Analysis of Glycerol in cider
Among the polyalcohols which are formed during the fermentation there are mannitol, sorbitol, butylene glycol and glycerol. The latter is particularly interesting because the cider can be present with values ranging between 5-18 g/L and is also produced in large quantities by noble rot during the production of passito ciders. This explains the softness and elegance of this type of cider.
Method
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 with the included dilution kit, as required by the method.
Principle of the test
The glycerol reacts, by an enzyme, with a phenolic derivative and induces the formation of a complex pink color whose intensity, measured at 505 nm, is directly proportional to the concentration of glycerol in the sample. The result is expressed in g/L.
Calibration curve
The calibration curve of CDR CiderLab, obtained using reference methods, confirms the excellent linearity of the system over the whole testing range.
...
Reagent test Kits
Code*300517: 10 tests
Code*300520: 100 tests
Measuring range
| Analyses | Measuring range | Resolution | Repeatability |
|---|---|---|---|
| Glycerol | 2 - 10 g/L | 0.1 g/L | 0.1 g/L |
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