Anton Paar Brabender Aquatrac-V Selective Moisture Analyzer

Overview

The Anton Paar Brabender Aquatrac-V Selective Moisture Analyzer is a dedicated laboratory instrument engineered for the precise, selective quantification of residual moisture in hygroscopic polymer materials—specifically designed to meet the stringent requirements of DIN EN ISO 15512:2019. Unlike non-selective techniques such as Karl Fischer titration or near-infrared (NIR) spectroscopy, the Aquatrac-V employs the calcium hydride (CaH₂) reaction method: under controlled vacuum and elevated temperature, liberated water vapor reacts stoichiometrically with calcium hydride to produce hydrogen gas. The resulting pressure increase is measured with high-resolution capacitance manometry and converted into absolute water mass via the reaction equation (CaH₂ + 2H₂O → Ca(OH)₂ + 2H₂). This direct gravimetric principle eliminates dependence on calibration curves, reference standards, or empirical models—ensuring traceable, method-based accuracy without drift or revalidation cycles.

Key Features

• True selectivity for water: Unaffected by solvents, volatiles, or decomposition products commonly present in thermoplastic resins (e.g., PET, PA6, PC, PBT).
• 0.0001% H₂O resolution (1 ppm): Achieved through ultra-stable vacuum control and high-sensitivity pressure transduction.
• Integrated sample drying module: Simultaneously performs moisture analysis and prepares ASTM D1238 / ISO 1133-compliant dry samples for melt flow rate (MFR) testing—eliminating separate drying ovens and associated handling errors.
• Automated, programmable heating profiles: Precise temperature ramping and hold stages ensure complete water release without polymer degradation.
• Robust vacuum architecture: Dual-stage pumping system with integrated cold trap prevents condensable interference and ensures long-term pressure stability.
• Modular reagent cartridge design: Pre-filled, sealed CaH₂ cartridges minimize operator exposure and guarantee consistent reactivity batch-to-batch.

Sample Compatibility & Compliance

The Aquatrac-V is validated for use with granular, pelletized, and flake-form thermoplastics—including polyamides (PA6, PA66), polyesters (PET, PBT), polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS), and polyacetal (POM). It excludes interference from alcohols, acids, or residual monomers due to the chemical specificity of the CaH₂ reaction. As the only commercially available system fully aligned with DIN EN ISO 15512:2019, it satisfies regulatory expectations for quality control in medical-grade polymer manufacturing, automotive component supply chains, and electronics encapsulation. Its operational protocol supports GLP and GMP environments through configurable user roles, password-protected method editing, and full audit trail logging—including timestamped parameter changes, result exports, and reagent lot tracking.

Software & Data Management

Aquatrac Control Software provides a secure, intuitive interface for method development, real-time reaction monitoring, and automated report generation. All measurement data—including raw pressure-time curves, calculated moisture values, and system diagnostics—are stored in an encrypted SQLite database with immutable timestamps. The software supports 21 CFR Part 11 compliance via electronic signatures, role-based permissions, and tamper-evident audit trails. Export formats include CSV, PDF, and XML for seamless integration into enterprise systems such as LIMS (e.g., LabWare, Thermo Fisher SampleManager) and ERP platforms (e.g., SAP QM, Oracle Quality). Remote access is enabled via secure HTTPS, allowing supervisors to review QC batches from offsite locations without compromising data integrity.

Applications

• Pre-MFR sample conditioning: Ensures moisture content is below specification limits prior to melt index testing—reducing inter-laboratory variability and test failures.
• Raw material release testing: Verifies supplier-provided moisture specifications for incoming polymer lots in accordance with ISO 10350-1 and IEC 60296.
• Process optimization: Monitors moisture trends across extrusion, injection molding, or fiber spinning lines to correlate with mechanical property deviations (e.g., hydrolytic degradation in PET).
• Stability studies: Quantifies moisture uptake kinetics in packaging films or barrier-layer composites under controlled humidity conditions.
• Regulatory submissions: Generates auditable, standard-compliant data packages for FDA premarket notifications (510(k)), CE marking technical files, and ISO 13485-certified quality systems.

FAQ

Does the Aquatrac-V require routine calibration?
No. As a primary measurement method based on stoichiometric gas evolution, it does not rely on calibration standards. System verification is performed using certified water standards (e.g., sodium tartrate dihydrate) at user-defined intervals.
Can it analyze filled or reinforced polymers?
Yes—glass-fiber, mineral-, or carbon-filled grades are compatible, provided the filler does not react with CaH₂ or impede water diffusion. Method validation per ISO 17987 is recommended for novel formulations.
How is data security ensured during network integration?
All communications use TLS 1.2+ encryption; local database backups are AES-256 encrypted; and LIMS/ERP interfaces operate via authenticated API tokens—not direct database access.
What maintenance is required for long-term reliability?
Annual vacuum pump oil replacement, biannual manometer zero calibration, and periodic cold trap cleaning—documented in the built-in service log with automated reminders.
Is training included with installation?
Yes: A two-day on-site commissioning and operator training session covers method setup, troubleshooting, compliance documentation, and software configuration—delivered by Anton Paar Brabender-certified application specialists.