Ask Emma: What is hydrolysis?

Hi Emma, I keep hearing about this “hydrolysis” thing that happens during brewing, what is it? Can you explain the science behind hydrolysis? How is it different than extraction? Thanks, Brewed and confused in Baltimore *** Dear brewed and confused, I feel your pain! Brewing is one of the most complex yet under-researched topics in …

Decaffeination Processes: How do they make decaf coffee when the caffeine is in the bean?

Mental Floss recently posted a video answering a user-submitted question, “How do they make decaf coffee when the caffeine is in the bean?” Craig Benzine, “host/coffee connoisseur,” describes a method for decaffeinating coffee called “supercritical carbon dioxide decaffeination,” where green coffee beans are put in a pressure vessel and carbon dioxide is used as a …

Coffee Roasting Chemistry: Chlorogenic Acids

by Emma Sage, Coffee Science Manager, Specialty Coffee Association of America Chlorogenic Acids: Chemistry & Reality Coffee roasters and coffee-minded chemistry aficionados, myself included, often speak of chlorogenic acids (also known as caffeoylquinic acids or “CQAs”) in coffee. There may be hundreds of scientific studies published on these important constituents of coffee. However, what do we …

SCAA and European Coffee Brewing Center Renew Cooperation on Certified Home Brewer Program

The Specialty Coffee Association of America (SCAA) and the European Coffee Brewing Centre (ECBC) have announced their renewed cooperation on the coffee brewer certification program through a Memorandum of Understanding (MOU). The ECBC and SCAA are neutral trade organizations and therefore the ideal stakeholders in the coffee industry to serve as non-biased and reputable evaluators …