Laboratory Instruments
Agilent / HP 6890 GC
Gas Chromatography (GC) is another important analytical technique used for separating and analyzing compounds that can be vaporized without decomposition.
System Includes:
- Agilent 6890 GC
- FID detector
- 7683 Auto-sampler injector and tray
GC separates components of a sample based on their partitioning between a stationary phase (typically a liquid or solid coating on a column) and a mobile phase (an inert gas like helium or nitrogen).
Column: Typically made of stainless steel and coated with a stationary phase.
Injector: Introduces the sample into the column in its vaporized form.
Oven: Heats the column to control the temperature of the sample components.
Detector: Monitors the eluent leaving the column for analyte detection.
Data system: Collects, analyzes, and presents chromatographic data.
The sample is vaporized and injected into the inlet of the GC.
It passes through the column where separation occurs based on the interaction of the components with the stationary phase.
Different compounds spend varying amounts of time in the column (retention time) based on their volatility, polarity, and interaction with the stationary phase.
The separated components are detected by the detector, which generates a signal proportional to the concentration of each compound.
Pharmaceuticals: Determination of drug purity and identification.
Environmental: Analysis of air and water pollutants.
Forensics: Identification of trace substances in crime scene investigations.
Food and Beverage: Detection of additives, pesticides, and contaminants.
High resolution and separation efficiency.
Ability to analyze complex mixtures.
High sensitivity, capable of detecting trace amounts of compounds.
Gas-Liquid Chromatography (GLC): Uses a liquid stationary phase coated on the column.
Gas-Solid Chromatography (GSC): Uses a solid stationary phase adsorbed onto an inert support.