Logan SYSTEM 850DL-12 Automated Dissolution Sampling System

Overview

The Logan SYSTEM 850DL-12 Automated Dissolution Sampling System is a fully integrated, modular platform engineered for precision-controlled, regulatory-compliant dissolution testing in pharmaceutical development, quality control, and stability studies. Built upon the USP-defined hydrodynamic principles of basket (USP Apparatus 1), paddle (USP Apparatus 2), flow-through cell (USP Apparatus 5), and reciprocating disk (USP Apparatus 6) methods, the system delivers high reproducibility in drug release profiling across solid oral dosage forms—including immediate- and extended-release tablets, capsules, orally disintegrating tablets (ODTs), and transdermal patches. Its core architecture centers on real-time synchronization between vessel temperature regulation, rotational motion control, and timed, volumetrically accurate sampling—ensuring minimal perturbation to the dissolution medium and strict adherence to pharmacopeial requirements for sink condition maintenance and hydrodynamic consistency.

Key Features

• Modular, scalable design supporting either 8- or 12-vessel configurations via the UDT-812A-12 dissolution apparatus—enabling parallel method development or batch release testing.
• Precise thermal management with an internal recirculating heater and dual-point platinum RTD sensors, maintaining bath temperature within ±0.1 °C across all vessels throughout the test duration.
• High-stability drive system delivering rotation speeds from 25 to 250 rpm with ±0.1 rpm accuracy, calibrated per USP mechanical verification protocols.
• Automated dosing tray for synchronized, zero-delay tablet/capsule introduction—eliminating inter-vessel timing variance and improving assay start-time fidelity.
• 12-channel SYP-6L syringe pump with programmable aspiration, line rinse, and return-to-vessel functionality—ensuring zero sample waste and eliminating carryover risk through full-line flushing prior to each withdrawal.
• DSC-800D dual-system controller enabling independent parameter programming for two 850DL-12 units, including time-scheduled sampling points, volume per draw (0.1–10 mL), and real-time logging of speed, temperature, and event timestamps.

Sample Compatibility & Compliance

The SYSTEM 850DL-12 supports dissolution testing of diverse dosage forms under current pharmacopeial standards: USP (dissolution), (transdermal systems), (osmotic pumps), (modified-release products), and (drug release from implants). It accommodates standard 1000 mL dissolution vessels, as well as custom geometries required for USP Apparatus 5 and 6. All hardware components—including tubing materials (pharmaceutical-grade PTFE and stainless steel), filter housings (0.45 µm or 0.22 µm membrane-compatible), and sample collection trays—are compliant with ISO 9001 manufacturing practices and suitable for GMP environments. The system architecture supports audit trail generation, electronic signature capability, and user access level management—facilitating alignment with FDA 21 CFR Part 11 and EU Annex 11 requirements when deployed with validated software configurations.

Software & Data Management

The DSC-800D controller provides an intuitive, menu-driven interface for method creation, execution, and post-run review without requiring external PC dependency. Each run generates a timestamped, tamper-evident report containing vessel ID, method parameters (rotation speed, temperature setpoint, sampling intervals), actual measured values (real-time bath temperature, motor RPM), and per-vessel sample metadata (withdrawal time, volume, rinse cycle status). Data export is supported via USB to CSV format for integration into LIMS or statistical analysis platforms (e.g., JMP, Minitab). Optional firmware upgrades enable automated data archiving to network drives and configurable alarm thresholds for out-of-specification events (e.g., temperature drift >±0.2 °C, speed deviation >±1 rpm).

Applications

• Comparative dissolution profiling for generic product bioequivalence studies.
• Stability-indicating release testing across accelerated and long-term storage conditions.
• Formulation optimization of controlled-release matrices, enteric-coated granules, and nanosuspension-based tablets.
• Quality-by-Design (QbD) parameter mapping for critical process attributes affecting dissolution kinetics.
• Regulatory submission support—including ANDA, NDA, and CMC documentation packages requiring full traceability of dissolution methodology and raw data.
• Transdermal patch release testing per USP , including static and dynamic diffusion cell configurations.

FAQ

Does the SYSTEM 850DL-12 support USP Apparatus 6 (reciprocating disk)?

Yes—the UDT-812A-12 base unit is mechanically configurable for USP Apparatus 6 operation with optional reciprocating drive modules and custom vessel holders.
Can sampling be performed without discarding any medium?

Yes—each sampling cycle includes a pre-aspiration line flush followed by return of the rinse volume to the same vessel, preserving sink conditions and eliminating sample loss.
Is temperature monitoring performed per vessel or averaged across the bath?

Two independent platinum RTD sensors continuously monitor temperature at distinct spatial locations within the water bath; readings are logged individually per time point, not averaged.
What validation documentation is provided with the system?

Factory calibration certificates for temperature and rotation sensors, IQ/OQ protocol templates aligned with ASTM E2503 and USP , and mechanical verification checklists per USP are included.
Can the DSC-800D controller manage non-Logan dissolution apparatuses?

No—the DSC-800D is designed exclusively for bidirectional communication with Logan UDT-series dissolution units and associated SYP/SCR modules.