Complete automation for st-COD analysis on the SP50 and SP1000 analyzers

SP50 st-COD analyzerSkalar is pleased to present the next step in automation for the small scale sealed-tube COD analysis including automatic sample pipetting. This new feature completes the automation of st-COD procedure.  

The procedure for the st-COD analysis is as follows:

The sample– and reagent tubes are loaded on the analyzer by the operator. The sample table is set up and the analyzer is started.

The following actions are performed automatically by  the Robotic analyzers:

  1. Reagent tube is picked up and is transported to the de-capping device.
  2. Tube de-cappingThe reagent tube is automatically de-capped
  3. Sample is homogenized, diluted and a predefined volume of the sample is picked up
  4. Sample is dispensed into the reagent tube
  5. The reagent tube is capped
  6. The sample needle and stirrer are rinsed
  7. The sample and the reagent are mixed
  8. The reagent tubes are inserted one by one into the heater block
  9. Samples are digested for two hours at 148  ̊C
  10. The tubes are transferred to the tube rack to cool down to approximately 60  ̊C
  11. The tubes are mixed and left to cool down to room temperature
  12. Sample pipettingTubes are transferred to the spectrophotometer and the sample is measured
  13. After measurement the results are calculated and a QC trend is created

Both the SP50 and SP1000 analyzers provide in this way a complete automation of the  st-COD procedure. The sample capacities for the SP50 and SP1000, including automatic sample pipetting, are respectively 96 and 160 tubes in one batch.

The Robotic SPseries offer a real “walk-away” fully automated COD concept, including mixing, heating, (de) capping, sample pipetting, cooling and photometric measurement. The Skalar SPseries are also available for automation of other colorimetric applications.