Assaying beer involves various methods to ensure its quality, safety, and consistency. Here are some key aspects of beer assays:
pH Levels: Monitoring pH to maintain the desired acidity and stability2.
Microbial Detection:
- PCR-Based Assays: Techniques like VERIFLOW® use Polymerase Chain Reaction (PCR) to detect spoilage organisms such as Lactobacillus and Pediococcus12. These assays are highly sensitive and can identify hop-resistant bacteria that traditional methods might miss2.
Quality Control:
- Contamination Prevention: Regular testing for contaminants like wild yeast (e.g., Brettanomyces) and lactic acid bacteria is crucial2. These organisms can cause off-flavors and spoilage if not detected early2.
Oxidation Testing:
- Electron Paramagnetic Resonance (EPR) Spectroscopy: This method measures free radical production during forced oxidation assays, helping to assess the oxidative stability of beer3.
Sensory Analysis:
- Taste and Aroma: Sensory panels evaluate the beer’s taste, aroma, and mouthfeel to ensure it meets the desired profile2.
Chemical Analysis:
- Alcohol Content: Determining the alcohol by volume (ABV) to ensure consistency with labelling.
- pH Levels: Monitoring pH to maintain the desired acidity and stability2.
