Acona 7000 APS PFAT5 Large Particle Analyzer
| Brand | Acona |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | OEM Manufacturer |
| Regional Category | Domestic (China) |
| Model | Acona 7000 APS |
| Instrument Type | Optical Single-Particle Counter |
| Detection Principle | SPOS (Single Particle Optical Sensing) with Dual-Mode Extinction + Scattering |
| Dynamic Range | 0.5 – 400 µm |
| Resolution | 0.01 µm (1024-channel binning) |
| Sensitivity | 10 ppt (particles per trillion) |
| Dilution Capability | Auto-dilution up to 10¹¹ #/mL original concentration |
| Regulatory Compliance | FDA 21 CFR Part 11, USP <729>, Chinese Pharmacopoeia 2020 Edition |
Overview
The Acona 7000 APS PFAT5 Large Particle Analyzer is an advanced optical single-particle counter engineered for high-fidelity, quantitative analysis of large particulates in sensitive liquid formulations. It operates on the SPOS (Single Particle Optical Sensing) principle—where each particle passing through a precisely defined sensing zone is individually detected and sized via dual-mode optical interrogation: simultaneous light extinction (for volumetric equivalence) and light scattering (for enhanced sub-micron sensitivity). This hybrid detection architecture enables rigorous compliance with pharmacopeial standards—including USP for fat emulsions and CP 2020 Annex IX Q—for PFAT5 (Percent Fat Above Five micrometers) quantification. Unlike ensemble-averaging techniques such as laser diffraction, the Acona 7000 APS delivers true number-weighted and volume-weighted particle size distributions (PSD), essential for risk-based quality control in injectables, CMP slurries, and functional colloids.
Key Features
- Patented Two-Step Automatic Dilution System: Eliminates manual dilution errors by enabling direct analysis of undiluted samples up to 10¹¹ particles per mL. The system dynamically adjusts dilution ratio in real time and applies precise correction factors during data reconstruction—ensuring traceable, repeatable concentration reporting.
- Dual-Physics LE400 Sensor: Integrates extinction and scattering detection within a single flow cell, extending reliable sizing from 0.5 µm to 400 µm without mode switching or calibration gaps. This eliminates interpolation artifacts common in multi-instrument workflows.
- 1024-Channel High-Resolution Binning: Provides 0.01 µm bin width resolution—over 64× finer than conventional 16-channel instruments. Enables unambiguous deconvolution of multimodal distributions (e.g., distinguishing 0.8 µm, 2 µm, and 5 µm reference standards as discrete peaks).
- 10 ppt Sensitivity for LPC Detection: Detects trace-level large particle contaminants at concentrations as low as 10 particles per trillion—approximately 6000× more sensitive than laser diffraction for >2 µm particles—critical for monitoring CMP slurry degradation or lipid emulsion instability.
- Regulatory-Ready Software Architecture: Fully compliant with FDA 21 CFR Part 11, including role-based access control, immutable audit trails, electronic signatures, automated Pass/Fail reporting, and LIMS-integrated database backup.
Sample Compatibility & Compliance
The Acona 7000 APS accommodates viscous, opaque, and biologically active matrices—including lipid emulsions (e.g., Intralipid®), liposomal suspensions, silica and alumina CMP slurries, photoresists, protein aggregates, and conductive inks—without requiring pre-filtration or centrifugation. Its non-destructive optical sensing preserves sample integrity for downstream assays. Method validation support includes built-in USP calculation engines for PFAT5, automatic thresholding for >5 µm volume fraction, and configurable reporting templates aligned with ICH Q5C, ISO 21501-4, and ASTM E2456. All firmware and software updates are version-controlled and documented per GMP change control requirements.
Software & Data Management
The embedded Acona AnalyzeSuite™ v4.x platform provides full lifecycle data governance: user authentication with hierarchical permissions (e.g., operator, supervisor, administrator), timestamped audit logs capturing every login, parameter modification, calibration event, and report export, and cryptographic hashing of raw sensor files to prevent tampering. Reports include raw count histograms, cumulative distribution curves, statistical summaries (Dv10/Dv50/Dv90), and batch-comparison overlays. Data export supports CSV, PDF/A-2, and XML formats compatible with enterprise LIMS and ELN systems. Optional 21 CFR Part 11 validation package includes IQ/OQ documentation, electronic signature workflow configuration, and periodic requalification protocols.
Applications
- Pharmaceutical Quality Control: Quantitative PFAT5 assessment of parenteral fat emulsions per USP ; stability trending of liposomal drug products; detection of silicone oil droplets or glass particulates in prefilled syringes.
- Semiconductor Process Monitoring: Real-time LPC tracking in CMP slurries during recirculation; evaluation of abrasive agglomeration kinetics under shear stress; acid-dependent stability screening of Al₂O₃ polishing formulations.
- Advanced Materials R&D: Characterization of pigment dispersion in inkjet inks; sizing of aggregated monoclonal antibodies; quantification of residual catalyst particles in battery electrolytes.
- Academic & Regulatory Research: Method development for ISO 13322-2 validation; inter-laboratory comparison studies; reference material certification for large-particle standards.
FAQ
Does the Acona 7000 APS require daily recalibration?
No—sensor alignment and gain calibration are performed semi-annually using NIST-traceable polystyrene latex standards. Daily verification uses a built-in reference pulse generator to confirm signal integrity and baseline stability.
Can it analyze undiluted blood products or cell culture supernatants?
It is not designed for whole blood or unclarified bioreactor harvests due to cellular debris interference; however, clarified supernatants, sterile-filtered formulations, and ultracentrifuged fractions are fully supported.
How is data integrity ensured during long-duration runs (e.g., 24-h stability studies)?
The system employs cyclic memory buffering with auto-save intervals ≤30 seconds, redundant SSD storage, and checksum-verified file writes—preventing data loss during power interruption or network latency.
Is method transfer possible between different Acona 7000 APS units?
Yes—method files (.acm) encapsulate all optical parameters, dilution logic, binning schemes, and pass/fail criteria, enabling identical execution across instruments without revalidation.
What maintenance is required beyond routine cleaning of the fluidic path?
Annual preventive maintenance includes LED intensity profiling, flow cell inspection, pump tubing replacement, and sensor dark-current characterization—all documented in the integrated service log.
