Does Starbucks drink more caffeine than Starbucks drip filter coffee?

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Why is the coarse ground coffee powder suitable for trickling filter-the common grinding thickness diagram of coffee powder

American Coffee > French filter Pot > siphon Pot > Mocha Pot > hand drip filter > Italian concentrate > Ice drip Coffee

one. Cafe Americano

The caffeine content of various brewing methods in caffeine cafes at the University of Florida found that the American coffee machine extracted the highest dose of caffeine, with a cup of 230cc American-style filter coffee having 115 Mel 200 mg. Han Huaizong, the author of several coffee books and a 30-year study of coffee, explains that this is because the American style takes as long as 5muri for 8 minutes, so it dissolves the most caffeine.

two. French filter kettle

Using the French filter kettle with the simplest operation method, the caffeine content is also high because the coffee powder has to be soaked in 85 Meli 92 degrees hot water for 4 minutes and needs to be stirred.

three. Siphon kettle

Siphon pots commonly used in China also have to go through the stirring process, but the extraction time is only 40 murmur60 seconds. Han Huaizong estimates that although the caffeine in the siphon pot is slightly less than that in the French filter pot, it is still higher than the manual drip filter coffee.

four. Mocha pot

Mocha pot uses high-pressure principle to brew coffee, boiling hot water quickly extract coffee powder, coffee and boiling water contact time is short, so although the taste is heavy, but the caffeine content is ordinary.

five. Hand drip filter

Hand drip filter coffee because the temperature in the brewing process continues to escape, and does not need to stir, so the caffeine dissolution content is not high.

six. Italian concentration

Italian espresso espresso extraction time is short, only about 20 30--60cc 30 seconds, and each coffee capacity is only 30--60cc, so although the taste is strong, but the caffeine content is less.

seven. Ice drop coffee

Many people intuitively believe that coffee powder should be soaked in water for an hour to several hours, and the amount of caffeine should be the most, but Ye Jiasheng, an associate professor in the Department of Catering and Travel Management at Tainan University of Science and Technology, found that because the temperature of the ice drop method is low, so the coffee content is the lowest of all brewing methods.

Is it okay to make drip filtration with Italian beans? What's the difference between American coffee and Italian coffee beans?