ElementalImpuritiesICPQualityChecker

Elemental Impurities ICP Quality Checker — Control of Elemental Impurities (ICP-MS/OES)

ℹ️  Utility checks critical parameters of toxic element content according to ICH Q3D:
   • Class 1 (Cd, Pb, As, Hg): Strict control due to high toxicity
   • Class 2A (Co, V, Ni): Control if likely to be present in the drug
   • Limits (ppm) calculated as PDE (mcg/day) / MDD (g/day)

⚠️  CRITICAL: Exceeding elemental impurity limits is unacceptable for drug registration!
   Requires use of validated ICP-MS or ICP-OES methods (USP <233>).

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

Input format:
BatchNumber,MaxDailyDoseGrams,CadmiumPPM,LeadPPM,ArsenicPPM,MercuryPPM,CobaltPPM,VanadiumPPM,NickelPPM

Example:
 API-ELEM-2026-001,1.0,0.5,0.5,1.0,0.5,2.0,4.0,10.0

— WHY IS THIS NEEDED?
ICH Q3D guideline and pharmacopoeias (USP <232>, Ph. Eur. 5.20) require assessment and control of elemental impurities.
• Impurities may originate from catalysts, reagents, water, equipment, or packaging.
• Element toxicity is assessed via Permitted Daily Exposure (PDE).
• ICP-MS (Inductively Coupled Plasma Mass Spectrometry) methods provide necessary sensitivity (ppb/ppm level).
• Automatic limit calculation based on daily dose allows flexible application for different drugs.

⚠️  CRITICAL:
• Route of administration (oral, parenteral, inhalation) affects PDE values. This utility uses conservative oral defaults.
• Sample preparation (microwave digestion) is critical for complete metal dissolution.
• Spectral and matrix interferences must be controlled during analysis.
• Use of internal standards (ISTD) is mandatory for instrument drift correction.

Key features:
• Calculation of individual limits based on MDD.
• Check of Class 1 and 2A elements.
• Support for ICP-MS and ICP-OES data.

Critical parameters:
• Cd: <= 0.5 / MDD ppm
• Pb: <= 0.5 / MDD ppm
• As: <= 1.5 / MDD ppm
• Hg: <= 3.0 / MDD ppm
• Co: <= 5.0 / MDD ppm
• V: <= 10.0 / MDD ppm
• Ni: <= 20.0 / MDD ppm

💡 Usage tips:
1. Always specify the accurate Maximum Daily Dose (MDD) of the product.
2. For parenteral products, use corresponding, stricter PDE values.
3. Regularly calibrate the instrument using multi-element standards.
4. Verify method Limits of Detection (LOD) and Quantitation (LOQ).
5. Maintain a logbook for plasma source and mass filter maintenance.

⚠️ Note: Some elements (e.g., arsenic and mercury) exist in different chemical forms (speciation) which may have different toxicities. ICP-MS determines total element content.