AOX-200 analyzer

With its fourth generation of TOX/AOX/EOX Analyzer Mitsubishi Chemical Analytech have created the AOX-200.

AOX-200 follows EPA Methodology (Activated Carbon Adsorption / Oxidative Combustion/ Microcoulometric Titration) for the measurement of TOX/AOX/EOX in surface water, ground water, wastewater and soils.

The front accessible titration cell and the open vertical furnaceand  40 position autosampler give to this instrument all the performaces needed for all  up  to date environmental lab.

 The AOX-200 meets DIN, EN, EPA and 40 CFR methodologies as well as ICR (Information Collection Rule) and DBPR (Disinfectant/Disinfection Byproducts Rule) measurement requirements.

Performances:

• Measure TOX, AOX & EOX with one instrument
• Injects Activated Carbon columns or ceramic frits (shaking methode) directly into furnace
• No more acetic acid smell in your lab due to the Acetic acid destruct tube r
• Runs on compressed or atmospheric air (Use Air 200 ), no need of gaz cylinders
• ; Oxygen, Argon and Carbon Dioxide Gas Cylinders Not EOX Option for Extractable Organic Halides in soil analysis
• 40-position autosampler for TOX(AOX)
• 50-Position autosampler for EOX
• 40-position Frit Autosampler for Batch AOX (standard configuration)
• Measurment range : 0,1 to50 ug
• Measurement time less than 10 min. (2ug sample)
• Repetability  < 3% for samples of 100 ng /ml, sample volume 20 ml (batch mode)
• Recovery  95 to 105 %

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AOX-400 analyzer

• 3-injection mode convertible (shaking method/ column method/ EOX)
• Advanced autosampler concept is space saving and reliable
• Faster measurement time
• Automatic gas flow
• No gases required except air (same as AOX-200)
• Longer lifetime of electrolyte by cell cooling system
• Increase the default number of samples
• Easy maintenance of pyrolysis tube by sliding turntable.

AOX adsorbed on activated carbon is pyrolyzed at high temperature  in a quartz combustion tube. Combustion gases containing hydrogen halides are forced through a dehydrating tube and subsequently adsorbed within the electrolyte in a coulometric titration cell.

Within the titration cell the halogen ions are quantified by an argentometric coulometry. The amount of chlorine is calculated from the quantity of electricity required for the formation of silver ions.

HCI + Ag+ ➔ H+ + AgCI (Titration)
Ag ➔ Ag+ + e- (Electrolysis)

The gas is moved by application of suction pump all over the installation, so that no leakage of sample can occur. Using this technology, the residual vapor of acetic acid from the titration cell is destroyed at high temperature into a so called deodorizing tube, placed close to the pyrolysis oven.

Nittoseiko's AOX-400 Automatic Organic Halogen Analyzer measures organic halogen in river water, industrial wastewater, and soil via shaking method, column method, and EOX.

Advanced autosamplers provide flexible combination of different modes easily and in a very small footprint

ISO 9562, DIN EN 1485:    Water quality-determination of absorbable organic halogens , AOX/EOX.

EPA 9020, ICR (EPA 814-8-96-002 for QC):  Total organic halides , AOX - Column method.

DIN 38414 part 18: Sludge and Sediment-Determination of adsorbed organically bound halogens, AOX -Shaking method

Measurement principe

Main advantages

Official method compatibility

Main characteristics: