Kombucha, being a fermented beverage obtained from tea, contains polyphenols and catechins. These can vary during the fermentation process so their quantification is a very important quality parameter for production purposes. The polyphenolic concentration also affects the organoleptic qualities of the drink. In this sense, the management of this parameter acquires even more importance.
CDR KombuchaLab: Instruments for the determination of Total Polyphenols in Kombucha
The instruments are supplied pre-calibrated and ready to use.
The results are expressed according to the reference method.
The methods are simple: there is no need for an equipped laboratory or for specialist personnel.
 CDR KombuchaLab |
 CDR KombuchaLab Junior |
|
|---|---|---|
| Analyses | Kombucha: Alcohol by Volume Acetic Acid Fermentable Sugars Gluconic Acid Total Lactic Acid Yeast Assimilable Nitrogen (YAN) Glycerol Total Polyphenols |
Configuration with tailored panel of analyses |
| Simultaneous Sample Analyses | 16 | 3 |
| Multiple Analyses on a Sample |  |
– |
Method
Test type: End Point.
Testing time: 10 minutes.
Analysis sessions with multiple samples are possible for up to a maximum of 16 tests for CDR KombuchaLab and 3 tests for CDR KombuchaLab Junior .
Calibration curve
The calibration curve of the CDR KombuchaLab instrument, obtained by comparing the CDR method with the method for determining the Total Polyphenols at 280nm, confirmed an excellent linearity of the system over the entire measurement range.
Test Principle
Polyphenols absorb at a wavelength of 280 nm. Absorption at this wavelength is proportional to the polyphenolic concentration present in the sample.
Reagent test Kits
The reagents are packaged in foil pouches containing 10 tubes useful to perform 10 analyses.
This is the minimum package that allows the use of CDR systems even to those who need to make a few analyses, thus not wasting reagents.
There are also boxes of 100 tests, however, packaged in 10 bags of 10 tubes containing the reagent.
Code. *300495: 10 tests
Code. *300505: 100 tests (10 packages of 10 tests)
The reagents have a shelf-life of 12 months
Processing Sample
For precise and repeatable analysis, the sample must be degassed with the appropriate ultrasonic bath (code 222062) with the mini-centrifuge (code 222061) to separate the solid particles present in the solution.
Measuring Range
| Test | Measuring range (280nm) |
Resolution (280nm) |
Repeatability (280nm) |
|---|---|---|---|
| Total Low Content polyphenols | 1 – 15 D.O. | 0.1 D.O. | 0.3 D.O. |
| Total High Content polyphenols | 10 – 140 D.O. | 0.1 D.O. | 3.1 D.O. |
