Wyatt Technology ASTRA 7 Software for Multi-Angle Light Scattering (MALS) and SEC/GPC Analysis

Overview

ASTRA 7 is the flagship data acquisition, analysis, and reporting software platform developed exclusively by Wyatt Technology Corporation for its suite of light scattering and chromatographic detection systems—including multi-angle light scattering (MALS), dynamic light scattering (DLS), differential refractometry (dRI), UV-Vis absorbance, and differential viscometry (ViscoStar®). Engineered for precision macromolecular characterization, ASTRA 7 implements first-principles physical models grounded in Rayleigh-Gans-Debye light scattering theory, Zimm and Debye formalisms for static light scattering, and cumulant and distribution-based algorithms for dynamic light scattering. It is designed to operate as a central hub in SEC/GPC (size-exclusion chromatography/gel permeation chromatography) workflows, enabling absolute, calibration-free determination of molar mass, root-mean-square radius (R_g), conformational parameters, and branching architecture directly from raw detector signals—without reliance on column calibration standards.

Key Features

• Real-time, synchronized acquisition from up to six detectors (MALS, dRI, UV, ViscoStar®, DLS, and pressure sensors) with sub-second time-stamping and hardware-triggered sampling.
• Automated baseline correction, noise filtering, and angular extrapolation for R_g and second virial coefficient (A₂) calculation using rigorous Zimm and Berry plot methodologies.
• Integrated Mark–Houwink analysis engine that correlates intrinsic viscosity [η] with molar mass to determine polymer conformation (e.g., random coil, rod, sphere) and quantify long-chain branching (LCB) via g′ and g′′ metrics.
• Batch processing capability for high-throughput sample sets, including automated peak identification, integration, and report generation compliant with audit-trail requirements.
• FDA 21 CFR Part 11–ready architecture with electronic signatures, user-role permissions, immutable audit logs, and full traceability of all data transformations and parameter edits.
• Native support for method transfer between major HPLC platforms—Waters Empower™, Agilent OpenLab CDS, and Shimadzu LabSolutions—via standardized .cdf and .u32 file import and vendor-neutral peak table mapping.

Sample Compatibility & Compliance

ASTRA 7 supports aqueous and organic solvent systems across a broad concentration range (typically 0.01–10 mg/mL), accommodating proteins, monoclonal antibodies (mAbs), viral vectors, synthetic polymers, polysaccharides, and nanoparticles. All analytical modules adhere to internationally recognized standards including ISO 13877 (light scattering for particle sizing), ASTM D7985 (SEC-MALS for polymer characterization), and USP (water for pharmaceutical use—applies to buffer compatibility validation). The software’s electronic record structure satisfies GLP and GMP documentation requirements for regulated environments, with configurable retention policies and exportable validation documentation packages (IQ/OQ/PQ templates available upon request).

Software & Data Management

Data files are stored in a proprietary but open-schema binary format (.ast) with embedded metadata (instrument configuration, temperature, flow rate, detector gains, calibration coefficients). All raw and processed data are fully recoverable and reproducible—no lossy compression or irreversible smoothing is applied by default. ASTRA 7 includes a built-in SQL database for project-level organization, customizable report templates (PDF/HTML), and programmatic access via Python API (wyatt-python-sdk) for custom scripting, statistical modeling, and LIMS integration. Export options include tabular data (CSV, Excel), publication-ready vector graphics (SVG, EPS), and annotated chromatograms with overlay capabilities for comparative analysis.

Applications

• Determination of absolute weight-average molar mass (M_w) and polydispersity index (Đ = M_w/M_n) for synthetic polymers without column calibration artifacts.
• Quantification of protein aggregation states (monomer, dimer, higher-order aggregates) and thermal/chemical stability profiling via time-resolved SEC-MALS.
• Structural fingerprinting of glycoproteins and AAV capsids using R_g/M_w conformation plots to distinguish folded vs. denatured or fragmented species.
• Branching analysis of polyolefins and ethylene copolymers via simultaneous [η] and M_w measurement across elution volume.
• Validation of biosimilar comparability through orthogonal, label-free assessment of higher-order structure and size heterogeneity.
• Method development and QC release testing in compliance with ICH Q5E and Q5C guidelines for biopharmaceuticals.

FAQ

Is ASTRA 7 compatible with third-party SEC systems beyond Wyatt detectors?
Yes—ASTRA 7 accepts standard chromatographic data formats (.cdf, .u32, .txt) and supports detector signal alignment via retention time referencing, enabling integration with non-Wyatt MALS or viscometry modules when properly configured.
Does ASTRA 7 support automated system suitability testing (SST)?
Yes—users can define SST criteria (e.g., peak symmetry, resolution, RSD thresholds) within method templates and trigger pass/fail flags during batch processing.
Can ASTRA 7 generate 21 CFR Part 11–compliant audit trails?
Yes—every user action affecting data integrity (parameter change, baseline adjustment, integration boundary edit) is timestamped, attributed, and immutably logged with hash-verified integrity checks.
What level of technical support and validation assistance does Wyatt provide?
Wyatt offers on-site IQ/OQ services, installation qualification protocols, and dedicated application scientists for method transfer, troubleshooting, and regulatory submission support.