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Determination of Beer Bitterness Units

The IBULyzer™ is a cost-effective analyzer that was developed to automate the manual iso-octane extraction method for bitterness tests on a large number of sampling points. The beer analyzer complements internal brewery quality control procedures allowing to brew each time that same unique beer, yet with tight control over the IBU values.

At the same time, the IBULyzer™ is an alternative to highly selective liquid chromatography methods for determination of bitterness units. The automatic analysis system harnesses technology from AppliTek’s product family of process colorimeters, with fast results that are displayed either on the analyzer display or accessible by desktop PC or mobile device.


With a huge variation in bitterness compounds and perceived differences in bitterness taste, beer bitterness tests have become an essential part of the quality control procedures in commercial beer production. The predominant source of bitterness in beer are the iso-α acids, derived from α-acids which are present in the flowers of the female hop plant. Contrary to highly selective methods such as HPLC, the manual iso-octane extraction method is of relative simplicity and still widely used to determine the IBU.


—Similar with internationally applied manual iso-octane extraction method

Bitterness as sum parameter: iso α-acids + other components

Excellent accuracy and precision (repeatability)

—No sample pretreatment necessary (except degassing)

—Straight-forward operation requiring no special analytical skills

—Low cost of analysis relative to a large number of results

—Smart features: autocleaning, autocalibration

—Up to 10 sampling points possible

—Incorporated industrial panel PC with various remote access options

Analysis method
Determination of International Bitterness Units
conform with ASBC MOA / Beer bitterness and EBC Analytica method 9.8

Measuring ranges
0 – 60 IBU
Other ranges on request.

Cycle time
12 minutes (without degassing)

Factory calibrated (1-point)
Additional manual calibration possible by extra reference sample sets

Automatic, free adjustable sequence

Parameters: EBU, IBU

Product type: Process analyzers, Water analyzers

Measuring technology: Colorimetry

Type of application process: Beer brewing

Industries: Food & Beverage