Where sample transfer occurs in the instrument
Define sampling and transfer for the protein concentration, formulation and vessel. Assess wetted-surface adsorption, aggregation and complete-path recovery as well as delivered volume. Water-metering performance does not establish protein-processing results.
Pass protein samples through the actual tubing and vessels and compare with reference handling. Water calibration assesses volume; protein recovery assesses materials and workflow. Record them separately.
Product responsibilities in this operation
Syringe drive and valve positions jointly organize aspiration, holding and dispensing. Record working volume, remaining inventory and replenishment timing according to the sequence.
For protein and antibody sample transfer, confirm the actual aliquot, source volume remaining, probe height, aspiration/dispense speed and system liquid.
Organize the sequence by actual architecture
- Confirm the fixed-path or syringe-driven transfer architecture for this task. Record protein formulation, concentration, temperature, working volume, all wetted materials and vessels.
- Sample and deliver under actual wetted-contact and pressure conditions. Check received volume, residence time and residual liquid.
- Pass protein through the complete path and compare with reference handling. Measure volume, target recovery, aggregation or method response, and blanks separately.
- After sample changeovers or maintenance, check shared-path residue and the first cycle after restart. See the relevant applications for disposable-tip sample preparation and pressurized separation.
Define operating conditions for this task
| To define | Details |
|---|---|
| Actual operating conditions | Actual sample volume, remaining source volume, probe-tip height, aspiration/dispensing speed and system liquid |
| Acceptance target | Measure received volume and compare protein recovery with reference handling at the actual formulation, concentration, temperature and contact time. Assess aggregation or method response and sample-to-sample carryover separately. |
| Fault localization | Adsorption, aggregation, hanging droplets or shared-path residue can reduce target recovery despite acceptable volume. Changing the pump command alone cannot distinguish these mechanisms. |
Compare product configurations by the roles on this page
| Product | Configuration option | Conditions to verify |
|---|---|---|
| HLD rotary-valve syringe pump | Aspiration, holding and dispensing with a rotary valve | Check source/outlet valve positions, capacity budget and replenishment timing |
| HMD solenoid-valve syringe pump | Metered aspiration and dispensing with solenoid valves | Check open/closed and power-off states, working volume and replenishment cycle |
Validate operation results at the receiver
Measure received volume and compare protein recovery with reference handling at the actual formulation, concentration, temperature and contact time. Assess aggregation or method response and sample-to-sample carryover separately.
Include the source vessel, pump, tubing and receiver in the comparison. Record the first sample after a changeover or maintenance so surface retention is not hidden by steady repeated transfer.
Locate abnormalities and restore the next operation
Adsorption, aggregation, hanging droplets or shared-path residue can reduce target recovery despite acceptable volume. Changing the pump command alone cannot distinguish these mechanisms.
Preserve sample identity and establish the volume and protein already recovered. Inspect the wetted path and residue, then apply the experimental procedure to the remaining sample; verify blanks and the first recovered transfer before restarting.
A material name alone does not establish low adsorption. Confirm sample preparation, loading and pressurized separation branches separately.