Application of the Skalar SP1000 Analyzer for Drinking Water analysis

The Skalar SP1000 Analyzer is well known for the determination of biological oxygen demand (BOD) and chemical oxygen demand (COD), but has many more possibilities, such as the determination of pH, oxygen, conductivity, carbonate/bicarbonate and turbidity which are often used in Drinking Water laboratories.

Just like BOD/COD these parameters are labor-intensive and consequently ideal to be automated. The biggest advantage to automate pH, oxygen, conductivity, carbonate/bicarbonate and turbidity on the Skalar SP1000 is the fact that these parameters can all be analyzed simultaneously for each sample. Of course the Analyzer is able to continue the measurements during nighttime.

The standard 300ml bottles are filled with sample and placed on the SP1000. Each of the 5 racks contains 18 bottles which gives a capacity of 90 bottles. After starting the analyzer, all the parameters are calibrated. After the calibrations, the first bottle cap is removed and after 15 seconds of homogenization, with a stirrer, the oxygen concentration and temperature are measured. These two measurements are done first, because they need to be done “Freshly”. After these two measurements, part of the sample is transported with a digital pump unit to a separate titration vessel. Here the pH is measured. If the pH is higher than 8.30, the carbonate/bicarbonate is titrated. If the pH is in between 8.30 and 4.30, only the bicarbonate is titrated. A second part of the sample is used for the determination of conductivity and turbidity. Picture 1 shows the SP1000 analyzer for the analysis of pH, oxygen, conductivity, carbonate/bicarbonate and turbidity in drinking water.

Picture 1: SP1000 analyzer for pH, oxygen, conductivity, carbonate/bicarbonate
and turbidity in drinking water

For more information please contact Skalar Analytical BV