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BTEX · Matrix-led sample introduction · GC

BTEX Analysis by Gas Chromatography

BTEX analysis starts with the sample matrix: air, water and solid samples require different collection and introduction routes. After the route is selected, the GC column, detector and calibration plan are matched to the adopted method and reporting goal.

Choose the route from the sample matrix

AirSorbent-tube collection with a compatible thermal-desorption route
WaterHeadspace, purge-and-trap or extraction as required by the method
SolidsValidated extraction or thermal route appropriate to the matrix
TechnologyGC with a detector selected for the method

Chromatographic separation and detection

The separation must resolve benzene, toluene, ethylbenzene and xylene isomers from matrix components. FID is suitable for many hydrocarbon-focused workflows; confirmation requirements or more complex matrices can call for different selectivity or GC-MS.

Calibration and quality control

Prepare calibration and quality-control samples through the same collection or preparation route used for the samples. Include blanks, continuing calibration checks, replicate analysis and matrix-appropriate recovery checks.

Configuration workflow

Identify matrix and adopted method
Choose collection and introduction route
Match column and detector
Verify the complete workflow with representative samples

Related systems

Explore gas chromatographs, headspace samplers and thermal desorption systems according to the matrix and method.

Frequently asked questions

Which sample-introduction route should be used for BTEX?

Use the route required by the sample matrix and adopted method. Water, air and extracted solid samples do not share one universal introduction technique.

Is FID suitable for every BTEX method?

FID is useful for hydrocarbon detection in suitable GC methods. Methods requiring compound confirmation or different selectivity may require another detector or GC-MS.

Discuss the analytical configuration

Send the sample source, target components, expected range, adopted method and daily workload. Huishi Instruments will review the sampling path, separation, detectors and gas supply as one system.

Request a configuration