Determination of total carbon dioxide in beer and soft drinks by gas diffusion and flow injection analysis
1995
Measuring Carbon Dioxide in Beer and Soft Drinks
publication
Evidence: moderate
Author Information
Author(s): Esbjörn Ljunggren, Bo Karlberg
Primary Institution: Stockholm University
Hypothesis
The composition of the acceptor stream for diffused carbon dioxide is critical for accurate measurement.
Conclusion
The study presents a reliable method for determining total carbon dioxide in beer and soft drinks using gas diffusion and flow injection analysis.
Supporting Evidence
- The study tested over 20 indicators to find the best one for measuring CO2.
- Bromocresol purple was selected as the most effective pH indicator.
- The method showed good agreement with traditional titration methods for CO2 measurement.
Takeaway
This study shows how to measure the amount of carbon dioxide in drinks like beer and soda using a special method that helps keep the measurements accurate.
Methodology
A gas diffusion FIA method was used, involving a silicone-rubber membrane and a pH indicator for detection.
Limitations
The method's accuracy can be affected by the sample's handling and the choice of pH indicator.
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