Process & filtration objectives
Sample preparation connects the original material to the analytical instrument. Filtration can reduce suspended particles affecting injection and chromatography, but adsorption, hold-up and material background can also change the reported result.
The analyte, solvent, matrix and analytical method together determine consumable selection. For trace samples, recovery and blank background may matter more than speed. Vials and closures are part of the complete contact path.
Typical process pathway
- 01
Sampling and identification
Retain source, batch and container information, distinguishing original samples, extracts and diluted solutions.
- 02
Matrix preparation
Follow the established extraction or preparation method, observing suspended loading and solvent composition.
- 03
Before injection
Use membrane and device choices matched to the method, assessing analyte recovery, retained volume and blank signals.
- 04
Vial transfer and analysis
Record vial, closure and storage time, linking preparation batches with the instrument data.
This is a typical task pathway. Confirm sequence, equipment and operating conditions for the project.
Filtration points & selection rationale
| Process point | Filtration task | Selection rationale |
|---|---|---|
| Extract clarification | Manage suspended particles | Consider matrix loading and adsorption of the target analyte together. |
| Mobile-phase preparation | Control particles according to the analytical method | Review solvent composition, membrane and collection-container background. |
| Transfer to vial | Preserve representative sample composition | Consider small-volume losses, closure compatibility and traceable labeling. |
Verification & operating records
| Evaluation item | Recording & comparison |
|---|---|
| Analyte recovery | Use suitable spiked or paired samples to distinguish filtration losses from effects of the original matrix. |
| Blank background | Separate solvent, consumable and full-process blanks to locate introduced peaks or background signals. |
| Repeatability | Process matched samples repeatedly, comparing result variation and recovered volume rather than discharge speed alone. |
Application questions
Does a smaller pore always improve analytical accuracy?
No. Adsorption and sample representativeness also matter; selection should serve the analytical method.
Should a fixed initial filtrate volume always be discarded?
There is no universal volume for every sample. Method validation should address material background, adsorption and the amount of sample available.
Related product pathways
Chromatography Supplies ↗
Match sample preparation, analyte recovery and instrument protection to your analytical method.
LABORATORYSample Preparation ↗
Maintain sample integrity and consistent handling through sampling, aliquoting, centrifugation and pipetting.
This page outlines general application considerations. Confirm product suitability against actual operating conditions and technical documentation.