Where filtration occurs in the instrument
Biomass or cell measurements have different filtration requirements from dissolved-metabolite measurements. Retain or remove particles according to the target, and evaluate filter adsorption, increasing pressure drop and sample bias after replacement.
Filter adsorption, increasing pressure drop and replacement can change a sample. Record method-specified particle treatment and before/after filtration differences.
Product responsibilities in this operation
Tubing, fittings and the protection components described here form the actual path. Validate materials, passage dimensions, connection volume and maintenance state with this operation.
For online sampling, define the analytical target, filter material and pore size, filtration location, added volume, actual pressure drop and permitted maintenance.
Organize the sequence by actual architecture
- Determine whether filtration is permitted for the analytical target. Specify the cells, biomass or liquid-phase components to retain and the treatment location separately.
- Confirm filter material and conditions for the method. Compare analytes and actual passed volume before and after filtration, checking adsorption and pressure-drop changes.
- After replacement or maintenance, recheck blanks, the first sample and representativeness. Blockage prevention alone does not establish sampling performance.
Define operating conditions for this task
| To define | Details |
|---|---|
| Actual operating conditions | Analytical target, filter material/pore size, filtration location, added volume, actual pressure drop and permitted maintenance |
| Acceptance target | Compare analytes, recovery and blanks before and after filtration. Check pressure drop and actual flow after loading accumulates, and the first sample after replacement. |
| Fault localization | Blockage, adsorption, leakage or added filter-assembly volume can change the sample and its arrival time. |
Compare product configurations by the roles on this page
| Product | Configuration option | Conditions to verify |
|---|---|---|
| PE-Series Filters | Particle retention permitted by the method | Cards show representative configurations. Select actual pore size and filter material for the target, pressure drop and recovery requirements. |
| Tubing materials and dimensions | Connection paths and shared volume | Bore, length, load and actual formulation jointly determine materials and dimensions |
| Rigid-tubing fittings | Tube-end positioning and sealed connections | Check tube outer diameter, threads, seal structure and port-bottom geometry |
Validate operation results at the receiver
Compare analytes, recovery and blanks before and after filtration. Check pressure drop and actual flow after loading accumulates, and the first sample after replacement.
Compare process and collected samples, checking target retention, contamination and reactor-volume changes.
Locate abnormalities and restore the next operation
Clogging, adsorption, leakage or added filter-assembly volume can change the sample and arrival time.
Confirm the filtration path and sealing, then recheck actual flow, sample renewal and method results before resuming.
Removing cell aggregates may change the measured target. Reduced valve-body contact through a pinch valve does not make the entire path sterile.