Brewers face rising pressure to deliver consistent, high-quality products amid shifting ingredient sources, evolving consumer preferences, and growing scrutiny around contaminants and safety. Modern separation science now sits at the center of brewing quality control, giving teams clearer visibility into flavor chemistry, raw material variability, and emerging risks.
This Q&A with Paul Silcock, Director of Product Marketing & Applications, Analytical Instruments at Thermo Fisher Scientific, explores how advanced analytical tools shape today’s brewing operations and where the field may be heading.
What are the biggest quality and consistency challenges facing brewers today, particularly craft breweries?
Brewing depends on complex biological and chemical processes, and even small changes in ingredients, water chemistry, or processing conditions can shift flavor, aroma, and mouthfeel. Lot-to-lot variability, supplier differences, and environmental factors introduce additional uncertainty. Advanced analytical tools help breweries build chemical fingerprints of their products, track deviations across batches or suppliers, and maintain target profiles even as raw materials change.
Breweries are also under increased pressure to monitor contaminants such as PFAS, which are becoming increasingly regulated. High-resolution accurate mass spectrometry (HRAM) and chromatography allow teams to detect these compounds at trace levels and address issues before they affect product quality or safety. Analytical tools also help identify compounds like diacetyl, which can create unwanted buttery notes, enabling timely adjustments during fermentation. As newer styles like hazy IPAs and alcohol-free beers grow in popularity, modern mass spectrometry and chromatography support experimentation and control over new ingredients and fermentation strategies.
Why is in-house testing important for breweries compared with outsourcing analyses?
In-house testing gives breweries immediate access to data, enabling teams to intervene during production rather than wait for external results. Because brewing chemistry changes over time, delays can lead to missed opportunities to correct a batch—or in some cases, the loss of an entire tank. Real-time visibility improves accuracy, accelerates decision-making, and reduces waste. It also eliminates the risk of sample degradation or contamination associated with shipping to off-site laboratories.
Which separation science techniques are most valuable for monitoring beer quality, and why?
No single technique captures the full chemical complexity of beer, so breweries rely on complementary methods. Gas chromatography (GC) and GC–mass spectrometry (GC-MS) characterize volatile aroma compounds, while high-performance liquid chromatography (HPLC) detects non-volatile flavor and stability markers. Ion chromatography (IC) assesses the composition of organic acids and water, and inductively coupled plasma mass spectrometry (ICP-MS) identifies trace metals and inorganic contaminants. When combined with HRAM, some of these techniques deliver deeper chemical insight and stronger quality control. Many breweries consolidate methods to run wider compound panels on a single LC or GC system, increasing efficiency for smaller teams.
How are these techniques applied in practice for monitoring key flavor compounds, contaminants, or spoilage risks?
Breweries use GC-MS, LC-MS, and ICP-MS to screen for off-flavors, spoilage indicators, and contaminants. PFAS has become a significant focus as regulatory authorities, such as the Environmental Protection Agency (EPA), tighten regulations and new studies highlight its presence in commercial beers. Analytical results often feed into release dashboards that integrate measurements from multiple techniques, helping teams identify issues early, validate raw materials, and time interventions throughout the brewing process.
What impact does method consolidation have on time, cost, and efficiency in the lab?
Method consolidation allows teams to measure more compounds in fewer runs, reducing labor, instrument time, and overall cost. Broader LC or GC assays increase throughput and streamline workflows, which is especially valuable for breweries with smaller quality departments.
What role does separation science play alongside sensory panels in ensuring product quality?
Sensory panels remain essential but exhibit natural variability due to individual perceptions and experiences. Separation science provides objective chemical markers that anchor sensory impressions, creating a consistent reference point for flavor and aroma evaluation. By translating sensory descriptors into measurable signals, breweries can track changes more precisely and correct drift in flavor profiles over time, even when ingredients or processing conditions shift.
Are there emerging concerns, such as smoke taint or off-flavor compounds, that separation science is helping address?
Environmental events such as wildfires can introduce smoke-derived phenols that affect malt and hops. GC-MS techniques detect these volatile compounds before they appear in finished beer. Pairing chromatography with HRAM also enables breweries to build detailed chemical fingerprints, helping teams identify subtle off-flavor precursors early in the process. As climate impacts raw materials more dramatically, this level of monitoring becomes increasingly important.
What separation science advances will impact brewing QC/product development, and what advice do you have for breweries considering these tools?
Advances in chromatography and HRAM are making comprehensive chemical profiling more accessible. These technologies help breweries analyze ingredients, track process performance, and maintain year-over-year consistency despite changing environmental and supply-chain conditions. They also support broader contaminant control, including emerging risks like PFAS.
Breweries exploring these tools should start with the measurements that guide immediate decisions—such as bitterness, haze, and key water ions—then add GC, LC, IC, and MS capabilities as their analytical needs expand. Using complementary techniques spans a broader range of the chemical space and provides the level of understanding needed to refine products, strengthen quality control, and protect brand reputation.