| dc.description.abstract | Indonesia's geographical location supports the existence of various coffee
commodities. As a plantation commodity, coffee has a high economic value. Coffee has a lot of
substance that is beneficial to the body, one of is caffeine that serve to increase the stamina.
Caffeine is naturally present in many types of plants as secondary metabolism. This research was
done to know the content of caffeine in a local Arabica pure coffee with their variation of roasted
temperatures. Coffee roasting is a stage of processing coffee beans into ready to grind, which
can produce variations in the taste and content of coffee. The roasting process uses a roasting
machine that automatically adjusts the roast temperature. Variations of roasted coffee are ground
and used as a solution to determine the caffeine content. The determination of the coffee content
is carried out using the spectrophotometric method, which measures the absorbance of caffeine
in solution when it is passed by electromagnetic waves in the UV-Vis spectrum. The test results
showed that the highest caffeine content was on samples of pure Arabica coffee with a roasted
temperature of 195°C to 215°C with five levels of coffee roast. Caffeine content in sequential
3.217% and 2.597%. | en_US |
