Craft beers is a growing industry in Puerto Rico. They are defined as beers that are produced in small amounts by small breweries. Ten local craft beers were evaluated and characterized as a group project for instrumental laboratory course. Iron, nickel and copper were measured in the beer by direct calibration and standard addition using an Atomic Absorption Spectrometer. Samples were measured without treatment and after digestion. These metals were selected because they are related to the flavor of the beer. Titration was used to estimate total acidity, which was then related to the beer bitterness. Refraction index was also measured and related to the alcohol content. Color was determined by UV-Visible spectrophotometer measuring absorbance at 430 nm. Results were compared with commercial beer from a larger local brewery.

Puerto Rican craft beer characterization

2019 Spring National Meeting

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