Where dilution occurs in the instrument
Meter original sample and diluent separately, and check the ratio and mixing at the receiver. Assess blanks, spikes and shared-section residue for the field matrix and analytical target.
Check sample and diluent volumes separately, then assess the complete operation using blanks, spikes or ratio checks. Include preservation state, settling between aliquots and shared-path residue when evaluating the final concentration.
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 environmental sample dilution, confirm actual sample, diluent or internal-standard volumes, concentrations at each stage, mixing and secondary-sampling conditions.
Organize the sequence by actual architecture
- Define sample, diluent and target ratio for the analyte and method. Check source identities, wetted materials and receiver. Preserve collection and preparation times when evaluating the environmental sample.
- Meter sample and diluent separately through suitable syringe-driven paths, measure actual receipt and complete the required mixing.
- Assess the complete dilution with method-permitted ratio, blank or spike checks. Record the effects of matrix changes and residue on analytes.
Define operating conditions for this task
| To define | Details |
|---|---|
| Actual operating conditions | Collection and preparation times, preservation state, settling between aliquots, aliquot order, actual sample and diluent volumes, and mixing before resampling |
| Acceptance target | Measure the sample and diluent delivered to the receiving vessel and verify mixing. Compare successive aliquots for settling bias, then assess blanks and method-appropriate spike recovery for the preserved sample matrix. |
| Fault localization | Settling, storage changes or shared-path residue can alter the aliquot composition even when the volume ratio is correct. Review the affected aliquot and its preparation history before repeating the dilution. |
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 the sample and diluent delivered to the receiving vessel and verify mixing. Compare successive aliquots for settling bias, then assess blanks and method-appropriate spike recovery for the preserved sample matrix.
Evaluate blanks, recovery, aliquot representativeness and restart according to the method.
Locate abnormalities and restore the next operation
Settling, storage changes or shared-path residue can alter the aliquot composition even when the volume ratio is correct. Review the affected aliquot and its preparation history before repeating the dilution.
Review actual results of affected steps before resuming the next action.
Dilution metering can share general engineering methods, but field preservation, particles and analyte loss require separate checks.