Gas Chromatography System:

Gas Chromatography System

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

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

The Advantages of Excedr’s Gas Chromatography Instrument Leasing Program:

  • Eliminates the upfront cost of purchasing equipment by spreading its cost over time
  • Minimizes equipment downtime with included complete repair coverage and preventive maintenance
  • Takes advantage of potentially 100% tax deductible* payments, providing you significant cash-savings
  • Expedites the administrative work needed for instrument procurement and logistics
  • Conserves working capital,  enabling you to reinvest in your core business and operations (staffing, inventory, marketing/sales, etc.)
  • Accommodates all manufacturer and model preferences

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

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:

While the basic procedure is still commonly used in many laboratories, it has evolved far beyond simple amplification and detection. Many variations of the original polymerase chain reaction method have been developed over the years and are as follows:

Carrier Gas
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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
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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
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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
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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
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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, bis cyanopropyl cyanopropylphenyl polysiloxane, carbowax polyethylene glycol, and diphenyl dimethyl polysiloxane.

 

GC Instruments
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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.
 

If you’re interested in combining the analytical powers of mass spectrometry with gas chromatography, we can help. Call us at (510) 982-6552 or complete our contact form and we can discuss your leasing options in detail.

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.


GC System Manufacturers & Models on the Market
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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

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

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, 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:
Modular Alliance Series for GC, 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!

 


Operating Capital Benefits

Operating Capital Benefits

Excedr's operating lease structure 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.

Effects on Credit

Effects on Credit

Leasing / renting provides you with non-dilutive financing and does not hinder your future borrowing ability. You're able to acquire the equipment you need without the baggage associated with traditional financing.

Used Equipment

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

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.