AccuSizer 780 A9000 FXnano-SIS Nanoparticle and Subvisible Particle Analyzer

Overview

The AccuSizer 780 A9000 FXnano-SIS is a high-sensitivity, single-particle counting and sizing instrument engineered for quantitative analysis of subvisible and nanoparticulate contaminants in pharmaceutical, biotechnology, semiconductor, and advanced materials applications. It employs Focused Light Obscuration (FLO), a refined variant of Light Obscuration (LO), combined with Single Particle Optical Sensing (SPOS) architecture to deliver direct, real-time particle enumeration and high-fidelity size distribution data across an extended dynamic range—from 0.15 µm to 400 µm. Unlike ensemble-averaging techniques such as laser diffraction or dynamic light scattering, the FXnano-SIS resolves individual particles one-by-one, enabling statistically robust detection of low-abundance, high-risk “tail-end” particles—critical for quality control in parenteral drug products, protein therapeutics, CMP slurries, and cleanroom monitoring. Its dual-sensor configuration (FXnano + LE-series) allows method-specific optimization: the FXnano sensor achieves ultra-low detection thresholds (0.15 µm) at high concentrations (up to 10⁶ particles/mL), while the LE-series provides 512-channel resolution for high-precision histogram generation under lower-concentration conditions (≤10⁴ particles/mL).

Key Features

• Dual-sensor platform: FXnano sensor optimized for nanoscale detection (0.15–10 µm) with enhanced signal-to-noise ratio; LE-series sensor delivering 512-channel size binning for high-resolution population profiling (0.15–400 µm).
• FLO-based optical design: Uses a tightly focused laser beam and high-gain photodetector array to maximize obscuration signal amplitude from submicron particles, improving sensitivity and reproducibility.
• Automated sample handling: Integrated peristaltic pump, programmable dilution module, and self-cleaning fluidics reduce operator variability and support unattended batch analysis.
• Regulatory-ready architecture: Fully compliant with 21 CFR Part 11 requirements—including electronic signatures, audit trail logging, user access controls, and data integrity safeguards—validated for GLP/GMP environments.
• Real-time particle counting: No assumptions about particle shape or refractive index; each pulse event corresponds to a physically resolved particle, ensuring traceable, first-principles quantification.

Sample Compatibility & Compliance

The AccuSizer 780 A9000 FXnano-SIS supports aqueous and non-aqueous suspensions, including monoclonal antibody formulations, liposomal drug carriers, vaccine adjuvants, CMP slurries, and microfluidic process streams. Sample volumes range from 100 µL to 5 mL per run, with optional syringe-pump injection for viscous or low-volume samples. The system meets key international standards for particulate contamination testing: ASTM F2863 (for subvisible particle counting in injectables), USP chapters (Particulate Matter in Injections), (Particulate Matter in Ophthalmic Solutions), and (Subvisible and Visible Particles in Therapeutic Protein Products), as well as ISO 21501-4 (Determination of particle size distribution—Single particle light interaction methods). All calibration protocols follow NIST-traceable polystyrene latex (PSL) reference standards.

Software & Data Management

Control and analysis are performed via PSS’s proprietary AccuSizer Software v5.x, a Windows-based application designed for analytical traceability and workflow efficiency. The software supports customizable SOP-driven acquisition sequences, automated pass/fail evaluation against user-defined specification limits (e.g., USP thresholds), and export of raw pulse data in CSV and HDF5 formats. Built-in reporting modules generate PDF/Excel-compliant reports aligned with regulatory submission requirements, including full audit trails, metadata tagging (operator, timestamp, instrument ID, calibration status), and version-controlled method files. Data encryption, role-based permissions, and backup synchronization ensure long-term archival integrity and compliance readiness.

Applications

• Pharmaceutical QC: Quantitative assessment of subvisible particles in sterile injectables, biosimilars, and mRNA-LNP formulations per USP guidance.
• Bioprocess development: Monitoring aggregation onset during formulation screening, freeze-thaw cycling, and filtration validation.
• Semiconductor manufacturing: Detection of oversized abrasive particles (>0.5 µm) in chemical mechanical planarization (CMP) slurries—where sensitivity exceeds traditional laser diffraction by 3–4 orders of magnitude.
• Medical device cleaning validation: Verification of residual particulate load on implants, stents, and surgical tools post-wash.
• Advanced material characterization: Size distribution profiling of nanocellulose, exosomes, polymeric micelles, and colloidal quantum dots.

FAQ

How does FLO differ from conventional Light Obscuration (LO)?

FLO uses a spatially confined, high-intensity laser beam that increases signal amplitude from submicron particles—enabling reliable detection down to 0.15 µm without hydrodynamic focusing or sheath flow.
Can the system analyze undiluted protein therapeutics?

Yes—via the FXnano sensor’s high-concentration mode (up to 10⁶ particles/mL), though viscosity-dependent flow optimization and optional inline dilution may be required for highly viscous mAb formulations.
Is calibration traceable to national standards?

All calibrations utilize NIST-traceable PSL standards certified per ISO 17025-accredited laboratories; certificate of calibration includes uncertainty budgets and drift verification data.
Does the software support multi-user environments with audit trail?

Yes—AccuSizer Software implements full 21 CFR Part 11 functionality, including electronic signatures, immutable audit logs, and hierarchical user roles (Administrator, Analyst, Reviewer).
What maintenance is required for long-term operational stability?

Routine maintenance includes quarterly optical alignment verification, annual photodetector gain calibration, and semi-annual fluidic path inspection; PSS offers preventive maintenance contracts with remote diagnostics support.