Flexible gas chromatograph is a highly integrated and modular gas chromatography analysis equipment. Its core principle is to use the distribution difference of sample components between the carrier gas and the fixed phase to achieve separation, and then convert it into an electrical signal for analysis through the detector.
After vaporization in the vaporization chamber, the sample is carried into the chromatographic column by a carrier gas (such as nitrogen or helium). The chromatographic column is filled with a stationary phase (liquid or solid), and the sample components are repeatedly distributed between the carrier gas and the stationary phase due to differences in boiling point, polarity, or adsorption. The components with high allocation coefficients flow out first and enter the detector in sequence.
Flexible gas chromatography achieves flexible configuration of functions through modular design. Users can choose different injection ports (such as split/non split capillary column injection ports), detectors (such as FID, TCD, ECD, FPD, etc.), and chromatographic column types according to their needs, adapting to multi scenario analysis requirements.
Analysis operation steps
Start the headspace sampler and wait for equilibrium to complete before the equipment automatically injects headspace gas into the chromatographic column.
The column temperature box is heated according to the set program, and the benzene derivatives (benzene, toluene, ethylbenzene, etc.) are separated in the chromatographic column and then sequentially enter the FID detector.
The data processing system collects chromatograms in real-time, records the retention time and peak area of each component.
Quantification using external standard method: Calculate the concentration of each component in the water sample by using a standard curve (prepare 5 concentration gradient benzene series standard solutions and plot peak area concentration curves).
After the analysis is completed, turn off the gas detector (first turn off H ₂, then turn off the air), cool the column temperature box to below 50 ℃, and turn off the carrier gas and equipment power.
Purchase suggestions
Clear requirements: Select detector type and chromatographic column specifications based on analysis objectives such as gas composition, organic pollutants, and oil composition. Determine whether portable devices (on-site testing) or laboratory grade high-precision instruments are needed.
Focus on modularity and scalability: Prioritize models that support multiple injection ports, multiple detectors, and peripheral device connections to adapt to future analysis needs upgrades.
Evaluate software functionality: The software should support method development, data storage, report generation, and remote monitoring, with some models providing automatic scoring and custom template functionality.
Considering maintenance costs: Modular design facilitates the replacement of components such as chromatography columns and detectors, reducing long-term usage costs; Choose a supplier that provides comprehensive after-sales service.