Perbandingan Kadar Kafein pada Jenis Kopi Hasil Perkebunan Bengkulu dengan Metode Spektrofotometri Ultraviolet

Abstract

Bengkulu is a province that is in the top five as a coffee producer in the archipelago. The survey proves that Bengkulu has a fairly large potential for producing coffee with many local coffee products from Bengkulu city plantations that are already circulating in the market. Caffeine is a type of alkaloid found in coffee beans, tea leaves, and cocoa beans. This study aims to determine the caffeine content of Bengkulu plantations (Rejang Lebong, Kepahiang, Seluma) using Ultraviolet Spectrophotometry. The results showed that the coffee samples at the Bengkulu Plantation contained caffeine with levels, namely: 0,00144 mg (Seluma coffee sample), 0,011928 mg (Rejang Lebong coffee sample), 0,019,144 mg (Kepahiang coffee sample). Of the three data, the highest plantation caffeine content was found in Kepahiang coffee.

Comparative Analysis of Caffeine Content in Cold and Hot Brewed Robusta Coffee Using High-Performance Liquid Chromatography (HPLC)

“…Both hot and cold brewed coffee samples were dissolved in 99% methanol, Parry's reagent, and 10% aqueous ammonia. A color change to dark blue or green indicates the presence of caffeine[21]. The Parry method was selected for its specific ability to identify caffeine.18 I. Rahmawati & S. H. Asrori, Comparative Analysis of Caffeine...........c. Caffeine ExtractionApproximately 1.5 g of calcium carbonate (CaCO₃) was added to 150 mL of each coffee sample, hot and cold brew.…”

Perancangan Antarmuka Pengguna Dan Pengalaman Pengguna Pada Website Besurek Coffee Dengan Metode Design Thinking

“…Provinsi Bengkulu merupakan salah satu dari lima provinsi di Indonesia yang aktif dalam produksi kopi. Selain itu, hasil penelitian menunjukkan potensi produksi kopi yang besar di wilayah ini, yang tercermin dalam beragam produk kopi lokal yang dihasilkan dan dijual di kota Bengkulu serta pasar lainnya (Mulyani et al, 2022).…”