01 Solution Summary
Epichlorohydrin in drinking water samples is analyzed by a gas chromatography route. Samples enter the chromatographic flow path via a liquid autosampler; the analytical column completes separation of the target component from matrix interferences, and the response is then recorded by ECD. Quantitation and quality control use the following arrangements: calibration relationships are established around epichlorohydrin using reference materials matched to the detection channel; identification criteria, quantitation mode, and result units are all subject to the applicable method; blanks, calibration checks, parallel samples, and quality control samples form batch quality control. The analytical batch also includes 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 |
|---|---|---|---|
| GB/T 5750.8-2023 | Standard Examination Methods for Drinking Water — Part 8: Organic Indicators | Current | Official source |
03 Samples and Analytes
The specific samples areDrinking water samples, and the analytes areEpichlorohydrin. 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.
ECD is used to record the analytical response of epichlorohydrin; the quantitation mode uses calibration relationships established around epichlorohydrin with reference materials matched to the detection channel; identification criteria, quantitation mode, and result units are all subject to the applicable method; blanks, calibration checks, parallel samples, and quality control samples form batch quality control.
05 Sample Collection and Pretreatment
Drinking water samples are subjected to solvent extraction. The treatment steps are organized around the stable transfer of epichlorohydrin and control of matrix interferences.
06 Separation and Detection
The separation flow path is designed around epichlorohydrin, with the injection interface, analytical column, and ECD forming 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 epichlorohydrin |
| Detection Unit | ECD | Record the analytical response of epichlorohydrin |
| Data system | Calibration relationships are established around epichlorohydrin using reference materials matched to the detection channel; identification criteria, quantitation mode, and result units are all subject to the applicable method; blanks, calibration checks, parallel samples, and quality control samples form batch quality control | Complete calibration, calculation, and batch review |
08 Huishi Instruments system configuration
This application requiresGas chromatography (GC) analysis systemComplete the analysis of epichlorohydrin. When selecting a configuration, the injection interface, detector, and data system should be determined based on the sample state of drinking water samples, the liquid autosampler, and the detection requirements.
09 Analysis workflow
10 Qualitative, Quantitative, and Quality Control
Calibration relationships are established around epichlorohydrin using reference materials matched to the detection channel; identification criteria, quantitation mode, and result units are all subject to the applicable method; blanks, calibration checks, parallel samples, and quality control samples form batch quality control. Method blanks are used to monitor contamination, calibration checks are used to monitor response drift, and parallel samples or quality control samples are used to evaluate batch consistency.
11 Method and Configuration Selection
- The sample introduction module is matched to the physical state of drinking water samples.
- The detection unit is limited to ECD.
- The chromatographic flow path is configured with the goal of separating epichlorohydrin and major coexisting components.
12 Frequently Asked Questions
Why is gas chromatography used for epichlorohydrin?
Gas chromatography matches the physicochemical properties of epichlorohydrin, the sample inlet, and the detection target; the complete route also covers treatment, separation, detection, and data quality control of drinking water samples.
What samples is this solution applicable to?
The applicable samples are drinking water samples. When the sample source or matrix changes, the influence of co-existing components on pretreatment, separation, and detection response should be re-evaluated.
What components or indicators are included in the detection targets?
The detection target is epichlorohydrin; the main text and configuration are both bounded by the scope of this entity.
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 drinking water samples into the analysis system, and the detection unit is configured for the response characteristics of epichlorohydrin; both must be consistent with the method used.
13 Related Solutions and Knowledge
14 References
Get Configuration and Technical Consultation
Please provide sample information for drinking water samples, the concentration range of epichlorohydrin, testing batch size, method basis, and existing equipment. Huishi Instruments will use this to prepare the configuration list.
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