01 Solution Summary
Benzene series compounds such as benzene, toluene, ethylbenzene, and xylene in ambient air sampling samples are analyzed using a gas chromatography route. Samples enter the chromatographic flow path through a liquid autosampler; the chromatographic column separates the target components from matrix interferences, and the FID records the response. Quantitation and quality control use the following arrangements: calibration relationships are established according to HJ 584-2010 using benzene series standard solutions, and the air sample concentration is calculated from the sampling volume and the measurement results of the desorption solution. Each analytical batch is also set up with blanks, calibration checks, and applicable quality control samples.
02 Standards and Method Basis
Chinese standard: English standard titles on this page are descriptive translations. The cited Chinese text is authoritative.
| Standard number | Standard name | Status | Source |
|---|---|---|---|
| HJ 584-2010 | Ambient air — Determination of benzene series compounds — Activated carbon adsorption/carbon disulfide desorption-gas chromatography | Current | Official source |
03 Samples and Analytes
The specific samples areAmbient air sampling samples, and the analytes areBTEX compounds such as benzene, toluene, ethylbenzene, and xylene. Pretreatment, injection, and detection configurations are determined according to the sample state, target concentration, and the formal method adopted.
04 Method Principle
Volatile or vaporizable components in the sample are introduced into the gas chromatography system by a liquid autosampler. Each component is carried by the carrier gas through the chromatographic column and forms different retention due to differences in volatility and stationary phase interaction.
The FID is used to record the analytical response of benzene series compounds such as benzene, toluene, ethylbenzene, and xylene; quantitation uses calibration relationships established according to HJ 584-2010 with benzene series standard solutions, and the air sample concentration is calculated from the sampling volume and the measurement results of the desorption solution.
05 Sample Collection and Pretreatment
After activated carbon adsorption sampling, the ambient air sampling samples are desorbed with carbon disulfide. The processing steps are organized around the stable transfer of benzene series compounds such as benzene, toluene, ethylbenzene, and xylene and the control of matrix interferences.
06 Separation and Detection
The separation flow path is designed around benzene series compounds such as benzene, toluene, ethylbenzene, and xylene; the injection interface, chromatographic column, and FID form a continuous method chain. Method development and confirmation use real samples to check co-elution, blanks, and response stability.
07 Instrument System Configuration
| Module | Configuration | Role in This Solution |
|---|---|---|
| Sample inlet | Liquid Autosampler | Introduce a representative sample into the chromatographic flow path |
| Gas chromatograph main unit | GC | Complete the chromatographic separation of benzene series compounds such as benzene, toluene, ethylbenzene, and xylenes |
| Detection Unit | FID | Record the analytical responses of benzene series compounds such as benzene, toluene, ethylbenzene, and xylenes |
| Data system | In accordance with HJ 584-2010, establish calibration relationships using benzene series standard solutions, and calculate air sample concentrations from the sampling volume and the measurement results of the desorption solution | Complete calibration, calculation, and batch review |
08 Huishi Instruments system configuration
This application requiresGas chromatography (GC) analysis systemComplete the analysis of benzene series compounds such as benzene, toluene, ethylbenzene, and xylenes. During model selection, the sample state of ambient air sampling samples, the liquid autosampler, and the detection requirements should be considered together to determine the sample introduction interface, detector, and data system.
09 Analysis workflow
10 Qualitative, Quantitative, and Quality Control
In accordance with HJ 584-2010, establish calibration relationships using benzene series standard solutions, and calculate the concentrations of air samples from the sampling volume and the measurement results of the desorption solution. Method blanks are used to monitor contamination, calibration checks are used to monitor response drift, and duplicate samples or quality control samples are used to evaluate batch consistency.
11 Method and Configuration Selection
- The sample introduction module matches the physical state of ambient air sampling samples.
- The detection unit is limited to FID.
- The chromatographic flow path is configured with the separation of benzene series compounds such as benzene, toluene, ethylbenzene, and xylenes and major coexisting components as its objective.
12 Frequently Asked Questions
Why is gas chromatography used for benzene series compounds such as benzene, toluene, ethylbenzene, and xylenes?
Gas chromatography matches the physicochemical properties, sample inlet, and detection objectives of benzene series compounds such as benzene, toluene, ethylbenzene, and xylenes; the complete workflow also covers the treatment, separation, detection, and data quality control of ambient air sampling samples.
What samples is this solution applicable to?
The applicable samples are ambient air sampling samples. When the sample source or matrix changes, the effect of coexisting components on pretreatment, separation, and detection response should be re-evaluated.
What components or indicators are included in the detection targets?
The analytes are benzene, toluene, ethylbenzene, xylene, and other benzene series compounds; both the main text and configuration are bounded by this entity scope.
How is quality controlled for an analytical batch?
For each batch of samples, set up method blanks, calibration verification, duplicate samples, or applicable QC samples, and retain records of sample processing, instrument conditions, calibration, and calculations.
How are the sample introduction and detection modules matched in this solution?
The liquid autosampler is responsible for introducing the treated ambient air sampling samples into the analysis system, and the detection unit is configured for the response characteristics of benzene series compounds such as benzene, toluene, ethylbenzene, and xylenes; both must remain consistent with the method used.
13 Related Solutions and Knowledge
14 References
Get Configuration and Technical Consultation
Please provide the sample information for the ambient air sampling samples, the concentration range of benzene series compounds such as benzene, toluene, ethylbenzene, and xylene, the testing batch size, the method basis, and the existing equipment. Huishi Instruments will then prepare the configuration list accordingly.
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