Tagged: aroma chemistry

The Stem Concentrates Floral Compounds the Leaf Does Not

A 2025 tissue-level study found oolong's stem holds more of the compounds behind its floral scent than the leaf beside it. A 2022 study found adding stem to the blend lowers one of those same compounds in the finished tea. Neither team was answering the other's question, and nobody has reconciled the two.

A Rainy Pick Day Caps a Rock Tea's Aroma, and No Roast Recovers It

A 2025 GC-MS study found rainy-day-picked Wuyi rock tea carries 40 to 74 percent less floral and fruity aroma compound than sunny-day leaf, and processing cannot fully make up the deficit.

The Old Rule About Spring and Autumn Tea, Tested Against 266 Cups

Anxi trade wisdom credits spring Tieguanyin with the fuller cup and autumn with the better scent. A 2025 study of 266 finished teas checked the chemistry, and found the saying right about direction and nearly silent about how much a buyer should let it decide.