Ever wonder how bottled drinks manage to taste exactly the same, batch after batch? It’s no accident. Behind the scenes, precision tools like FTIR technology are working hard to uphold consistency and quality at scale.
In the high-speed world of beverage production, every bottle must meet exacting standards for taste, appearance, and carbonation. Quality control must keep pace without slowing down production or risking consistency.
Maintaining carbonation quality is especially challenging. CO₂ purity, ingredient variability, and manual testing procedures often lead to delays, re-tests, or costly inconsistencies that compromise the final product and the consumer experience.
This article explores how FTIR technology is reshaping beverage quality assurance. From real-time gas analysis and case studies to cross-industry applications and specific tools offered by PAS, we’ll unpack FTIR’s growing role in modern bottling.
Why CO₂ Consistency Matters
Carbonated beverages rely on highly controlled CO₂ levels to meet flavour and mouthfeel expectations. Any deviation, even slight, can alter the drinking experience and lead to off-brand results.
Manual CO₂ testing methods are still common. However, they pose several limitations:
- Delayed results due to sample prep and lab testing
- Increased risk of human error or missed contaminants
- Inconsistencies across multiple production lines or facilities
Producers must also comply with strict standards, including those from the International Society of Beverage Technologists (ISBT) and the Beverage Council of Australia (BCA).
- Insight: Carbon dioxide is essential to carbonation, but how it behaves in beverages is surprisingly complex. Learn the science behind CO₂ solubility and stability in this article: Carbon Dioxide for Carbonated Beverages and Soft Drinks: How It Works
Enter FTIR Technology
Fourier Transform Infrared (FTIR) spectroscopy provides real-time gas analysis using light absorption patterns to identify specific molecules. It replaces multiple manual tests with one fast, accurate, and continuous system.
FTIR technology offers key advantages for bottlers:
- Detects CO₂ impurities like sulfur compounds and benzene
- Provides non-destructive testing without altering samples
- Supports continuous monitoring throughout the production line
- Reduces reliance on lab technicians for routine measurements
By using molecular “fingerprints” to identify and quantify gases, FTIR gives production teams a reliable, real-time view of CO₂ quality, ensuring greater accuracy, efficiency, and confidence in bottling operations.
- Insight: FTIR technology is not limited to beverage bottling. Its versatility supports many industries that demand reliable, non-destructive testing. One example is the global honey industry, where FTIR helps ensure authenticity and purity. Learn more: FTIR and the Global Honey Industry
Real Impact in the Field
A Coca-Cola facility in Londonderry, New Hampshire, faced common quality control challenges. CO₂ deliveries had to be manually tested, often taking up to an hour per truck to verify purity.
Testing delays created:
- Bottlenecks in production scheduling
- Extra pressure on lab staff to perform re-tests
- Opportunities for inconsistency or missed contaminants
To resolve this, the plant implemented a real-time FTIR-based CO₂ quality monitoring system. This enabled real-time, automated CO₂ quality monitoring and eliminated the need for slow, manual verification.
The results were immediate:
- Faster CO₂ truck turnaround times
- Fewer re-tests and reduced human error
- Higher confidence in product consistency and safety
This use case was covered in the July 2025 Food Engineering article, which offers an in-depth look at how FTIR technology enhances CO₂ quality control and improves carbonation testing procedures throughout the beverage production line.
Proven in the Lab: FTIR Alcohol Verification Case Study
FTIR spectroscopy has also proven valuable in verifying alcohol content across various liquor types. In a study conducted by JASCO, researchers demonstrated how FTIR accurately measured ethanol concentrations in wine, beer, and spirits without damaging samples.
The process involved scanning a small liquid sample using an ATR attachment, then generating an infrared spectrum to identify key absorption bands related to ethanol. Results showed strong correlation with traditional measurement methods, but with greater speed, ease, and repeatability.
This case highlights FTIR’s practical role in beverage quality assurance, especially for producers who require precise alcohol verification with minimal handling or sample preparation. Learn more here: Verification of Alcohol Concentration Using FTIR
FTIR: A Cross-Industry Powerhouse for Quality and Innovation
FTIR spectroscopy is increasingly becoming a cornerstone of quality assurance across the broader food and beverage industry. From verifying alcohol content to monitoring purity and safety, its versatility is proving invaluable on the production line.
One powerful application is Attenuated Total Reflectance FTIR (ATR-FTIR), which enables direct testing of samples without preparation. It’s helping food manufacturers verify authenticity, detect spoilage, and ensure product consistency. Read more here: ATR-FTIR in the Food and Beverage Industry
- Insight: FTIR is also driving innovation in sustainability-focused sectors. In the bioplastics industry, FTIR is being used to monitor soil emissions and degradation behaviour, offering a clearer view of environmental impact and performance. See how FTIR supports sustainable material research in this related article: Bioplastics, Australia, Soil Emissions and FTIR
Enabling Smarter, Scalable QA
For producers operating across multiple sites, FTIR delivers consistency that manual testing struggles to match. It brings standardisation to a complex, variable-laden process without adding operational burden.
Additional benefits of FTIR integration include:
- Automated generation of Certificates of Analysis (COAs)
- Trend dashboards that highlight potential issues early
- Reduced downtime due to early contaminant detection
As quality teams gain access to real-time data across production lines, they are better equipped to detect trends early, make timely adjustments, and prevent disruptions—ultimately strengthening consistency, safety, and long-term operational resilience.
- Insight: FTIR has a long and fascinating history rooted in scientific innovation. Its evolution from laboratory spectroscopy to frontline industrial applications highlights its unmatched flexibility and reliability. Dive deeper into the origins of FTIR in this historical overview: The History of FTIR
PAS FTIR Technologies
Portable Analytical Solutions offers a range of FTIR instruments that bring laboratory-grade analysis to the production floor. These technologies enable fast, non-destructive testing of solids, liquids, and gases in real time.
PAS’s FTIR spectrometers provide:
- High spectral resolution across a wide range of wavelengths
- Simultaneous multi-compound detection for rapid decision making
- Handheld and portable options for flexible, on-site use
- Faster analysis compared to traditional dispersive IR spectrometers
Common FTIR applications include:
- CO₂ and gas purity testing
- Polymer and coating identification
- Soil and mineral analysis
- Safety and degradation detection
- Quality control in manufacturing environments
Each FTIR system offered by PAS is built for specific use cases, helping users across industries select the right solution for their operational needs while supporting consistent, efficient, and accurate testing practices.
The Future of Beverage Bottling with FTIR Technology
As the beverage industry continues to evolve, precision and efficiency will be non-negotiable. FTIR systems align with these demands by improving quality control and supporting data-led decision making.
Forward-looking producers are adopting technologies that integrate seamlessly with their lines. By investing in FTIR, they ensure product quality is not just maintained, but continuously optimised.
If you have any questions about how FTIR can support your quality control processes or would like guidance on choosing the right solution, feel free to get in touch with the PAS team.
Sources:
International Society of Beverage Technologists (ISBT)