Skalar SP10 COD Robotic Analyzer for the measurement of COD

Small scale sealed-tube method according to ISO 15705 and EPA 410.4

SP10 COD Analyzer

Most laboratories are familiar with the well-known chemical oxygen demand or COD value of water. The Chemical Oxygen Demand (COD) test is intended for the examination of waters of various qualities.

The COD value of water as determined by this dichromate method can be considered as an estimate of the theoretical oxygen demand, i.e. the amount of oxygen consumed in total chemical oxidation of the organic constituents present in the water.

This small scale sealed-tube COD test method can be used for any aqueous sample, i.e. water suitable for domestic or industrial supplies, surface water, ground water, cooling or circulating water, boiler feed water, treated and untreated sewage or industrial waste water and saline waters.

Skalars latest development is the SP10CODrobotic analyzer, which has been designed for the cost-effective automation of COD analysis. Thisrobotic analyzer offers a real walk-away concept for the sealed-tube method according to ISO 15705 and EPA 410.4.

The SP10CODanalyzer consists of a XYZ sample handling station with a sample capacity of 96 tubes. Higher capacity is possible on our SP50COD robotic analyzer.

After the homogeneous sample is added into the reaction tubes by the operator, the tubes are placed in the sample racks and the analyser is started. The analyser will pick-up the tubes and mixes them. Then the tubes will be automatically positioned in the reactor where they are heated for two hours at 150 ºC. The analyser keeps track of the reaction time per tube.

When the reaction time is completed the analyzer places the tubes in the sample rack to cool down to 60ºC, after which they are mixed when still being warm. After the samples are cooled down to ambient temperature they will be measured with a photometric detector on the required wavelength The concentration is shown in the result screen of the software and the data can be transported to the LIMS system.

Skalar's SP10 robotic analyzer can also be configured to automate one of the following applications:

  • BOD (Biochemical Oxygen Demand)
  • PH in soil and water
  • Conductivity
  • Ammonia ISE
  • Chloride
  • Hardness
  • Alkalinity
  • Oxygen
  • Turbidity
  • Color


Also all our robot analyzers can be used as sample preparation unit such as dilution station, sample splitter or titration sampler.

The software is designed as a modular data acquisition and instrument control system. For each Robotic Analyzer, the specific applications of the analyzer are pre-set in the software. The user friendly software for the SP10 is easy to set-up and operate in day-to-day routine analysis.With password protected levels, user definable worksheet & report lay-outs and easy LIMS connection it fully meets the requirements of today's analytical laboratory.


For more information please contact Skalar.