Abstract
Black tea is a tea that is currently the most widely consumed by the people of Indonesia. Consumption of black tea more than two cups per day can affect in human healthy because tea contains 20-90 mg of caffeine per cup, while the maximum consumption of caffeine is 150 mg per day and the maximum limit of caffeine is 0.02% in food and beverages. The method used in this study is the method of soxhlet extraction by varying the ethyl alcohol as solvent are 10%, 20%, 30%, 40%, and 50% with 2.5 hours extraction time. The initial caffeine content in black tea samples was 3.97%, after extraction decreased significantly levels of caffeine on 50% ethyl alcohol concentration is 0,0199%. The extraction method using Soxhlet technique is very effective to reduce caffeine in black tea.
Highlights
Abstrak—Teh hitam merupakan teh yang saat ini paling banyak dikonsumsi oleh masyarakat Indonesia
the most widely consumed by the people of Indonesia
more than two cups per day can affect in human
Summary
Teh hitam yang dikenal dengan Camellia sinensis merupakan tanaman yang paling banyak dikonsumsi sebagai minuman. Kandungan kafein pada teh dalam 100 gram terdapat 2,5-4,5% kafein atau kandungan kafein berkisar 20-90 mg khusus pada teh hitam [3] atau sekitar 8-11% berat kering untuk 40 mg kafein per 235 ml cangkir [4]. Akan tetapi jika dimanfaatkan dengan kadar yang sesuai maka kafein berguna untuk anti hipertensi, anti inflamasi, anti obesitas, hypocholesterolemic, dan anti diabetes [8]. Kafein (1,3,5-trimethylxanthine) dalam bentuk murni sebagai kristal putih, memiliki massa molar 194,19 gram/mol, mudah larut dalam air dan dalam banyak pelarut organik dan meleleh pada suhu 2340C-2390C [9]. Penilitian ini melakukan metode ekstraksi dalam menurunkan kadar kafein pada teh hitam dengan menentukan konsentrasi pelarut etil alkohol yang paling efektif
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