LOGAN SYSTEM 850DL 8-Position Automated Dissolution Sampling System

Overview

The LOGAN SYSTEM 850DL is an online, modular 8-position automated dissolution sampling system engineered for regulatory-compliant, high-reproducibility dissolution testing in pharmaceutical development and quality control laboratories. It operates on the principles of USP Apparatus 1 (basket) and Apparatus 2 (paddle), delivering precise hydrodynamic conditions essential for evaluating drug release kinetics under physiologically relevant parameters. Designed to meet the rigorous demands of ANDA submissions, biowaiver studies, and comparative dissolution profiling, the SYSTEM 850DL integrates real-time temperature monitoring, programmable sampling sequences, and closed-loop fluid handling—ensuring minimal operator intervention and maximal data integrity throughout extended dissolution runs (up to 24+ hours).

Key Features

• Modular architecture comprising UDT-812A 8-position dissolution apparatus, SCR-DL sample collector, SYP-8L-10 mL precision syringe pump, and DSC-800 centralized system controller—enabling flexible configuration and field-upgradable functionality.
• Dual-stage filtration integrated into each sampling line, minimizing particulate carryover and ensuring compatibility with downstream analytical instrumentation including UV-Vis spectrophotometers, HPLC systems, and fiber-optic probes.
• High-accuracy syringe pump (±1% volumetric repeatability) with programmable aspiration/dispense cycles, eliminating manual sampling variability and supporting volume-controlled sampling (e.g., 5–10 mL per timepoint) with automatic medium replenishment.
• Independent temperature monitoring via eight embedded Pt100 sensors—one per vessel—with real-time display and deviation logging; combined with dual-lid vessel covers and sealed water bath (18 L capacity), evaporation loss is maintained below 0.5% per hour at 37°C.
• FDA 21 CFR Part 11–compliant software platform featuring electronic signatures, audit trail with immutable timestamped records, and three-tier user permission management (Administrator, Supervisor, Operator).

Sample Compatibility & Compliance

The SYSTEM 850DL accommodates solid oral dosage forms—including immediate-release and modified-release tablets, capsules, suspensions, transdermal patches, and hydrogels—across standard USP dissolution methods. Optional accessories enable method flexibility: small-volume vessels (mini-basket/mini-paddle), flow-through cells (Apparatus 4), rotating cylinder (Apparatus 3), and paddle-over-disc configurations. All mechanical components comply with USP , , and specifications for rotational accuracy, wobble tolerance (paddle ≤0.5 mm, basket ≤1.0 mm), and temperature uniformity (±0.1°C). The system supports GLP/GMP-aligned validation protocols, including IQ/OQ/PQ documentation templates and calibration traceability to NIST-certified standards.

Software & Data Management

Control and data acquisition are managed via LOGAN’s proprietary DSC-800 software, a Windows-based application supporting multi-user environments and network deployment. The software provides synchronized control of dissolution parameters (temperature, rotation, sampling schedule), real-time graphing of cumulative dissolution profiles, and automated export to CSV, PDF, or XML formats compatible with statistical analysis tools (e.g., WinNonlin, JMP). Audit trails record all critical events—including parameter changes, sample triggers, error alerts, and user logins—with SHA-256 hashing for tamper detection. Remote monitoring is enabled via secure HTTPS interface; optional mobile application access allows status verification and alarm notifications without compromising firewall integrity.

Applications

• Comparative dissolution testing for generic drug bioequivalence assessments per FDA and EMA guidance.
• Formulation optimization during preclinical and clinical development stages.
• Stability-indicating dissolution method development and validation.
• Integration with permeation systems (e.g., Franz diffusion cells) to generate simultaneous dissolution-permeation (D/P) profiles for mechanistic absorption modeling.
• Automated linkage to UV, HPLC, or fiber-optic spectroscopy platforms for real-time quantification—reducing post-run processing time by >60% versus manual workflows.
• Support for Quality-by-Design (QbD) initiatives through design space mapping of critical process parameters (CPPs) such as agitation rate, temperature, and sink condition.

FAQ

Does the SYSTEM 850DL support USP Apparatus 4 (flow-through cell)?

Yes—when equipped with the optional FT-8 flow-through cell module and corresponding pump manifold, the system complies with USP and enables continuous-flow dissolution testing for low-solubility compounds.
Can temperature be monitored independently for each vessel during a run?

Yes—eight calibrated Pt100 probes provide real-time, vessel-specific temperature feedback with logging resolution of 0.01°C and alarm thresholds configurable per vessel.
Is the system compatible with third-party chromatography data systems (CDS)?

Yes—via ASCII/CSV export or OPC UA server integration, raw dissolution timepoints and metadata can be ingested directly into Empower, Chromeleon, or OpenLab CDS without manual reformatting.
What validation documentation is provided?

LOGAN supplies comprehensive IQ/OQ protocols, factory calibration certificates (NIST-traceable), and a Part 11 readiness checklist covering electronic records, signature implementation, and audit trail retention policies.
How is media replenishment handled during long-duration tests?

The SYP-8L pump executes precise, temperature-matched medium replacement synchronized with each sampling event—maintaining constant volume and sink conditions across all 8 vessels without cross-contamination.