Analysis of caffeine in coffee espresso caffeine content in espresso and American coffee
When it comes to coffee, there is no doubt that "caffeine" is a sensitive word for many people. Coffee can boost your spirits, but you need the right amount, because too much caffeine can be harmful to the body, so let's talk about it today.
Caffeine is a xanthine alkaloid compound, which is a kind of stimulant.
Chemical formula: C8H10N4O2 (trimethylxanthine)
Function: 1. Natural insecticide: found in the fruits, leaves, and seeds of more than 60 plants, insects can cause paralysis and achieve insecticidal effect after eating these plants.
two。 Central nervous system stimulant: can temporarily dispel drowsiness and restore physical strength. Widely used in drinks and medicines for refreshing and relieving fatigue.
Caffeine is widely used in daily life, coffee, chocolate, cocoa, tea all contain caffeine, although its name may be different, and its nature is not different. There are many people who get into the habit of drinking coffee but do not quite understand the relationship between coffee and caffeine. Here is a simple classification for reference:
1. Different varieties lead to a variety of caffeine content: generally speaking, Arabica, which belongs to boutique coffee, contains less caffeine, accounting for only about 1.2%, while Robusta sturdy beans have a relatively high caffeine content of about 2.4% or about 2.4%.
two。 The temperature and time of baking lead to different caffeine content: roasting destroys the cells of coffee cherries, and the higher the temperature and the longer the roasting time, the lower the caffeine content in coffee cherries. As a result, deep-roasted coffee beans may contain less caffeine than light roasting.
3. The way and time of brewing leads to the release of caffeine: there are many different ways of brewing coffee, and the time of brewing is also different. When coffee powder and hot water dissolve, caffeine is released, and the longer it takes to brew, the more caffeine is released, so fast-brewing espresso (Espresso) contains less caffeine than hand-brewed and siphon coffee. It is recommended that adults drink 2 cups of coffee a day, as long as they do not drink too much, there will be no health effects!
Original: http://blog.sina.com.cn/u/3548109651
Source: coffee West Point training
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