Charm EPIC Plus ATP-Based Rapid Sterility Assurance System

Overview

The Charm EPIC Plus ATP-Based Rapid Sterility Assurance System is an automated, bioluminescence-driven platform engineered for rapid microbial contamination screening in commercially sterile and extended-shelf-life (ESL) products. Unlike conventional plate-count or membrane filtration methods—which require ≥7 days for colony development—the EPIC Plus system leverages the quantitative detection of total adenosine triphosphate (ATP) as a surrogate biomarker for viable microbial load. This approach is grounded in the well-established correlation between intracellular ATP concentration and metabolically active microorganisms, including spores, vegetative bacteria, yeasts, and molds. The system is specifically validated for intact-package testing of UHT-treated dairy beverages, aseptically filled juices, retorted low-acid foods, and other terminally sterilized products where post-process contamination must be ruled out prior to release. By eliminating sample homogenization, plating, and subjective colony interpretation, the EPIC Plus delivers objective, reproducible sterility assurance data within 36–48 hours—enabling real-time release decisions without compromising regulatory rigor.

Key Features

• Fully automated workflow: Integrated pipetting, reagent dispensing, temperature-controlled incubation (36°C ± 0.5°C), luminescence measurement, and data reporting—all performed without manual intervention after initial sample loading.
• Intact-package incubation capability: Samples are incubated in their original sealed containers (e.g., Tetra Pak®, PET bottles, aluminum cans), preserving sterility integrity and eliminating risk of environmental contamination during sampling.
• High-throughput 96-well microplate format: Supports parallel processing of up to 96 samples per run, with programmable sample grouping, control placement, and duplicate validation.
• Ultra-sensitive bioluminescent detection: Uses recombinant firefly luciferase/luciferin reagents with detection limit < 10 fg ATP (equivalent to ~10² CFU/mL for typical bacterial contaminants).
• Robust thermal management: Precision Peltier-based incubation block ensures uniform temperature distribution across all wells, critical for consistent microbial metabolic activation.
• Modular hardware design: Compact footprint (W × D × H: 52 × 58 × 43 cm); CE-marked; compatible with standard laboratory power (100–240 VAC, 50/60 Hz).

Sample Compatibility & Compliance

The EPIC Plus system accommodates liquid and semi-liquid products with viscosity ≤ 1000 cP—including UHT milk, ESL cream, plant-based beverages, nutritional supplements, and ready-to-drink teas. It has been validated per ISO 11133:2014 (microbiological culture media preparation) and aligned with ASTM E2694-21 (standard guide for ATP bioluminescence assays in food safety). While not a replacement for pharmacopeial sterility tests (USP ), it serves as a scientifically justified, risk-based screening tool for commercial sterility verification under ICH Q5C and FDA Guidance for Industry on Sterile Drug Products. When deployed with EPICLink software configured for audit trail, electronic signatures, and data archiving, the system meets core requirements of FDA 21 CFR Part 11 and EU Annex 11 for computerized systems used in GMP-regulated manufacturing.

Software & Data Management

EPICLink v5.x is a Windows-based application that provides full instrument control, real-time monitoring, and traceable data handling. Each assay generates a timestamped run log containing operator ID, sample IDs, calibration status, raw RLU (relative light unit) values, background-subtracted ATP concentrations, pass/fail flags based on user-defined thresholds, and statistical summaries (mean, SD, CV%). Data export options include CSV, PDF reports, and direct integration with LIMS via ODBC. All user actions—including method edits, result overrides, and report generation—are recorded in an immutable audit trail compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Optional 21 CFR Part 11 compliance package includes role-based access control, electronic signature workflows, and periodic backup validation protocols.

Applications

• Rapid release testing of UHT dairy and non-dairy beverages prior to warehouse dispatch.
• Root cause investigation of spoilage incidents in ESL product lines.
• Validation and routine monitoring of aseptic filling line hygiene performance.
• Environmental monitoring program support (swab extracts, rinse water, air samplers).
• Supplier qualification and incoming raw material screening (e.g., whey protein isolates, stabilizers).
• Stability study endpoint analysis for accelerated shelf-life trials.

FAQ

Does the EPIC Plus replace pharmacopeial sterility testing?
No—it is a rapid screening tool for commercial sterility assessment, not a compendial sterility test. It complements, rather than substitutes, USP , Ph. Eur. 2.6.1, or JP 4.07 when used within a science- and risk-based quality system.
Can the system detect spores?
Yes. The 36–48 h incubation period allows germination and metabolic activation of bacterial endospores (e.g., Bacillus and Geobacillus spp.), enabling ATP-based detection at levels relevant to spoilage risk.
Is method validation required before implementation?
Yes. Users must perform product-specific validation per ICH Q2(R2), including specificity, limit of detection, precision, and robustness studies—particularly for high-fat or preservative-containing matrices.
What maintenance does the EPIC Plus require?
Daily: External surface wipe-down and waste reservoir emptying. Quarterly: Optical path cleaning, pipette calibration verification, and temperature uniformity mapping. Annual: Full performance qualification (PQ) by certified Charm service engineer.
Is training provided with purchase?
Yes. Standard installation includes on-site operator and administrator training covering operation, troubleshooting, software configuration, and compliance documentation—delivered by Charm-certified field application specialists.