01 Solution Summary
The 65 volatile organic compounds specified in HJ 605-2011 in soil and sediment samples are determined by purge and trap-GC-MS according to HJ 605-2011. Volatile components are purged from the soil or sediment sample and, after trapping, thermal desorption, and focusing transfer, enter the GC-MS. The following arrangements are used for quantification and quality control: qualitative identification, calibration, and sample result calculation are performed according to HJ 605-2011, and method blanks, spikes, and internal standard monitoring are set up. Analytical batches are also set with blanks, calibration verifications, 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 605-2011 | Soil and sediment — Determination of volatile organic compounds — Purge and trap/gas chromatography-mass spectrometry | Current | Official source |
03 Samples and Analytes
The specific samples areSoil and sediment samples, and the analytes are65 volatile organic compounds specified in HJ 605-2011. Pretreatment, injection, and detection configurations are determined according to the sample state, target concentration, and the formal method adopted.
04 Method Principle
An inert gas passes through a closed solid sample system, carrying volatile target analytes into the trap. After the trap is heated and desorbed, the target analytes enter the GC through focusing and inert transfer.
GC completes the separation of target compounds, and MS combines retention behavior and characteristic ions to complete qualitative identification and determination.
05 Sample Collection and Pretreatment
Sampling, sealing, storage, and sample weighing processes reduce sample exposure and volatilization loss. Samples, standards, blanks, and spiked samples use consistent purge, trap, and desorption procedures.
06 Separation and Detection
After desorption, the target analytes enter the GC through an inert transfer path, are separated by a column suitable for volatile organic compounds, and then enter the MS to acquire the ion signals specified by the method.
07 Instrument System Configuration
| Module | Configuration | Role in This Solution |
|---|---|---|
| Sample unit | Sealed solid sample purge vessel | Reduce loss of VOCs from soil and sediment |
| Purge and trap | Inert purge gas path and VOCs trap | Carry volatile components out and enrich them |
| Desorption and transfer | Thermal desorption, focusing, and inert transfer channel | Introduce target analytes into the GC |
| GC-MS | GC separation and MS detection | Complete separation, identification, and determination of target analytes |
08 Huishi Instruments system configuration
This application requiresGC-MS hyphenated systemComplete the analysis of the 65 volatile organic compounds specified in HJ 605-2011. For configuration selection, determine the sample introduction interface, detector, and data system in accordance with the sample state of soil and sediment samples, thermal desorption after purge and trap and transfer to the chromatography system, and detection requirements.
09 Analysis workflow
10 Qualitative, Quantitative, and Quality Control
Complete identification, calibration, and calculation of sample results according to HJ 605-2011, and set up method blanks, spiked samples, and internal standard monitoring. Sample preservation, method blanks, surrogate/internal standard response, spike recovery, and residual blanks after high-concentration samples are jointly included in batch quality control.
11 Method and Configuration Selection
- The standard method is HJ 605-2011.
- The samples are soil and sediment, and VOCs loss must be carefully controlled during sampling and sample weighing.
- The detection unit uses MS and is separate from the sample unit and quality control boundaries of the water sample purge and trap method.
12 Frequently Asked Questions
Why is HJ 605-2011 purge-and-trap GC-MS used for the 65 volatile organic compounds specified in HJ 605-2011?
HJ 605-2011 purge-and-trap GC-MS matches the physicochemical properties, sample inlet, and detection targets of the 65 volatile organic compounds specified in HJ 605-2011, and the complete workflow also covers treatment, separation, detection, and data quality control for soil and sediment samples.
What samples is this solution applicable to?
The applicable samples are soil and sediment samples. When the sample source or matrix changes, the impact of coexisting components on the pretreatment, separation, and detection response should be re-evaluated.
What components or indicators are included in the detection targets?
The analytes are the 65 volatile organic compounds specified in HJ 605-2011, and both the main text and the configuration are bounded by this substance 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 thermal desorption after purge and trap and transfer to the chromatography system is responsible for introducing the treated soil and sediment samples into the analytical system, and the detection unit is configured for the response characteristics of the 65 volatile organic compounds specified in HJ 605-2011; both must remain consistent with the method used.
Can the same sample treatment be used for soil VOCs and VOCs in water?
No. The sample matrices, sampling containers, sample treatment, and quality control requirements differ between the two, and the corresponding formal methods should be followed separately.
13 Related Solutions and Knowledge
14 References
Get Configuration and Technical Consultation
Please provide sample information for the soil and sediment samples, the concentration ranges of the 65 volatile organic compounds specified in HJ 605-2011, the testing batch size, the method basis, and existing equipment. Huishi Instruments will use this to compile a configuration list.
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