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Full range AOX, TOX, POX and EOX instruments for the modern Environmental Laboratory


TE Instruments has developed the Xplorer, an AOX,TOX, POX and EOX analyzer offering fast, accurate and precise analysis of organic halogens. This brand new model is designed to offer customized solutions to match both current and future analytical needs.



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Full range AOX, TOX, POX and EOX instruments for the modern Environmental Laboratory


TE Instruments has developed the Xplorer, an AOX,TOX, POX and EOX analyzer offering fast, accurate and precise analysis of organic halogens. This brand new model is designed to offer customized solutions to match both current and future analytical needs.

Key features include:

  • Compact design
  • Fast generation of sample queues and application methods with TE Instruments software (TEIS)
  • Short start-up time (less than 15 minutes)
  • Fast and precise measurement of soil and liquid samples
  • Easy to use and intuitive user interface
  • Compact, stackable auto sampler for high sample throughput and low cost per analysis
  • Ultra low detection limit, high stability and reliability due to the temperature controlled titration cell
  • Low maintenance, optimal combustion and conditioning of gases results in near to zero downtime
  • Fast and easy switching between AOX, TOX, POX and EOX analysis, resulting in high productivity
  • CEN, DIN, EPA, ISO and NEN compliant



High Performance and High Throughput out of a small footprint


The TE Instruments analyzer is designed to measure rapidly and precise in a wide range of liquid and solid matrices. It is ideal for laboratories performing Organic Halogen analysis, if necessary for round-the-clock operation. The AOX, EOX and POX modules are easily interchangeable. In the AOX manual introduction mode, just one sample cup or frit handling is needed to get spot on results.
Assisted by a unique solid cup slider principle, the sample cup simply utilizes Newton’s law of gravity, by allowing the cup or frit to “fall” into the boat, before entering the horizontal furnace.
When the boat return’s from the furnace, the slider moves to the eject position, where the “burned” cup or frit is collected for re-use, without any pile-up in the furnace tube.
The Xplorer can be upgraded with the TE Instruments Newton-20, a solids auto sampler for full automation of the AOX batch & column method.


How does it work?


Once the pre-treatment is completed, the samples are oxidized at high temperature.
The combustion gas, carrying halide ions, is led into a sulfuric acid scrubber for rapid water and interference removal. The dried and clean gas is led into the temperature controlled titration cell, where the halide ions react with silver ions, present in the titration cell.
The amount of charge (the integral of the regeneration current over the measuring time) used to regenerate the lost silver ions,
is directly related to the Halogen content of the sample.





R-X + O2 → HX + CO2 + H2O




HX + Ag+→ H+ + AgX





Ag Ag+ + e



Compliance and Regulations

Our instruments comply with the following international standards for:





  • DIN 38409 part 14
  • DIN 38414 part 18
  • ISO 9562
  • EPA 9020
  • EN 1485




  • DIN 38409 part 8
  • NEN 5777
  • NEN 5735
  • NEN 6402
  • NEN 6676



  • NEN 6401



Meeting the toughest Standards and Regulations

Most of the organic halogens found in nature are toxic, carcinogenic, persistent and bio-accumulative.
Over time, these might pose a threat to the environment and to mankind. As a consequence, regulatory authorities around the Globe have issued mandates defining maximum permissible levels of these compounds in soil and water.
Analyzing their specific composition in order to identify whether they stay within the permissible limits is both difficult and time consuming. Therefore, standard methods have been developed to ensure fast and reliable screening for routine analysis. In general, there are three different methods:


  • AOX/TOX (Adsorbable / Total Organic Halogens)
  • POX (Purgeable Organic Halogens)
  • EOX (Extractable Organic Halogens)



Reference Methodology


Microcoulometry is the reference method for the determination of total organic halogen content in AOX, TOX, POX and EOX samples. This method complies with ISO, DIN, NEN
and EPA, leading to fast, quantitative, economical and absolute results. Our product range for environmental solutions provides a perfect match to these standard methods, helping our customers meeting the toughest requirements.


  • Drinking water
  • Surface water
  • Ground water
  • Effluent water
  • Influent water
  • Waste water
  • Cooling water
  • Salty water
  • Process water
  • Pulp and paper products
  • Soil
  • Sediment
  • Sludge and waste oil



Solution provider for the following industries:


  • Environmental laboratories
  • Drinking water laboratories
  • Pulp and paper laboratories
  • Governmental Institutes and Research Facilities
  • Universities



XPREP 3 (add-on): Effective Batch & Column filtration. Pre-Treatment for AOX and TOX Samples


TE Instruments has developed AOX/TOX sample pre-treatment systems that take advantage of proven methodology to satisfy today’s laboratories’ analytical needs.

The XPREP 3 is a 3 channel sample filtration unit designed to use for both batch & column method. The instrument consists of three independent filtration units, all of which can be equipped with quartz frit filters or joint columns. The quartz frit separates the water from the activated carbon after the adsorption stage, the column method adsorbs the halogens, while running through them at a rate of 3 ml/min.
Each autonomous channel is pressure- and therefore speed adjustable, while running both filtration methods.


Key features include:


  • Intuitive & Easy operation
  • Universal unit, suitable for both Batch & Column method
  • Compact size
  • Closed filtration system, preventing any risk of contamination from laboratory environment
  • Re-usable and self-cleaning quartz frit
  • High filtration speed for frit method
  • Independent and complete control of sample flow speed over the columns (per channel)
  • Adjustable input pressure control




TE Instruments Analytical Software (TEIS):


Ensuring intuitive and smooth control of your total halogen analysis. The advanced user interface of the TE Instruments Software (TEIS) ensures the smooth operation of the AOX, EOX, POX analyzers with user-friendly controls and operation. TEIS assists the user to achieve routine analysis in an
efficient, fast and reliable way. Instrument operation remains simple with the incorporation of clear and user friendly icons. This resourceful software makes it possible to modify sample queues, evaluate data and calibration lines, while running analysis. Results can be presented in customized print reports or exported in a variety of data formats.




One software solution for all TEI analyzers Reduces complexity and improves productivity
Real time measurement curves Maximal analysis control, compare samples at a glimpse                                                                
Multi-Elemental analysis Optimal analysis control and time saving procedure
Selectable user and service levels Security and data integrity
Customized application and analysis methods Full and flexible control of the analysis/system
Fully multi-tasking Efficient, user friendly and time saving



 XPLORER System Specification


Dimensions (W x H x D) 40 x 28 x 70cm (15.7 x 11 x 27.6 inch)
Weight 29kg (64lbs)
Voltage 100-240 V, 50-60 Hz
Power requirement (max) 1150 W
Gas connector 1/8" Swagelok
Gases Oxygen 99.6 % (2.6), Argon 99.998 % (4.8)
Input gas pressure 2-10 bar
Internal gas pressure 1.8 bar, adjustable
Furnace voltage Dual zone, low voltage
Furnace temp. (max) 1150 °C (2102 °F)
Furnace cooling Pulling Fan, auto control
Sample introduction AOX/TOX: Quartz boat
Solids: 5-1000 mg
Boat driver Software controlled, adjustable
Slider/shutter driver Software controlled, adjustable
Detector SMD, Digital Coulometer
Detector accuracy Better than 2% CV
Titration cell conditioning Temperature controlled, adjustable
Software dot.NET-based, TEIS software
Ambient temperature 5-35 °C (41-95 °F)