01 Solution Summary
Surface or deep soil samples undergo GPC Cleanup to remove lipids, pigments, and other macromolecular matrix, and the target fraction containing polycyclic aromatic hydrocarbons (PAHs) is collected and then subjected to subsequent GC, GC-MS, or HPLC determination. Quantification and quality control use the following arrangement: gel permeation cleanup only serves as pretreatment and does not directly give the content of polycyclic aromatic hydrocarbons (PAHs); the target fraction is qualitatively and quantitatively determined by subsequent GC, GC-MS, or HPLC methods, and cleanup blanks, spike recoveries, and fraction window checks are used to evaluate pretreatment quality. Analytical batches are also set up with blanks, calibration checks, and applicable QC samples.
02 Standards and Method Basis
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 areSurface or deep soil samples, and the analytes arePolycyclic aromatic hydrocarbons (PAHs). Pretreatment, injection, and detection configurations are determined according to the sample state, target concentration, and the formal method adopted.
04 Method Principle
When the sample extract passes through the GPC cleanup column, the macromolecular matrix and smaller target analytes partition differently in the pores; based on this, they elute in separate time windows and the target fraction is collected.
The cleanup system performs matrix removal and fraction collection; it does not perform polymer molecular weight determination.
05 Sample Collection and Pretreatment
Surface or deep soil samples first undergo extraction, dehydration, concentration, and reconstitution, then are filtered and introduced into the GPC cleanup system. The target fraction is concentrated and made up to volume for subsequent detection.
06 Separation and Detection
The fraction window is confirmed using standards or spiked samples to ensure that target analytes enter the collection interval while reducing interference from macromolecules such as lipids and pigments.
07 Instrument System Configuration
| Module | Configuration | Role in This Solution |
|---|---|---|
| Sample extraction | Gel permeation cleanup, solvent extraction | Transfer target analytes into a solution suitable for cleanup |
| GPC cleanup | GPC cleanup column and solvent delivery | Removal of macromolecular matrix |
| Fraction collection | Target window collection module | Collect the fraction containing target analytes |
| Subsequent analysis | GPC-Cleanup | Determination of polycyclic aromatic hydrocarbons (PAHs) |
08 Huishi Instruments system configuration
This application requiresGel permeation cleanup and fraction collection systemComplete the analysis of polycyclic aromatic hydrocarbons (PAHs). During selection, the inlet interface, detector, and data system should be determined based on the sample state of the surface or deep soil sample, the sample extract entering the gel permeation cleanup system, and detection requirements.
09 Analysis workflow
10 Qualitative, Quantitative, and Quality Control
Cleanup blanks, spiked recovery, fraction window verification, and subsequent detection QC jointly evaluate the entire workflow.
11 Method and Configuration Selection
- Cleanup tasks focus on matrix removal efficiency and target compound recovery.
- The fraction window is determined by the distribution of target compounds and matrix.
- The subsequent detection technique is determined by the properties of the target compounds and the formal detection method.
12 Frequently Asked Questions
Why is GPC cleanup used for polycyclic aromatic hydrocarbons (PAHs)?
GPC cleanup matches the physicochemical properties, sample inlet, and detection targets of polycyclic aromatic hydrocarbons (PAHs); the complete workflow also covers the treatment, separation, detection, and data quality control of surface or deep soil samples.
What samples is this solution applicable to?
The applicable samples are surface or deep soil samples. When the sample source or matrix changes, the impact of coexisting 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 polycyclic aromatic hydrocarbons (PAHs), and 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.
What information is required before configuration?
It is recommended to provide real samples, a list of target compounds, expected concentration ranges, testing batch size, the method to be followed, and existing equipment conditions.
How are results kept traceable?
Sample numbers, reference materials, processing batches, instrument methods, raw data, calibration results, and review records together form the result traceability chain.
Does GPC cleanup determine molecular weight?
GPC cleanup is used for complex matrix treatment and fraction collection, and the final content is determined by a subsequent chromatographic method.
13 Related Solutions and Knowledge
Get Configuration and Technical Consultation
Please provide sample information for the surface or deep soil sample, the concentration range of polycyclic aromatic hydrocarbons (PAHs), the testing batch size, the method basis, and existing equipment. Huishi Instruments will then prepare a configuration list.
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