enroll in our rental program today.

We Offer Gas Separator System Leases to Fit Every Need

Operating Lease

This off-balance sheet financing structure provides three options at the end of the term. The lessee has the option to return the equipment to the lessor, renew at a discounted rate, or purchase the instrument for the fair market value. Monthly payments are also 100% tax deductible which yields additional monetary savings.

Sale Leaseback

If you recently bought equipment, Excedr can offer you cash for your device and convert your purchase into a long-term rental. This is called a sale leaseback. If you’ve paid for equipment within the last ninety days, we can help you recoup your investment and allow you to make low monthly payments. This also frees up money in your budget rather than tying it down to a fixed asset.

  • Agilent: Intuvo 9000 GC System, 7890B GC System, 490 Micro GC System, 490-PRO Micro GC System, 490-Mobile Micro GC System, 490 Micro GC Biogas Analyzer
  • Bruker
  • Thermo Fisher: TRACE 1300 Gas Chromatograph, TRACE 1300 Mainframe, TRACE 1300 Mainframe MS, TRACE 1310 Gas Chromatograph, TRACE 1310 Mainframe, TRACE 1310 Mainframe MS, TRACE 1310 DFS/IRMS Mainframe
  • Teledyne
  • Shimadzu: Nexis GC-2030 Gas Chromatograph,GC 2014 Gas Chromatograph, GC-8A Gas Chromatograph, System GC, Multi-Dimensional Gas Chromatograph, Comprehensive GC-MS (GCxGC-MS) System
  • Gow-Mac: PPB Level Analysis Series 5900, Team Programmable Series 826, Isothermal Series 580, Academic Series 400, Argon Gas Series AR710/720, Dual Detector Series 8100, Process Series 200
  • LECO: GCxGC-EDC/FID, L-PAL3, Pegasus BT, Pegasus GC-HRT+, GCxGC-HRT+, Pegasus BT4D, Pegasus BT 4D-GCxGC, Pegasus GC-HRT+ 4D, Pegasus 4D-C
  • OI Analytical
    BTEX Analysis System, FBA 5320VPH Analysis System, VOC Analysis Systems, S-PRO 3200 GC System
    GC Detector:
    5390 Tandem PID/XSD, 4450 Tandem PID/FID, 5350 Tandem PID/ELCD, 4430 Photoionization Detector, 5360 XSD, 5383 Pulsed Flame Photometric Detector
  • PerkinElmer: Clarus 590 GC, CLARUS 690 GC,Clarus SQ 8 GC/MS, Clarus SQ 8S GC/MS, Clarus SQ 8T GC/MS, Torion T-9 Portable GC/MS, Arson Analysis by Automated Thermal Desorption-GC/MS,Phthalates Determination by GC/MS, Bioethanol Alcohol Determination by GC, Biodiesel FAME Determination by GC, Model Arnel 4035 Light Hydrocarbons by FID, Model Arnel 4032 Fixed Gases for TCD, Model Arnel 4050 Detailed Hydrocarbon Analyzer, Model Arnel 1115 Refinery Gas Analyzer,Model Arnel 4025 Trace Sulfur by SCD Analyzer, Model Arnel 1117 High-Speed Refinery Gas Analyzer, QSight 210 MD Screening System,Biodiesel Methanol Determination by Headspace-GC, Biodiesel Glycerin Analysis System 230V
  • Quadrex
    Modulare Alliance Series for GC
    Pre-Configured GC Systems: 8610c GC Mainframe, 310GC Chassis, SRI Preconfigured GC Systems, SRI-8610-5400-1, SRI-8610-5675-1, SRI-8610-5405-1, SRI-8610-3070-1, SRI-8610-1117-1, SRI-8610-0270-1, SRI-8610-0114-1, SRI-8610-0080-1, SRI-8610-0072-1, SRI-8610-0065-1, SRI-8610-0040-1, SRI-8610-0035-1, SRI-0310-1000-1, SRI-0310-0004-1, SRI-8610-0059-1, SRI-8610-0050-1, SRI-8610-0065-1, SRI-8610-5400-2, SRI-8610-5675-2, SRI-8610-5405-2, SRI-8610-3070-2, SRI-8610-1117-2, SRI-8610-0114-2, SRI-8610-0080-2, SRI-8610-0072-2, SRI-8610-0071-2, SRI-8610-0065-2, SRI-8610-0059-2, SRI-8610-0040-2, SRI-8610-0035-2, SRI-0310-1000-2, SRI-0310-0004-2, SRI-8610-0050-2, SRI-8610-0270-2, SRI-8610-0059-2
  • Waters: Xevo TQ-GC Mass Spectrometry System, Water Atmospheric Pressure Gas Chromatography
  • and more!


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Effect on Credit & Operating Capital

Leasing/renting does not hinder your future borrowing ability and allows you to keep your business credit line open for expansions, staffing, and other operational expenses. Additionally, it strengthens the cash flow of your business and keeps cash reserves free for business development opportunities.

Used Equipment

Unlike traditional financing and leasing companies, the Excedr program can accommodate refurbished/reconditioned equipment in addition to demo units. If you are looking for additional cost-savings, we recommend considering this option.

Speed of Approval

Excedr’s program allows you to respond quickly as your need for equipment and technology arises. You can be approved with minimal documentation and have the equipment you need in operation and generating revenue for your business quickly.


Whether you’re looking to lease an ion chromatography instrument or leaseback a GC system, we can help. Call us at +1(510) 982-6552 or complete the contact form to the right to discuss the specifications for the equipment you would like to lease.