Metrohm 940 Professional Peak Thinking™ Ion Chromatography System

Overview

The Metrohm 940 Professional Peak Thinking™ Ion Chromatography (IC) System represents a paradigm shift in modular, high-precision anion and cation analysis for modern analytical laboratories. Engineered on the principle of suppressed and non-suppressed conductivity detection—complemented by amperometric and UV/Vis detection modalities—the system delivers trace-level quantification across an exceptionally broad dynamic range (ng/L to % w/w). Its core architecture is built around a fully integrated, field-upgradable module concept that decouples fluidic, thermal, detection, and software subsystems without compromising mechanical stability or chromatographic integrity. Designed and manufactured in Herisau, Switzerland, the 940 Professional adheres to ISO 9001-certified production protocols and meets stringent requirements for GLP-compliant environments, including full audit trail support, electronic signature capability, and instrument qualification documentation packages per ASTM E2500 and ICH Q2(R2).

Key Features

• Modular, tool-free hardware architecture enabling rapid reconfiguration between anion and cation analysis modes—switch completed in under 60 minutes without recalibration.
• Triple-compatible suppression platform supporting chemical suppression, CO₂-chemical tandem suppression, and non-suppressed operation—interchangeable via standardized rotor adapters for MSM-HC, MSM II, and MSMLC suppressors.
• High-pressure binary or quaternary gradient delivery (up to 5-solvent capability) with programmable low-pressure, high-pressure, or Dose-in gradient modules—ensuring precise eluent composition control across complex multi-analyte separations.
• Temperature-stabilized column compartment (0–80 °C, ±0.2 °C reproducibility) compatible with all major IC column chemistries—including high-capacity, hydroxide-selective, and metal-chelating phases.
• Universal detector interface supporting native integration of Metrohm’s digital conductivity detectors (e.g., 850 Conductivity Detector), pulsed amperometric detectors (PAD), and UV/Vis flow cells—plus external coupling to mass spectrometers (IC-MS) and ICP-MS systems via standardized analog/digital I/O and TTL synchronization.
• Robust dual-piston reciprocating pump capable of sustained operation at up to 50 MPa, delivering flow rates from 0.001 to 20.000 mL/min with <0.1% RSD precision over 24-hour runs.

Sample Compatibility & Compliance

The 940 Professional accommodates diverse sample matrices—from ultrapure water and pharmaceutical excipients to industrial effluents, food extracts, and geological digests—without requiring dedicated hardware variants. Its intelligent leak detection, pressure monitoring, and automatic baseline correction algorithms ensure consistent performance across variable sample loads and viscosities. The system complies with key regulatory frameworks including USP , ASTM D4327 and D6919, ISO 14911, and EN 14802. All firmware and MagIC Net software versions are validated for FDA 21 CFR Part 11 compliance, featuring role-based access control, immutable audit trails, electronic signatures, and full data integrity (ALCOA+ principles). Routine IQ/OQ/PQ documentation templates are provided as part of the standard qualification package.

Software & Data Management

Control, acquisition, processing, and reporting are unified within MagIC Net v4.x—a validated, Windows-based chromatography data system (CDS) developed exclusively for Metrohm IC platforms. The software supports method templating, sequence scheduling, real-time peak tracking, automated calibration curve generation, and customizable report export (PDF, CSV, XML). Integrated data archiving includes automatic backup to network drives or NAS devices, with optional encryption and retention policy enforcement. Raw data files adhere to ANDI/NetCDF standards, ensuring long-term readability and third-party software interoperability. Version-controlled method libraries enable seamless transfer between instruments and laboratories while preserving analytical consistency across global QC networks.

Applications

• Environmental monitoring: Quantification of F⁻, Cl⁻, NO₂⁻, Br⁻, NO₃⁻, PO₄³⁻, SO₄²⁻, and AsO₄³⁻ in drinking water, wastewater, and rainwater per EPA Method 300.0 and ISO 10304-1.
• Pharmaceutical quality control: Counterion profiling (Na⁺, K⁺, Ca²⁺, Mg²⁺) in APIs; residual acetate, citrate, and phosphate in biologics formulations; chloride testing in parenterals per USP .
• Food & beverage safety: Nitrate/nitrite in cured meats; sulfite in wines; iodide in dairy; bromide in soft drinks; and organic acids (lactate, citrate, malate) in fruit juices.
• Energy & materials science: Anionic impurities (Cl⁻, F⁻, SO₄²⁻) in battery electrolytes; cationic contaminants (Li⁺, Na⁺, K⁺) in fuel cell membranes; and halide speciation in photovoltaic precursor solutions.

FAQ

Can the 940 Professional operate in both suppressed and non-suppressed IC modes?
Yes—it natively supports chemical suppression, CO₂/chemical tandem suppression, and direct conductivity detection without hardware modification.
Is MagIC Net software compliant with FDA 21 CFR Part 11?
Yes—full electronic signature support, audit trail logging, and role-based user management are enabled out-of-the-box and validated during installation qualification.
What is the maximum number of solvents supported in gradient elution?
The system supports up to five independent eluent channels when configured with the optional 942 Gradient Extension Module.
Does the system require dedicated columns for anion vs. cation analysis?
No—column switching is fully software-driven; compatibility spans Metrohm’s full portfolio of anion-exchange, cation-exchange, and hybrid-phase columns.
How is system suitability verified during routine operation?
Built-in system suitability tests include retention time stability, peak area precision, resolution check, and conductivity baseline noise assessment—all configurable and reportable within MagIC Net.