Thermo Scientific Dionex Aquion IC System

Overview

The Thermo Scientific Dionex Aquion IC System is a benchtop ion chromatography platform engineered for precision, operational simplicity, and long-term reliability in routine anion and cation analysis. Built upon proven Dionex IC architecture, it employs suppressed conductivity detection with electrolytically generated eluents—eliminating the need for manual eluent preparation and minimizing baseline drift. The system utilizes a dual-piston high-pressure pump capable of stable flow delivery up to 5.00 mL/min at pressures up to 5000 psi, enabling robust separation across a wide range of ion-exchange columns—including those requiring elevated backpressure for high-resolution applications. Its thermally stabilized column compartment maintains temperatures between 30 °C and 60 °C with ±0.5 °C reproducibility, ensuring retention time stability critical for quantitative compliance workflows.

Key Features

• Dual-piston isocratic or gradient-capable pump with active pulse dampening for low-flow precision and extended seal life
• Integrated electrolytic eluent generator (EG) compatibility—supports automated, on-demand generation of KOH, MSA, or carbonate/bicarbonate eluents at concentrations from 0.1 to 100 mM
• Thermostatically controlled column oven with rapid equilibration and microprocessor-driven temperature regulation
• High-sensitivity, digitally compensated conductivity detector with auto-ranging and real-time background subtraction
• Compact footprint (less than 0.5 m²) optimized for space-constrained QC labs and teaching laboratories
• Modular design supporting future upgrades including autosampler integration, inline filtration, and post-column reaction modules

Sample Compatibility & Compliance

The Aquion IC System is validated for analysis of common inorganic anions (F⁻, Cl⁻, NO₂⁻, Br⁻, NO₃⁻, PO₄³⁻, SO₄²⁻) and cations (Li⁺, Na⁺, NH₄⁺, K⁺, Mg²⁺, Ca²⁺) in diverse matrices—including drinking water, wastewater, food extracts, pharmaceutical excipients, and biological fluids. It meets method requirements outlined in EPA Methods 300.0, 300.1, and 317.0; ISO 10304-1:2012 (water quality); and USP (conductivity of purified water). When operated with Chromeleon CDS under configured security settings, the system supports audit trail generation, electronic signatures, and user access controls compliant with FDA 21 CFR Part 11 and EU Annex 11 for regulated environments. Routine performance verification follows ASTM D4327 and ISO/IEC 17025 calibration protocols.

Software & Data Management

Control, acquisition, processing, and reporting are fully integrated through Thermo Scientific Chromeleon Chromatography Data System (CDS) 7.3 or later. Chromeleon provides sequence-driven operation, peak integration using ISO-compliant algorithms (e.g., tangent skim, valley-to-valley), customizable report templates, and structured data export (CSV, XML, PDF). Audit trail functionality records all method changes, injection events, calibration updates, and user logins with timestamps and operator IDs. Data integrity safeguards include write-protected raw data folders, version-controlled method storage, and optional network-based backup to NAS or cloud repositories aligned with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).

Applications

• Environmental monitoring: Quantification of regulated anions in surface water, groundwater, and effluent per EPA and EU WFD directives
• Food & beverage safety: Nitrate/nitrite testing in cured meats, bromate in bread, sulfite in wines, and iodide in dairy products
• Pharmaceutical quality control: Counterion analysis in APIs, residual chloride in injectables, and sulfate testing in excipients per ICH Q5C and USP monographs
• Academic research: Teaching fundamental chromatographic principles, method development for novel ionic species, and validation of sample prep workflows
• Industrial process control: Monitoring rinse water conductivity in semiconductor fabrication, corrosion inhibitor anions in cooling towers, and catalyst leachates in petrochemical streams

FAQ

Does the Aquion IC System support gradient elution?
Yes—the dual-piston pump enables precise isocratic and two-solvent gradient elution when paired with optional gradient modules and compatible eluents (e.g., KOH gradients for complex anion mixtures).

Can it be used for trace-level analysis in ultrapure water?
With appropriate column selection (e.g., Dionex IonPac AS26), sub-ppb detection limits for chloride and sulfate are achievable using preconcentration techniques and low-noise conductivity detection.

Is hardware validation documentation included?
Factory-installed IQ/OQ documentation packages are available; full PQ protocols may be developed in accordance with lab-specific SOPs and regulatory expectations (e.g., ISO/IEC 17025).

What maintenance intervals are recommended?
Pump seal replacement every 6–12 months depending on usage; suppressor cartridge replacement every 1,000–2,000 injections; annual calibration verification using NIST-traceable standards.

Is remote monitoring supported?
Chromeleon CDS supports secure remote access via HTTPS-enabled web interface or VPN-tunneled desktop connection, enabling off-site method review and instrument status checks without compromising data security.