LOGAN UDT-812A-8 8-Position Automated Dissolution Tester

Overview

The LOGAN UDT-812A-8 is an 8-position online dissolution tester engineered for regulatory-compliant, high-reproducibility drug release testing in pharmaceutical development and quality control laboratories. It operates on the USP Apparatus 1 (basket) and Apparatus 2 (paddle) principles, supporting standardized dissolution methodologies per USP , Ph. Eur. 2.9.3, and JP 17. The system integrates precise mechanical agitation, independent vessel temperature monitoring, and robust environmental control to minimize experimental variability—critical for bioequivalence (BE) studies, generic product development, and Quality-by-Design (QbD) workflows. Its modular architecture allows seamless integration with analytical instrumentation, enabling end-to-end dissolution–analysis workflows without manual intervention.

Key Features

• Eight independently controlled dissolution vessels with dual-lid configuration to suppress solvent evaporation and maintain headspace consistency across extended test durations.
• High-precision motor drive delivering rotation speeds from 25 to 250 rpm with ±1 rpm accuracy; paddle wobble ≤0.5 mm and basket wobble ≤1.0 mm ensure hydrodynamic uniformity per USP mechanical calibration requirements.
• Individual Pt100 temperature probes immersed directly in each vessel, providing real-time, vessel-specific temperature feedback with ±0.1°C accuracy across a 20–60°C operating range.
• Integrated water bath with 18 L capacity, ambient-to-45°C controllability, and 0.1°C resolution—optimized for thermal stability during multi-hour dissolution profiles.
• Modular expansion interface supporting optional automated sampling modules (e.g., LOGAN AS-8 or AS-12), UV/Vis spectrophotometers, HPLC autosamplers, fiber-optic probes, dilution stations, and membrane permeation systems.
• Configurable multi-speed zoning: up to four independent speed zones across the eight vessels, enabling parallel evaluation of formulation variants under differentiated hydrodynamic conditions.

Sample Compatibility & Compliance

The UDT-812A-8 accommodates solid oral dosage forms—including immediate- and extended-release tablets, capsules, suspensions, transdermal patches, and hydrogels—as well as semi-solid and implantable dosage forms when paired with appropriate accessories (e.g., sinker baskets, disc holders, or flow-through cell adapters). It supports method adaptation to USP Apparatus 3 (reciprocating cylinder), Apparatus 4 (flow-through cell), small-volume cup methods, rotating disk, and paddle-over-disc configurations via certified accessory kits. All mechanical performance verification (MPV) parameters comply with USP and . System design facilitates audit readiness for FDA 21 CFR Part 11, EU Annex 11, and GLP/GMP environments through traceable calibration logs, electronic signatures (when paired with compliant software), and full audit trail capability.

Software & Data Management

When operated with LOGAN’s WinDiss software (v5.0+), the UDT-812A-8 provides full protocol definition, real-time monitoring of vessel temperature, rotation speed, and sampling events, plus automated data export to CSV, Excel, or LIMS-compatible formats. The software supports multi-level user access control, electronic signature enforcement, and secure audit trails meeting FDA 21 CFR Part 11 requirements. Raw sensor data—including individual vessel temperature drift, motor current load, and lid-open detection—is timestamped and retained for retrospective analysis. Integration APIs allow bidirectional communication with third-party chromatography data systems (CDS) and laboratory information management systems (LIMS), ensuring data integrity throughout the dissolution–analysis chain.

Applications

• Comparative dissolution profiling of reference-listed drugs (RLDs) and generic candidates for ANDA submissions.
• Early-stage formulation screening under discriminatory conditions (e.g., pH-shift, surfactant gradients, or variable agitation).
• Dissolution–permeation correlation studies using integrated side-by-side diffusion cells or PAMPA membranes to assess absorption potential.
• Stability-indicating dissolution method development for degradant monitoring in forced degradation studies.
• Supporting Quality Target Product Profiles (QTPPs) and defining meaningful dissolution specifications aligned with clinical performance.
• Regulatory submission packages requiring full MPV documentation, system suitability records, and raw instrument metadata.

FAQ

Does the UDT-812A-8 meet USP mechanical calibration standards?

Yes—the system undergoes factory verification per USP for rotational speed accuracy, vessel centering, wobble, and temperature uniformity. Calibration certificates and MPV checklists are provided with each unit.
Can it operate unattended for 24+ hours?

Yes, with optional automated sampling and environmental monitoring modules, the system supports fully unattended operation across extended dissolution profiles, including pulsatile and multi-phase release testing.
Is it compatible with non-USP dissolution apparatus types?

Yes—via validated accessory kits, the platform supports Apparatus 3 (reciprocating cylinder), Apparatus 4 (flow-through cell), miniaturized cup methods, and rotating disk configurations per ICH Q5C and Q5D guidance.
How is data integrity ensured during long-term studies?

All critical parameters are logged at ≥1 Hz resolution with hardware-timestamped entries. WinDiss enforces role-based access, electronic signatures, and immutable audit trails compliant with 21 CFR Part 11 Subpart C.
What maintenance is required to sustain compliance?

Annual mechanical verification and temperature probe calibration are recommended. LOGAN provides certified service engineers and NIST-traceable calibration tools to support ongoing GxP compliance.