Hiranuma MOIVO-A19 Volumetric Karl Fischer Moisture Analyzer

Overview

The Hiranuma MOIVO-A19 is a fully automated volumetric Karl Fischer (KF) moisture analyzer engineered for high reproducibility, regulatory traceability, and routine laboratory efficiency. It implements the classical volumetric KF titration principle—where iodine generated electrochemically or delivered via standardized KF reagent reacts stoichiometrically with water in the sample—and quantifies moisture content based on titrant consumption calibrated against certified water standards. Unlike coulometric systems optimized for trace-level analysis (<100 ppm), the MOIVO-A19 excels across the full dynamic range from 10 ppm to 100% water content, making it suitable for pharmaceutical actives, polymers, solvents, oils, and hygroscopic excipients. Its architecture integrates precision fluidics, temperature-stable electrode sensing, and real-time endpoint detection via bipotentiometric (dual-platinum) electrode monitoring—ensuring robust endpoint resolution even in challenging matrices such as viscous resins or low-conductivity solvents.

Key Features

• 8.4-inch Full-Color Touch Interface: High-resolution TFT display with intuitive icon-driven navigation; supports alphanumeric input, customizable method templates, and on-screen real-time titration curves.
• 16-Position Ergonomic Tilt Adjustment: Mechanically locked LCD mount enables personalized viewing angle optimization—critical for extended operation under laminar flow hoods or multi-user lab environments.
• Built-in Thermal Printer (58 mm): Direct hardcopy output with timestamp, sample ID, method name, result, and statistical summary; paper loading requires no tools or alignment.
• Dual-Mode Data Export: Local storage via USB mass storage device (FAT32 formatted); remote access and visualization through embedded web server over LAN—no proprietary client required.
• Role-Based User Authentication: Up to 10 user profiles with configurable permissions (e.g., operator, supervisor, administrator); password enforcement prevents unauthorized modification of calibration parameters or method settings.
• Tri-Color Status Lamp + Dual-Color LED: Visual status indication (Ready/Running/Error) visible from >3 meters; eliminates need to approach instrument for operational verification.
• Tool-Free Burette Head Exchange: Single-hand slide-release mechanism minimizes downtime during reagent changeover or maintenance; compatible with standard 10 mL and 20 mL KF burettes.
• Economical Reagent Management: Programmable Auto-Purge (1–99 cycles) reduces dead-volume carryover; integrated reagent return circuit recirculates unused titrant back to reservoir—extending reagent shelf life and lowering cost per analysis.
• 40-Step Motorized Stirrer Control: Precise agitation optimization across sample types; LED bar graph (10 segments × 4 steps each) provides immediate visual feedback on selected speed—critical for endpoint stability in heterogeneous or precipitating samples.

Sample Compatibility & Compliance

The MOIVO-A19 accommodates solid, liquid, and gaseous samples via optional accessories—including oven samplers (for volatiles), gas diffusion cells (for dissolved moisture in gases), and homogenizer adapters (for pastes or granules). All wetted parts are chemically resistant to common KF reagents (imidazole-based, methanol-free, and chloroform-free formulations). The system meets essential requirements for regulated environments: audit trail generation (with user ID, timestamp, parameter changes), electronic signature support (when used with validated third-party LIMS or HPLC data systems), and compatibility with ISO 8573-3 (compressed air moisture), ASTM D6304 (petroleum products), USP , and EP 2.5.12. When deployed with documented IQ/OQ protocols and configured for 21 CFR Part 11 compliance (via external validated software), it satisfies GMP/GLP documentation integrity expectations for QC release testing.

Software & Data Management

Raw titration data—including potential vs. volume, derivative curves, equivalence point calculation, drift correction, and blank subtraction—is stored in CSV and proprietary binary formats. Optional PC software (sold separately) enables post-acquisition reprocessing, statistical batch reporting (mean, SD, RSD, confidence intervals), and export to Excel or LIMS via ODBC. LAN connectivity permits browser-based monitoring: technicians can view live status, download recent results, or trigger manual start/stop commands from any networked workstation—reducing foot traffic in controlled areas. All data files include embedded metadata (operator, date/time, method version, instrument serial number) to support ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate).

Applications

This analyzer is routinely deployed in pharmaceutical quality control labs for residual solvent analysis in APIs (per ICH Q3C), moisture content verification in lyophilized powders (USP ), and excipient qualification. In materials science, it quantifies bound water in lithium-ion battery cathode precursors and polymer pellets prior to extrusion. Petrochemical users apply it to assess water contamination in jet fuel (ASTM D6304), transformer oils (IEC 60814), and biodiesel feedstocks. Food laboratories use it for moisture specification in dairy powders, starches, and roasted coffee—where rapid turnaround and repeatability across shifts are essential.

FAQ

What is the difference between volumetric and coulometric Karl Fischer titration?
Volumetric KF measures water by consuming a standardized iodine-containing titrant; it is optimal for samples with >100 ppm water. Coulometric KF generates iodine electrolytically and is preferred for sub-ppm measurements.
Can the MOIVO-A19 be integrated into a LIMS environment?
Yes—via CSV export or ODBC-compliant PC software; raw data includes all metadata required for LIMS ingestion and audit trail linkage.
Is method validation support available?
Hiranuma provides application notes and IQ/OQ templates; full PQ validation must be performed by the end user per local regulatory requirements.
Does the instrument support non-aqueous KF reagents?
Yes—it is compatible with all major commercial volumetric KF reagents, including aldehyde-free, pyridine-free, and low-toxicity formulations.
How often does the burette tip require replacement?
Under normal use (≤500 titrations/month), the PTFE-coated tip lasts ≥12 months; wear indicators appear as increased baseline drift or inconsistent endpoint detection.