Analytik Jena multi X 2500 Total Organic Halogen (TOX) Analyzer

Overview

The Analytik Jena multi X 2500 is a fully automated, high-precision total organic halogen (TOX) analyzer engineered for regulatory-compliant determination of adsorbable organic halogens (AOX), extractable organic halogens (EOX), purgeable organic halogens (POX), total halogen (TX), and total organic carbon (TOC) in aqueous and solid environmental matrices. It operates on the principle of high-temperature catalytic combustion (up to 1050 °C) followed by selective electrochemical detection via coulometric titration — a method standardized in ISO 9562, DIN 38409-23, EPA Method 1650, and ASTM D5907. The instrument integrates dual-furnace architecture (switchable horizontal and vertical configurations), enabling optimized thermal decomposition pathways for diverse sample types — from low-salinity surface water to high-matrix wastewater sludge or soil extracts. Its design emphasizes analytical robustness, long-term calibration stability, and minimal operator intervention, fulfilling core requirements for laboratories operating under GLP, ISO/IEC 17025, and EPA-certified environmental testing protocols.

Key Features

• Dual-furnace system: Switchable horizontal and vertical furnace modes allow method-specific optimization for volatile vs. non-volatile halogenated compounds, improving recovery accuracy across heterogeneous sample matrices.
• Patented coulometric detection cell: Features a maintenance-free combined electrode assembly without salt bridge, delivering stable baseline response and extended service intervals between calibrations.
• Flame sensor technology: Dynamically adjusts sample introduction parameters (e.g., carrier gas flow, injection timing, combustion ramp profile) based on real-time flame conductivity feedback — enhancing reproducibility for variable organic loadings.
• GasBox™ pneumatic control module: Provides precise, pressure-stabilized gas flow management for oxygen, carrier gas, and auxiliary purge streams — critical for minimizing interferences and ensuring operational safety during high-temperature oxidation.
• Modular front-end compatibility: Supports optional solid-phase extraction (SPE) columns, batch-mode adsorption units, and automated liquid/solid samplers — enabling seamless adaptation to ISO, EPA, or client-specific sample preparation workflows.
• Plug-and-play accessory recognition: Firmware auto-detects connected modules (e.g., TOX/TOC dual-module kit, EOX extraction station), automatically loading appropriate method templates and validation parameters.

Sample Compatibility & Compliance

The multi X 2500 accepts liquid samples (0.1–100 mL), suspended solids (filtered or digested), and solvent-extracted residues. It complies with international standard methods including ISO 9562 (AOX), ISO 25101 (EOX), ISO 20677 (POX), ISO 8245 (TOC), and EPA Methods 1650 (AOX), 1651 (EOX), and 415.3 (TOX). All measurement sequences support full audit trails, electronic signatures, and data integrity controls aligned with FDA 21 CFR Part 11 requirements when operated with optional LIMS-integrated software packages. Instrument qualification documentation (IQ/OQ/PQ) is provided per GxP guidelines.

Software & Data Management

Controlled via the multiWin® 4.0 software platform, the system supports method-driven workflow automation, real-time signal monitoring, and integrated calibration curve generation using certified KCl standards. Raw coulometric current traces, furnace temperature profiles, and gas flow logs are stored in vendor-neutral .csv and .xml formats. Software modules include automatic spike recovery calculation, matrix-matched calibration bracketing, and compliance reporting templates for AOX/TOX/TOC according to EU Water Framework Directive Annexes and US Clean Water Act discharge reporting formats.

Applications

Primary use cases include municipal and industrial wastewater treatment plant monitoring; pharmaceutical and chemical manufacturing effluent screening; pulp and paper mill discharge compliance; landfill leachate characterization; and regulatory submission support for REACH, WFD, and TSCA reporting. The instrument is routinely deployed in accredited environmental testing labs conducting routine AOX surveillance in drinking water sources, as well as research institutions investigating halogenated disinfection byproduct formation kinetics and degradation pathways in advanced oxidation processes.

FAQ

What halogen species does the multi X 2500 quantify?
It measures total oxidizable halogens (Cl, Br, I) as chloride-equivalent mass concentration; fluorine is not detected due to its volatility and non-coulometric reactivity under standard combustion conditions.
Can the same sample be analyzed for both AOX and TOC without re-injection?
Yes — when equipped with the dual-module configuration, the system performs sequential AOX adsorption/combustion and TOC direct combustion on a single sample aliquot using synchronized valve switching and detector reconfiguration.
Is method validation support available for laboratory accreditation?
Analytik Jena provides application notes, system suitability test protocols, and IQ/OQ documentation packages compliant with ISO/IEC 17025:2017 Annex A.2 for method transfer and internal validation.
What maintenance intervals are recommended for the coulometric cell?
Under typical operation (≤100 samples/week), electrode cleaning and electrolyte replacement are required every 6 months; the patented electrode design eliminates salt bridge refilling and reduces downtime by >70% versus conventional cells.
Does the instrument support unattended overnight operation?
Yes — with an optional 80-position autosampler and integrated power/failure recovery logic, the system resumes interrupted sequences after power restoration and maintains all calibration states and audit trail continuity.