Gas Chromatography & GC/MS

Gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS) are essential analytical techniques used across various scientific disciplines for separating, identifying, and quantifying volatile and semi-volatile compounds in complex mixtures. These techniques are powerful tools for researchers in fields such as environmental monitoring, food safety, pharmaceuticals, petrochemicals, and forensics. GC works by injecting a sample into a heated inlet, where it vaporizes and is carried by an inert carrier gas (typically helium or nitrogen) through a column. The column contains a stationary phase, a thin liquid film coated on a solid support. As the sample travels through the column, the different components interact with the stationary phase to varying degrees based on their chemical properties. This... + More

Gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS) are essential analytical techniques used across various scientific disciplines for separating, identifying, and quantifying volatile and semi-volatile compounds in complex mixtures. These techniques are powerful tools for researchers in fields such as environmental monitoring, food safety, pharmaceuticals, petrochemicals, and forensics. GC works by injecting a sample into a heated inlet, where it vaporizes and is carried by an inert carrier gas (typically helium or nitrogen) through a column. The column contains a stationary phase, a thin liquid film coated on a solid support. As the sample travels through the column, the different components interact with the stationary phase to varying degrees based on their chemical properties. This differential interaction separates the components as they elute from the column at different times. A detector at the column's end measures the quantity of each component, generating a chromatogram that displays the separation. GC/MS takes this analysis a step further by coupling the gas chromatograph with a mass spectrometer. After the components are separated by GC, they enter the mass spectrometer. Here, they are ionized and fragmented into characteristic ions. The mass spectrometer measures the mass-to-charge ratio of these ions, providing detailed information about the molecular structure and identity of each component. This combination of separation and identification makes GC/MS a highly sensitive and selective analytical tool. Common workflows supported by GC and GC/MS include qualitative analysis for identifying unknown compounds, quantitative analysis for determining the concentration of known compounds, and targeted analysis for specific compounds of interest. Sample preparation techniques like extraction, derivatization, and concentration are often employed to optimize analysis. Leading manufacturers of GC and GC/MS systems include Agilent Technologies (e.g., Agilent 7890, Agilent 5977), Thermo Fisher Scientific (e.g., Trace 1300, TSQ 9000), and Shimadzu (e.g., Nexis GC-2030, GCMS-TQ8050). These systems offer a wide range of features and capabilities to suit various applications. At ALT, we offer a wide selection of refurbished GC and GC/MS systems from these top brands. Our experienced engineers meticulously refurbish and test each instrument to ensure it meets original equipment manufacturer (OEM) specifications. We back every system with a 90-day warranty, upgradable to three years, and provide lifetime support. This commitment to quality and service provides significant cost savings compared to purchasing new equipment, allowing researchers to maximize their budgets without compromising performance. We understand that uninterrupted lab operations are crucial, so we also offer a price match guarantee and various service options, including white-glove delivery and installation, to ensure a seamless experience. Whether you are setting up a new lab or expanding your existing capabilities, our inventory of refurbished GC and GC/MS systems offers a cost-effective solution for your analytical needs. - Less