CDR CoffeLab analyzer for controlling fermentation processes, for defining the chemical profile of green beans, roasted coffee and the drink.

Determination of potassium in water

Potassium analysis with CDR CoffeeLab allows, in a simple and fast way, to quantify the concentration of the analyte in the water used for making coffee.


Test Principle

Potassium ions precipitate with sodium tetraphenylborate. The absorbance determined at 420 nm is proportional to the amount of analyte present in the water sample.


Calibration curve

The calibration curve was constructed using standard chloride solutions. The trend of the curve confirmed an excellent linearity of the system over the whole measuring range.

The calibration curve of the analysis of potassium on water with CDR CoffeeLab obtained using standard potassium solutions. R²=0.9952

Reagent test Kits

Measuring range

AnalysesMeasuring rangeResolutionRepeatability

CDR CoffeeLab the analysis equipment for the world of coffee from origins to roasting


CDR CoffeeLab

  • Pannello di analisi completo, fornito già configurato
  • Fino a 16 determinazioni in contemporanea
  • Possibilità di compiere analisi sullo stesso campione
  • Stampante integrata
  • Connessioni complete (LAN - USB - bluetooth lettore barcode/qr code)