Metrohm 907 Titrando Automatic Potentiometric Titrator

Overview

The Metrohm 907 Titrando is a high-precision, fully automated potentiometric titrator engineered for rigorous compliance with international quality and regulatory standards—including ISO/IEC 17025, USP , ASTM E2087, and FDA 21 CFR Part 11. Built upon Metrohm’s proprietary *IntelliDrive™* intelligent architecture, the system integrates embedded microchips in key components—including the titration unit, electrodes, and measurement cables—to enable real-time device authentication, automatic parameter transfer, and traceable hardware configuration. Its core measurement principle relies on potentiometric detection of electromotive force (EMF) changes across a reference–indicator electrode pair during controlled reagent addition, enabling precise endpoint determination via dynamic (DET), incremental (MET), or preset (SET) titration modes. Designed for laboratory environments requiring audit-ready data integrity, the 907 Titrando supports full GLP/GMP workflows through electronic signatures, user access control, and immutable audit trails.

Key Features

• IntelliDrive™ intelligent hardware ecosystem: All critical modules—Dosino dispensing units, pH/mV/temperature electrodes, and measurement cables—feature embedded memory chips that auto-configure settings and log calibration history.
• Dosino 800 series dispensing units: Patented modular design allowing direct mounting onto reagent bottles of any standard size; transparent housing enables visual bubble detection and valve position monitoring; fully automated rinsing and priming without manual disassembly.
• Multi-channel expansion capability: Accommodates up to two Dosino 800 dispensers, four 801 magnetic stirrers, or four 804 titration stands (with 802 rod stirrers); supports optional 867 pH or 856 conductivity modules via auxiliary interface.
• Real-time electrochemical measurement: Simultaneous acquisition of pH, mV, temperature (via Pt1000 or NTC probe), and current (for amperometric applications); 100 ms sampling interval ensures high-fidelity titration curve resolution.
• Regulatory-compliant operation: Full adherence to FDA 21 CFR Part 11 requirements—including electronic signatures, role-based user permissions, password-protected method editing, and tamper-evident audit logs stored on PCMCIA flash cards.

Sample Compatibility & Compliance

The 907 Titrando is validated for universal titration applications—including acid–base, redox, complexometric, precipitation, and non-aqueous titrations—as well as Karl Fischer coulometric and volumetric water determination (KF mode) and controlled-potential (STAT) electrolysis. It accepts standard ion-selective electrodes (ISEs), glass pH electrodes, redox electrodes, and specialized sensors for chloride, fluoride, silver, and other analytes. Electrical isolation between the first measurement channel and auxiliary interfaces (pH/U/mV/T) eliminates ground-loop interference and ensures signal stability in multi-instrument networks. All firmware and method templates are pre-validated per ICH Q2(R2) guidelines for analytical instrument qualification (AIQ), supporting IQ/OQ/PQ documentation frameworks required under GMP and GLP environments.

Software & Data Management

Controlled via tiamo™ software (v3.5+), the 907 Titrando enables centralized database management, parallel titration scheduling, and networked deployment across LAN or internet-connected labs via LabLink™. tiamo™ provides full 21 CFR Part 11 compliance—including electronic signature capture, biometric or token-based authentication, and version-controlled method archiving. Raw data files (including time-stamped titration curves, derivative plots, and equivalence point evaluations) are stored in vendor-neutral formats (e.g., XML, CSV) and support third-party LIMS integration via ODBC or REST API. Optional PC Control software allows remote operation from Windows-based workstations, while touchscreen interface (90 × 120 mm color LCD) delivers intuitive one-touch method launch and live curve visualization.

Applications

• Pharmaceutical QC: Quantification of active pharmaceutical ingredients (APIs), residual solvents, and moisture content per USP and Ph. Eur. 2.5.12.
• Food & Beverage: Titrimetric analysis of acidity (TA), salt content, vitamin C (ascorbic acid), and preservatives (e.g., sulfites).
• Environmental Testing: Determination of chloride, cyanide, hardness (Ca²⁺/Mg²⁺), and free chlorine in wastewater and drinking water per EPA methods 310.1 and 365.2.
• Chemical Manufacturing: Batch release testing of catalysts, surfactants, and polymerization inhibitors using redox and complexometric endpoints.
• Academic Research: Method development for novel ISE-based assays, kinetic titrations, and multi-step potentiometric back-titrations.

FAQ

Does the 907 Titrando support Karl Fischer titration?
Yes—it natively supports both volumetric and coulometric KF water determination using dedicated 803 KF titration stands and compatible reagents.
Can multiple titrations be run in parallel?
Yes—tiamo™ software enables synchronized execution of up to four independent titration sequences across connected 907 units or integrated sample processors.
Is temperature compensation automatic during pH measurements?
Yes—integrated Pt1000 or NTC temperature probes provide real-time compensation; calibration and drift monitoring are logged automatically in GLP-compliant reports.
How is data integrity ensured for regulatory submissions?
All raw data, metadata, and audit trails are cryptographically signed and stored on removable PCMCIA cards with write-protection; tiamo™ enforces mandatory electronic signatures for result approval and method modification.
What electrode types are auto-recognized by the IntelliDrive™ system?
Metrohm Smart Electrodes—including pH, redox, ion-selective, and KF-specific sensors—are equipped with RFID tags enabling plug-and-play recognition, calibration history recall, and expiration tracking.