EndotoxinBiologicProductQualityChecker

Endotoxin Biologic Product Quality Checker — Control of Bacterial Endotoxins (BET)

ℹ️  Utility checks critical parameters of Bacterial Endotoxins Test (USP <85> / Ph. Eur. 2.6.14):
   • Endotoxin content: below specified limit (e.g., <0.5 EU/mL)
   • Positive Product Control (PPC) Recovery: 50–200%
   • Standard Curve Coefficient of Determination (R²): ≥0.980

⚠️  CRITICAL: Exceeding endotoxin limit makes the product pyrogenic and dangerous!
   Incorrect PPC recovery indicates sample interference (inhibition/enhancement).

Usage:
 EndotoxinBiologicProductQualityChecker.exe                            → demo mode (console output)
 EndotoxinBiologicProductQualityChecker.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,MeasuredEndotoxin,SpecificationLimit,PPCRecoveryPercent,StandardCurveR2

Example:
 BIO-ENDO-2026-001,0.25,0.5,85.0,0.995

— WHY IS THIS NEEDED?
Bacterial endotoxins (lipopolysaccharides of Gram-negative bacteria) cause severe febrile reactions.
• For biological products (monoclonal antibodies, vaccines, recombinant proteins), endotoxin control is mandatory before release.
• LAL (Limulus Amebocyte Lysate) method or recombinant factors (rFC) are the standard.
• USP <85> and Ph. Eur. 2.6.14 require method validation for absence of interference (via PPC).
• Automation of criteria check prevents release of unsafe batches.

⚠️  CRITICAL:
• Endotoxin limit is calculated as K/M (K=5.0 EU/kg for parenterals, M=maximum dose).
• PPC Recovery 50-200% confirms that sample matrix does not interfere with clotting/chromogenic reaction.
• R² ≥ 0.980 ensures accuracy of quantification.
• Any deviation requires re-testing or sample dilution.

Key features:
• Assessment of product safety by endotoxin level.
• Control of assay validity via PPC and R².
• Support for Charles River, Lonza, Associates of Cape Cod systems.

Critical parameters:
• Endotoxin Level: < Specification Limit
• PPC Recovery: 50-200%
• Standard Curve R²: >= 0.980

💡 Usage tips:
1. Use certified standard endotoxins (CSE/RSE) for calibration.
2. Perform interference test during method development.
3. Avoid shaking samples to prevent foaming and protein denaturation.
4. Use endotoxin-free water for all dilutions.
5. Regularly maintain reading devices and check incubation temperature.

⚠️ Note: Biological products often contain proteins that may inhibit LAL reaction. In such cases, appropriate dilution or use of neutralizing buffers is required.