CDR BeerLab® - simple, fast and reliable analysis system of beer.

Determination of FAN in beer and wort

Free Amino Nitrogen by OPA (FAN) is a test that allows to manage correctly the alcohol fermentation. Infact, the lack of Nitrogen can cause a slowing-down or even the stop of the fermentation, compromising seriously the quality and the organoleptic characteristics of the beer.

FAN analysis with the CDR BeerLab® method gives the possibility to carry out with accuracy the appropriate corrections before and during the alcohol fermentation.


Test Principle

Organic Nitrogen - The α-amino Nitrogen reacts in presence of N-acetyl-L-cysteine with o-phthalaldehyde forming an isoindole derived. The difference of absorbance, measured at 366 nm (end point), is correlated with the quantity of Organic Nitrogen expressed in mg/L of Nitrogen.

Calibration Curve

Calibration curve obtained with samples of known values.


Reagent test Kits

Measuring range

AnalysesMeasuring rangeResolutionRepeatability


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