AutomatedLiquidHandlingQCQualityChecker

Automated Liquid Handling QC Quality Checker — Quality Control for Automated Liquid Handling Systems
ℹ️ Utility checks critical parameters of automated liquid handlers (Hamilton, Tecan, Eppendorf, etc.):
• Accuracy (Systematic Error) — deviation of mean volume from target
• Precision (CV / Random Error) — reproducibility of dispensing
• Compliance with ISO 8655 and USP <1058> (instrument qualification)
⚠️ CRITICAL: Dispensing errors >3% (accuracy) or CV >1% (precision) can lead to incorrect results in HPLC, ICP-MS, ELISA, and other assays!
Usage:
AutomatedLiquidHandlingQCQualityChecker.exe → demo mode (console output)
AutomatedLiquidHandlingQCQualityChecker.exe input.csv output.json → evaluate your data
Input format:
BatchNumber,TargetVolumeUL,MeanMeasuredVolumeUL,StandardDeviationUL,NumberOfReplicates,WaterDensityMGPerUL
Example:
CAL-HAMILTON-2026-001,100.0,99.8,0.4,10,0.9982
Supported equipment types:
• Automated Workstations (Hamilton STAR, Tecan Fluent, Beckman Biomek)
• Liquid Handlers (Eppendorf epMotion, Gilson Prep)
• Calibration Events (Regular gravimetric calibration)
— WHY IS THIS NEEDED?
Automated dispensing is the foundation of reproducibility in modern pharma labs:
• Sample preparation for elemental analysis (ICP-MS) requires high dilution accuracy
• Microplate setup for ELISA/biological tests requires low variability (CV)
• USP <1058> requires regular qualification (PQ) of all measurement systems, including pipettes and handlers
⚠️ CRITICAL:
• Accuracy: Deviation of mean volume from target. Limit typically ±3% (volume-dependent).
• Precision (CV): Coefficient of variation. Limit typically <1% for volumes >50 µL.
• Gravimetric method: Primary verification method. Uses water density (Z-factor) to convert mass to volume.
• Temperature and humidity: Must be controlled during calibration (ISO 8655).
Key features:
• Automatic calculation of % Error (Accuracy) and Coefficient of Variation (CV)
• Comparison with configurable pharmacopoeial/internal limits
• Support for gravimetric data (mass -> volume via density)
• LIMS-compatible report generation (LabWare) for qualification status (Pass/Fail)
Critical parameters:
• Accuracy: Within ±3.0% (example for 100 µL)
• Precision (CV): ≤ 1.0% (example for 100 µL)
• Water Density: Temperature-corrected (e.g., 0.9982 mg/µL at 20°C)
💡 Usage tips:
Perform gravimetric calibration at least quarterly or after maintenance.
Use analytical balances with appropriate weighing range (minimum weight).
For small volumes (<10 µL), use evaporation traps and specialized techniques.
If CV is high — check tips, seals, and air bubbles.
If Accuracy is low — perform software calibration (calibration factor) of the handler.
⚠️ Note: This utility does not control the robot directly but analyzes gravimetric test data loaded by the operator or exported from balance software. It is a key element of the laboratory's Quality Assurance (QA) system.