TOX-300

High-Accuracy TOX, Chlorine & Sulfur Determination for Environmental and Industrial Applications

The Nittoseiko TOX-300 is a robust and cost-effective total organic halogen analyzer designed for precise quantification of chlorine and sulfur in solid, liquid, and gaseous samples. With soot-free combustion, coulometric titration, and an application-oriented modular design, the TOX-300 provides a reliable analytical platform for environmental monitoring, wastewater treatment plants, chemical facilities, recycling industries, refinery operations and regulatory laboratories.

Supporting international official methods—including US EPA 9020B, 9021, 9076, ISO 9562, ISO 11480, DIN 38414-17/18—the TOX-300 ensures full compliance with global environmental standards.

Key Features & Advantages

⚡ 1. High-Speed Analysis with Auto Boat Controller

Simply place the sample boat into the inlet, start the run, and the TOX-300 performs everything automatically.

• Fast analysis: 6–12 minutes per sample
• Electronically cooled sample boat inlet for rapid turnaround
• Ideal for high-throughput environmental labs

🔧 2. Application-Oriented Modular Configuration

The TOX-300 supports a variety of optional accessories, enabling tailored configurations depending on sample type and industry requirements.

• Customizable for water, sludge, solids, oils, fuels, polymers and gas samples
• Ideal for plants requiring flexible TOX measurement workflows

🔥 3. Matrix-Independent Secure Combustion Program (SCP)

A unique single-program combustion sequence ensures:

• Soot-free, complete pyrolysis, even for complex matrices
• Stable combustion for both halogen and sulfur analysis
• No need to adjust the combustion program for different sample types

🎯 4. Improved Lower Detection Limits

• High-sensitivity coulometric titration
• Detection down to ppm levels
• Suitable for trace contaminant monitoring and regulatory compliance

🧪 Measurement Principles

Chlorine Analysis – Coulometric Silver Titration

Samples combust in an Argon/Oxygen atmosphere.

Released chloride is transported to the titration cell and titrated automatically using coulometrically generated Ag⁺ ions.

Reactions:

HCl + Ag⁺ → H⁺ + AgCl (titration)

Ag → Ag⁺ + e⁻ (electrolysis)

Chlorine concentration is calculated from the electrical charge required for titration.

Sulfur Analysis – Coulometric Triiodide Titration

Combustion converts sulfur compounds to SO₂, which is introduced into a titration cell where I₃⁻ ions are used for automatic titration.

Reactions:

SO₂ + I₃⁻ → SO₃ + 2H⁺ + 3I⁻ (titration)

3I⁻ → I₃⁻ + 2e⁻ (electrolysis)

Sulfur concentration is determined from the required coulometric charge.

🌍 Typical Applications

The TOX-300 is ideal for:

• Environmental TOX monitoring (surface water, wastewater, effluents)
• TOX determination in sludge and sediment
• Quality control in petrochemical, chemical and recycling plants
• Monitoring halogen and sulfur contamination in industrial processes
• Research laboratories requiring ppm-level halogen/sulfur quantification

✔ Why Choose the Nittoseiko TOX-300?

• Cost-effective, high-precision TOX analysis
• Matrix-independent combustion for all sample types
• Fast automated operation with minimal training
• Industry-proven coulometric titration
• Conforms to leading international methods (EPA, ISO, DIN)
• Reliable and durable design for continuous environmental monitoring

📌 For full specifications, accessory options, and official documentation, please visit the Nittoseiko TOX-300 product page.