Fermentable sugars analysis in cider
Yeasts use only fermentable sugars, glucose and fructose for the production of ethanol during fermentation. The control of the residual fermentable sugars during the process allows to follow the various stages until the end of fermentation. The analysis of total sugars is also an excellent parameter for determining the fermentative potential of the must.
With CDR CiderLab the determination of the fermentable sugars in the cider is based on the reference method, but it is easier and faster.
CDR made available a new fermentable sugars test, which allows to determine, in addition to the value of glucose and fructose, also the value of sucrose.
Method
Three different kits for the determination of fermentable sugar
- Fermentable sugars GF (Glucose-Fructose)
With this kit you can determine the total amount of fermentable sugars: Glucose + Fructose - Fermentable sugars GFS (Glucose-Fructose-Sucrose)
With this kit you can determine the total amount of fermentable sugars: Glucose + Fructose + Sucrose - Glucose-Fructose
With this kit you can determine the value of glucose and fructose separately
Test type: End Point.
Fermentable sugars GF
Time testing: 6 minutes.
Fermentable sugars GFS
Time testing: 11 minutes.
Glucose-Fructose
Time testing: 4 minutes.
Analysis sessions with multiple samples are possible up to a maximum of 16 tests for CDR CiderLab and 3 tests for CDR CiderLab Junior.
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Sample treatment
If necessary, the sample shall be degassed using the specific ultrasonic bath (code 222062). In case of tests performed on must, the sample shall be centrifuged (code 222061) or filtered (code 300210). Dilute the sample if required by the method.
Test principle
The glucose and fructose present in the sample are determined enzymatically and therefore are not influenced by the presence of the remaining reducing sugars. The Redox reaction is read at 366 nm (end-point) and the value is directly proportional to the concentration of glucose and fructose in the sample.
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The sucrose, when present in the sample, is determined enzymatically splitting it into glucose and fructose.
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Calibration Curve
The calibration curve of CDR CiderLab, obtained using reference methods, confirms the excellent linearity of the system over the whole testing range.
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Reagent test Kits
Fermentable sugars GF
Fermentable sugars GFS
Glucose-Fructose
Measuring range
| Analyses | Measuring range | Resolution | Repeatability |
|---|---|---|---|
| Glucose fructose [15-350 g/L] | 15 - 350 g/L Glucose | 1 g/L Glucose | 2 g/L Glucose |
| Sugars (glu,fru)[0.1-18 g/L] | 0.1 - 18 g/L | 0.1 g/L | 0.1 g/L |
| Sugars (glu,fru)[15-350 g/L] | 15 - 350 g/L | 1 g/L | 2 g/L |
| Sugars (glu,fru,suc)[15-350 g/L] | 15 - 350 g/L | 1 g/L | 2 g/L |
| Glucose fructose [0.1-18 g/L] | 0.1 - 18 g/L Glucose | 0.1 g/L Glucose | 0.1 g/L Glucose |
The Analyzers for process and quality control in cider production
CDR CiderLab
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 CiderLab Jr
Partial analysis panel, customisable configuration
Up to 3 determinations simultaneously
Wireless connection to external printer
USB connections