PULUODY PLD-MPCS2.0A Insoluble Particle Microscopic Imaging & Counting System

Overview

The PULUODY PLD-MPCS2.0A Insoluble Particle Microscopic Imaging & Counting System is a fully integrated, regulatory-compliant particle analysis platform engineered for pharmaceutical quality control and industrial fluid cleanliness assessment. It implements the microscopic imaging method—defined as Method 2 in Chinese Pharmacopoeia (ChP) Appendix 0903 “Insoluble Particle Test”—to deliver morphologically resolved, quantitative particle data from membrane-filtered samples. Unlike light-obscuration (light-blockage) or laser diffraction techniques, this system captures high-fidelity optical images of individual particles retained on filter membranes, enabling simultaneous measurement of size, shape, aspect ratio, circularity, and spatial distribution across a broad dynamic range (1–500 µm). Its core architecture integrates a precision optical microscope, a calibrated 3-megapixel digital CCD camera, motorized XY stage with auto-scanning capability, RS232/USB interface, and proprietary image analysis software compliant with GxP data integrity principles. The system is designed to support routine QC release testing, root-cause investigation of particulate contamination, and process validation in sterile manufacturing environments.

Key Features

• Regulatory-aligned workflow: Fully supports ChP 2020, USP , , EP 8.0, JP 16, ISO 21501-4, ISO 21510, and GB/T 11446.9–2013 test protocols
• Wide analytical range: Validated detection from 1 µm to 500 µm with 0.1 µm calibration resolution and ±3% typical accuracy (ChP 2020 reference)
• Automated membrane scanning: Motorized stage enables seamless tile-based stitching of full-filter images; eliminates manual field-of-view overlap errors
• Morphology-aware analysis: Computes particle length, width, aspect ratio, circularity, convexity, and Feret diameters—critical for distinguishing fiber-like vs. spherical contaminants
• GxP-ready software: Role-based user management, electronic signatures, audit trail (21 CFR Part 11 compliant), report templates pre-configured for injectables, IV bags, medical devices, and hydraulic fluids
• High-reproducibility imaging: Manual focus and adjustable illumination intensity ensure optimal contrast for low-refractive-index particles (e.g., silicone, cellulose, polymeric debris)
• Validation-ready design: Includes traceable calibration standards, system suitability checks, and documentation packages aligned with ISO/IEC 17025 and ASTM E2454

Sample Compatibility & Compliance

The PLD-MPCS2.0A accepts standard 25 mm or 47 mm mixed-cellulose ester (MCE) or polycarbonate membrane filters post-sampling via vacuum filtration. It is validated for aqueous and non-aqueous liquids including parenteral solutions (large-volume infusions, small-volume injections), ophthalmic preparations, dialysis fluids, electronic-grade water (UPW), lubricants, hydraulic oils, aviation fuels, and process coolants. All analysis parameters—including minimum detectable size, counting threshold, and classification logic—can be configured per pharmacopoeial monograph or internal SOP. The system meets requirements for sterility testing support, filter integrity verification, and medical device extractables/leachables screening under ISO 10993-12. Full compliance documentation includes certificates of conformance, metrological traceability to NIM (National Institute of Metrology, China), and third-party verification reports from Northwest National Metrology Testing Center.

Software & Data Management

The embedded PULUODY ParticleVision™ v2.0 software operates on Windows OS (Windows 10/11 recommended) and provides complete lifecycle data control. It features automated image acquisition, real-time particle segmentation (93% segmentation success rate, and customizable classification rules based on ISO 4406, NAS 1638, or custom binning schemes. Raw images, metadata (date/time, operator ID, filter ID, magnification), and numerical results are stored in encrypted SQLite databases with immutable audit trails. Export formats include PDF (GMP-compliant reports), CSV (for statistical process control), TIFF (lossless archival), and XML (LIMS integration). Software validation packages include IQ/OQ/PQ protocols, change control logs, and periodic requalification checklists.

Applications

• Pharmaceutical QC: Final container testing of injectables per ChP 0903, USP , and EP 2.9.19
• Medical device evaluation: Particulate shedding from syringes, IV sets, catheters, and implants (per GB 8368 and ISO 8536-4)
• Fluid cleanliness monitoring: Hydraulic oil (ISO 4406), turbine oil (ASTM D6786), fuel (ASTM D2276), and semiconductor process chemicals
• Research & development: Morphological fingerprinting of degradation products, excipient interactions, and filter clogging mechanisms
• Environmental & industrial hygiene: Analysis of suspended solids in wastewater, boiler feedwater, and cleanroom rinse solutions
• Academic & regulatory labs: Reference method validation, inter-laboratory comparison studies, and training platforms for microscopy-based particle analysis

FAQ

Does the PLD-MPCS2.0A comply with 21 CFR Part 11 for electronic records and signatures?

Yes—the software includes role-based access control, time-stamped audit trails, electronic signature capture, and secure database encryption meeting FDA requirements for regulated environments.
Can the system analyze particles smaller than 1 µm?

The validated lower limit is 1 µm under standard optical configuration (1000× magnification, 0.1 µm scale calibration); sub-micron analysis requires optional phase-contrast or differential interference contrast (DIC) optics and is not covered under pharmacopoeial compliance claims.
Is external calibration required before each test run?

No—system calibration is performed during installation and verified daily using NIST-traceable microsphere standards; software enforces automatic scale validation prior to image acquisition.
How does the system handle particle agglomerates or overlapping particles?

Advanced watershed segmentation and edge-detection algorithms resolve >93% of touching particles; users may manually split or reject ambiguous objects during review mode—fully documented in the audit trail.
What service and support options are available internationally?

PULUODY offers “OIL17 Service Star” contracts including remote diagnostics, annual performance verification, on-site engineer dispatch, and application-specific training delivered in English by certified technical specialists.