METTLER TOLEDO G10S/G20S Smart Series Automatic Potentiometric Titrator

Overview

The METTLER TOLEDO G10S and G20S Smart Series Automatic Potentiometric Titrators are compact, CE-compliant laboratory instruments engineered for precision, traceability, and operational efficiency in regulated and routine analytical environments. Based on classical potentiometric titration principles—measuring potential difference across a reference and indicator electrode as titrant is incrementally added—the system delivers high reproducibility for acid-base, redox, precipitation, and complexometric titrations. Designed for GLP- and GMP-aligned workflows, both models comply with ISO/IEC 17025 requirements for method validation and data integrity. The G10S serves as a standalone, entry-level platform optimized for single-user labs performing standardized methods; the G20S extends functionality with integrated LabX Titration Express software, full audit trail capability per FDA 21 CFR Part 11, and networked instrument control—making it suitable for multi-user QC laboratories requiring electronic signatures and role-based access.

Key Features

• One Click® intuitive interface: Customizable home-screen shortcuts enable immediate initiation of preconfigured methods without navigation layers—reducing training time and operator error.
• Plug-and-play electrode and burette recognition: Integrated RFID chips store calibration history, expiration dates, and nominal concentration data; automatic detection ensures correct reagent-electrode pairing and prevents mismatch errors during setup.
• Compact Rondolino autosampler (optional): Supports up to 9 samples per sequence with automated rinsing, electrode immersion in dedicated wash cups, and programmable post-titration cleaning cycles—minimizing carryover and manual intervention.
• Integrated Solvent Manager: Controls solvent dispensing, waste aspiration, and reagent bottle switching under instrument command—eliminating direct handling of hazardous liquids and supporting OSHA-compliant lab practices.
• LevelSens liquid level monitoring: Real-time detection of waste container fill status prevents overflow and safeguards against environmental exposure or instrument damage.
• Pre-titration electrode diagnostics: Automated impedance and offset checks verify electrode readiness prior to each analysis—ensuring compliance with ASTM E2087 and USP guidelines for electrode performance verification.

Sample Compatibility & Compliance

The G10S/G20S accommodates aqueous and non-aqueous matrices including organic solvents (e.g., glacial acetic acid, ethanol), viscous samples (up to 500 cP), and suspensions—provided appropriate electrode selection (e.g., double-junction Ag/AgCl, pH-glass, or redox Pt electrodes) and sample conditioning (e.g., heating, stirring, degassing) are applied. All hardware components meet IEC 61010-1 safety standards for laboratory electrical equipment. Data acquisition and storage conform to ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available); the G20S further supports full 21 CFR Part 11 compliance via electronic signatures, audit trails, and secure user authentication.

Software & Data Management

The G10S operates with embedded firmware supporting method storage, result export (CSV, PDF), and basic report generation. The G20S integrates LabX Titration Express—a Windows-based application delivering centralized method management, real-time remote monitoring, customizable report templates, and relational database archiving. All titration events—including parameter changes, calibration logs, electrode diagnostics, and raw potential vs. volume curves—are timestamped and stored with immutable audit trails. Search filters support retrieval by sample ID, operator, date range, or method version—enabling rapid response to internal audits or regulatory inspections.

Applications

These titrators support validated applications across pharmaceutical QC (e.g., assay of active ingredients per USP monographs), food & beverage testing (acidity, salt content, SO₂ determination), water quality analysis (alkalinity, chloride, hardness), and chemical manufacturing (acid number, saponification value, free fatty acids). Method templates are available for ISO 8587 (sensory analysis), ISO 9001 (quality management), and pharmacopeial procedures including EP 2.2.20 and JP 2.07.

FAQ

What distinguishes the G10S from the G20S?

The G10S is a standalone instrument with embedded controls and local data export; the G20S adds LabX Titration Express connectivity, full 21 CFR Part 11 compliance, and enterprise-level data governance features.
Can the system be validated for GMP use?

Yes—both models support IQ/OQ documentation packages; the G20S includes built-in tools for periodic performance verification, calibration tracking, and electronic signature workflows required for regulated environments.
Is external autosampling supported beyond the Rondolino?

Only the optional Rondolino module is natively supported; third-party autosamplers require custom integration and are not covered under standard warranty or validation support.
How often must the electrode be calibrated?

Calibration frequency follows risk-based assessment per ISO/IEC 17025; typical practice involves daily two-point pH calibration and pre-run electrode diagnostics—automatically logged and reportable.
Does the system support non-aqueous titrations?

Yes—when paired with compatible non-aqueous electrodes (e.g., Li⁺-doped glass membranes) and solvent-resistant burettes, the system accurately performs titrations in methanol, acetonitrile, or DMF per ASTM D664 and IP 511 protocols.