ARTICLE
TITLE

Quantitative Analysis of Caffeine Levels in Local Coffee (Coffea sp) Powder on Dabo Island with UV-Vis Spectrophotometry

SUMMARY

Coffee (Coffea sp) is the second-largest beverage consumed by people around the world whose process comes from the processing and extraction of coffee beans. Coffee has a chemical compound, one of which is caffeine. Caffeine is a crystal-shaped compound. Caffeine can be a tangible white powder or a shiny white needle-shaped, odorless caffeine, and caffeine has a bitter taste. The purpose of the study was to determine the caffeine levels of local ground coffee on the island of Dabo with the spectrophotometry UV-Vis method. Analysis of the ground coffee caffeine levels is quantitative determined using spectrophotometry UV-Vis. The equation of the calibration curve of caffeine is regression y = 0.1307x + 0.0112 with a correlation coefficient value (r) of 0.9993. Based on Indonesian National Standards (SNI) 01-7152-2006, The maximum limit of caffeine in foods and beverages is 150 mg/day and 50 mg/serving. The results of the analysis of caffeine levels from three samples of ground coffee circulating on Dabo Island each in 2 g were 0.3383 mg for Sample A; 0.3786 mg for Sample B; and 0.5803 mg for Sample C.

 Articles related

Yusuf Hanafi Lubis,Ivena Hotmarina Septiani Nainggolan,Linda Mutiara Harahap,Risna Risna,Sashi Pangestuty    

Objective: To identify the impact of bullying behavior on the mental health of students who are victims of bullying.Methods: This was a cross-sectional descriptive quantitative study on 105 students in Medan Perjuangan district from November - December 2... see more


Ikhwan Ikhwan,Musparlin Halid    

Filling a system document of the medical record is a system of using to arrange a bundle of the medical record in share of filing. The research intends to analyze different time rapidity of supplying the Medical Record Document (MRD) manner take care of ... see more


Sri Gustini Husein, Melvia Sundalian, Nurul Husna    

Purslanes are medicinal plants from the Portulacaceae family which has more than 100 species, including Portulaca oleraceae L. and Portulaca grandiflora Hook. Both types of purslanes have the potential to become natural medicines due to the presence of a... see more



Introduction; The development and improvement of the quality of posyandu services is strongly influenced by the participation of the community, including cadres. Objectives; knowing the factor analysis of cadre activity in posyandu activities. Method; qu... see more



Introduction; HIV is the main cause of the decline in the secondary immune system, which gradually leads to the AIDS stage. HIV and AIDS are pandemic, attacking millions of people in the world, men, women, and even children, so it is necessary to take st... see more