Tc99mDMSAIIIRadiochemicalPurityChecker

Utility description: Tc-99m DMSA(III) Radiochemical Purity Checker

Tc-99m DMSA(III) Radiochemical Purity Checker — Technetium-99m DMSA(III) for renal scintigraphy

ℹ️  Utility checks critical parameters of Tc-99m DMSA(III):
    • Radiochemical purity (≥90-95%)
    • Free pertechnetate (≤5%)
    • Reduced/hydrolyzed technetium (≤5%)
    • Aluminum oxide (<5 ppm)
    • pH (4.0-7.0)
    • Endotoxins (<175 EU/mL)
    • Sterility, heavy metals, stability time (≤4 hours)

⚠️  CRITICAL: Low RCP <90% → accumulation in thyroid gland and stomach!
    Free pertechnetate >5% → false imaging results!
    Stability time exceedance >4h → complex degradation and reduced efficacy!

Usage:
  Tc99mDMSAIIIRadiochemicalPurityChecker.exe                            → demo mode (console output)
  Tc99mDMSAIIIRadiochemicalPurityChecker.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,RadiochemicalPurityPercent,FreePertechnetatePercent,ReducedHydrolyzedTechnetiumPercent,AluminumOxidePPM,pH,EndotoxinsEU_per_mL,SterilityTest,HeavyMetalsPPM,HoursSincePreparation

Example (sterility: 0=sterile, 1=contaminated):
  TC99M-DMSA-2026-001,97.5,1.2,1.3,2.5,5.5,50.0,0,3.0,2.0

— WHY IS THIS NEEDED?
Technetium-99m DMSA(III) — widely used radiopharmaceutical for renal cortical visualization:
• 6.02-hour half-life — optimal for diagnostics
• 140 keV gamma radiation — ideal for gamma cameras
• High affinity for renal cortex (cortical visualization)
• Clinically proven efficacy in kidney function assessment, scarring, pyelonephritis

⚠️  CRITICAL:
• Radiochemical purity ≥90-95% — ensures specific accumulation in kidneys
• Free pertechnetate ≤5% — free Tc-99m accumulates in thyroid, stomach, and salivary glands, creating artifacts
• Reduced/hydrolyzed technetium ≤5% — colloidal technetium is taken up by reticuloendothelial system (liver, spleen)
• Aluminum oxide <5 ppm — excess Al³⁺ disrupts complexation and reduces RCP to 99.5-99.69%
• pH 4.0-7.0 — critical for DMSA complex stability and prevention of dissociation
• Endotoxins <175 EU/mL — critical for IV administration!
• Sterility — MANDATORY for all parenteral forms!
• Usage time ≤4 hours — complex is unstable, oxidation and dissociation occur

Key features:
• Radiochemical purity check (main quality parameter)
• Control of two main impurities: free pertechnetate and reduced technetium
• Aluminum oxide monitoring as critical labeling quality factor
• pH control for complex stability assurance
• Time since preparation check (critical for short-lived isotopes)
• Comprehensive microbiological safety assessment

Critical parameters:
• Radiochemical purity: ≥90.0% (optimal ≥95%)
• Free pertechnetate: ≤5.0%
• Reduced/hydrolyzed technetium: ≤5.0%
• Aluminum oxide: <5.0 ppm
• pH: 4.0–7.0
• Endotoxins: <175 EU/mL
• Sterility: no microbial growth
• Heavy metals: ≤10 ppm
• Stability time: ≤4 hours

💡 Usage tips:
1. Radiochemical purity controlled by TLC or HPLC with radio-detector
2. Free pertechnetate determined on silica gel strips (mobile phase: acetone)
3. Colloidal technetium determined on paper (mobile phase: saline)
4. Aluminum controlled by colorimetric method or ICP-MS
5. All measurements should be performed within 4 hours after synthesis
6. If RCP <90% — batch rejected (critical parameter for clinical use)!

⚠️ Note: Tc-99m DMSA(III) is one of the most important diagnostic radiopharmaceuticals for nephrology. Low radiochemical purity leads to false-positive results (accumulation in thyroid, stomach) and reduced diagnostic value. Quality control must be performed before each use.