01 Solution Summary
Dissolved gases in cable oil, such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide, are analyzed using a gas chromatography route. The sample enters the chromatographic flow path through quantitative injection of the extracted gas, the target components are separated from matrix interferences by the chromatographic column, and the responses are then recorded by FID and TCD. Quantification and quality control are arranged as follows: standard gases are used to establish calibration relationships; the cable oil sample first undergoes degassing and dissolved gas extraction, after which the extracted gas undergoes quantitative injection and gas chromatographic determination. Each analysis batch also includes a blank, calibration verification, 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.
Method basis: application method. The laboratory may enter the name and version of the adopted formal method into the project file.
03 Samples and Analytes
The specific samples areCable oil, and the analytes areDissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide. 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 quantitative injection of the extracted gas. Driven by the carrier gas, the components pass through the chromatographic column and exhibit different retention due to differences in volatility and interaction with the stationary phase.
FID and TCD are used to record the analytical responses of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide; the quantification approach uses standard gases to establish calibration relationships; the cable oil sample first undergoes degassing and dissolved gas extraction, after which the extracted gas undergoes quantitative injection and gas chromatographic determination.
05 Sample Collection and Pretreatment
After representative sampling of insulating oil, cable oil undergoes insulating oil degassing and dissolved gas extraction. The treatment steps are organized around the stable transfer of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide and the control of matrix interferences.
06 Separation and Detection
The separation flow path is designed around dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide; the injection interface, chromatographic column, and FID and TCD form a continuous method chain. Method development and validation use real samples to check co-elution, blanks, and response stability.
07 Instrument System Configuration
| Module | Configuration | Role in This Solution |
|---|---|---|
| Sample inlet | Quantitative injection of extracted gas | Introduce a representative sample into the chromatographic flow path |
| Gas chromatograph main unit | GC | Complete the chromatographic separation of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide |
| Detection Unit | FID, TCD | Record the analytical responses of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide |
| Data system | Standard gases are used to establish calibration relationships; the cable oil sample first undergoes degassing and dissolved gas extraction, after which the extracted gas undergoes quantitative injection and gas chromatographic determination | Complete calibration, calculation, and batch review |
08 Huishi Instruments system configuration
This application requiresGas chromatography (GC) analysis systemComplete the analysis of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide. When selecting a configuration, the injection interface, detector, and data system should be determined based on the sample state of the cable oil, quantitative injection of the extracted gas, and detection requirements.
09 Analysis workflow
10 Qualitative, Quantitative, and Quality Control
Standard gases are used to establish calibration relationships; the cable oil sample first undergoes degassing and dissolved gas extraction, after which the extracted gas undergoes quantitative injection and gas chromatographic determination. Method blanks are used to monitor contamination, calibration verification is used to monitor response drift, and duplicate samples or quality control samples are used to evaluate batch consistency.
11 Method and Configuration Selection
- The injection module matches the physical state of the cable oil.
- The detection unit is limited to FID and TCD.
- The chromatographic flow path is configured to target the separation of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide and main coexisting components.
12 Frequently Asked Questions
Why is gas chromatography used for dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide?
Gas chromatography is matched to the physicochemical properties, sample inlet, and detection targets of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide; the complete route also covers the treatment, separation, detection, and data quality control of cable oil.
What samples is this solution applicable to?
The applicable sample is cable oil. 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 dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide; both the main text and the 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?
Quantitative injection of the extracted gas is responsible for introducing the treated cable oil into the analysis system, and the detection unit is configured for the response characteristics of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide; both must be consistent with the method used.
13 Related Solutions and Knowledge
Get Configuration and Technical Consultation
Please provide the sample information for the cable oil, the concentration ranges of dissolved gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide, the testing batch size, the method basis, and the existing equipment. Huishi Instruments will prepare a configuration list based on this.
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