Determination of potassium in water
Potassium analysis with CDR BeerLab® allows, in a simple and fast way, to quantify the concentration of the analyte in the water used in the brewing process.
Method
Test type: End Point.
Time testing: 1 minute.
Analysis sessions with multiple samples are possible up to a maximum of 16 tests for CDR BeerLab® and 3 tests for CDR BeerLab® Junior.
Sample treatment
Use water solution as is.
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 potassium solutions. The trend of the curve confirmed an excellent linearity of the system over the whole measuring range.
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Reagent test Kits
Code *300680: 100 test
Code *300683: 10 test
The reagents have a shelf-life of 12 months
Measuring range
| Analyses | Measuring range | Resolution | Repeatability |
|---|---|---|---|
| Potassium [50-500] ppm | 50 - 500 ppm | 1 ppm | 6 ppm |
| Potassium [5-100] ppm | 5 - 100 ppm | 1 ppm | 2 ppm |
The Analyzers for process and quality control in beer brewing
CDR BeerLab®
- Complete analysis panel, supplied already configured
- Up to 16 determinations simultaneously
- Possibility of carrying out analyses of the same sample
- Integrated printer
- Full connections (LAN - USB - Bluetooth barcode/QR code reader)
CDR BeerLab® Jr
- Partial analysis panel, supplied configured with 3 analyses of your choice, implementable
- Up to 3 determinations simultaneously
- Wireless connection to external printer
- USB connections