FaST : Jurnal Sains dan Teknologi
Vol 5, No 2 (2021): NOVEMBER

KARAKTERISTIK FISIKOKIMIA TEH HITAM HERBAL DAUN JAMBU BIJI YANG DITAMBAHKAN DENGAN SARI JERUK NIPIS DAN Eucalyptus globulus [PHYSICOCHEMICAL CHARACTERISTICS OF GUAVA LEAF HERBAL TEA WITH ADDED LIME JUICE AND Eucalyptus globulus]

Yuniwaty Halim (Universitas Pelita Harapan)
Fellia Evelyn (Universitas Pelita Harapan)
Dela Rosa (Universitas Pelita Harapan)



Article Info

Publish Date
30 Nov 2021

Abstract

Guava leaves can be utilized as herbal tea because it contains bioactive compounds. In this research, guava leaf herbal tea was prepared according to black tea making process. Guava leaf herbal tea tends to have an astringent taste, therefore lime juice and Eucalyptus globulus were added to improve the sensory characteristics. The purpose of this study was to determine the best brewing temperature and time, and the effect of lime juice concentration and E. globulus essential oil on physicochemical and sensory properties of guava leaf herbal tea. In the first stage research, guava leaf herbal tea was brewed at different temperature (70, 80, 90oC) and time (5, 10, 15 minutes). The selected brewing temperature and time was 90oC for 10 minutes, with antioxidant activity (IC50) of 4372.22±54.71 ppm, total phenolic of 292.88±8.35 mg GAE/L, total flavonoids of 80.83±1.61 mg QE/L, and condensed tannin of 543.10 ±38.68 mg CE/L. In the second research stage, guava leaf herbal tea was prepared with the addition of lime (1, 2, 3%) and E. globulus (0,05, 0,10, 0,15%). When compared to herbal teas without the addition of lime and E. globulus, guava leaf herbal tea with addition of 3% lime and 0,15% E. globulus has lower antioxidant activity (IC50) of 10199.18±289.35 ppm, total phenolic of 303.12±19.70 mg GAE/L, total flavonoids of 78.20±3.52 mg QE/L, and condensed tannins of 362.40±12.40 mg CE/L. However, addition of lime and E. globulus to the guava leaf herbal tea increased the panelists' preference in terms of color and astringency.BAHASA INDONESIA ABSTRAK:Daun jambu biji dapat dimanfaatkan menjadi teh herbal dikarenakan memiliki kandungan senyawa bioaktif. Pembuatan teh herbal daun jambu biji pada penelitian ini menggunakan proses pembuatan teh hitam. Teh herbal daun jambu biji cenderung memiliki rasa sepat sehingga ditambahkan sari jeruk nipis dan Eucalyptus globulus untuk meningkatkan karakteristik sensorinya. Tujuan dari penelitian ini adalah menentukan perlakuan suhu dan waktu penyeduhan terpilih, serta pengaruh penambahan konsentrasi sari jeruk nipis dan minyak esensial E. globulus terhadap karakteristik fisikokimia serta sensori teh herbal daun jambu biji. Penelitian tahap I dilakukan pembuatan daun teh jambu biji kering dan penyeduhan teh herbal daun jambu biji pada suhu (70, 80, 90oC) dan waktu penyeduhan (5, 10, 15 menit). Suhu dan waktu penyeduhan terpilih adalah suhu 90oC selama 10 menit, yang memiliki aktivitas antioksidan (IC50) sebesar 4372,22±54,71 ppm, total fenolik 292,88±8,35 mg GAE/L, total flavonoid 80,83±1,61 mg QE/L, dan kandungan tanin terkondensasi 543,10±38,68 mg CE/L. Pada penelitian tahap II, dilakukan pembuatan teh herbal daun jambu biji dengan penambahan konsentrasi jeruk nipis (1, 2, 3%) dan E. globulus (0,05, 0,10, 0,15%). Jika dibandingkan dengan teh herbal tanpa penambahan E. globulus dan jeruk nipis, teh herbal daun jambu biji dengan penambahan jeruk nipis 3% dan E. globulus 0,15% memiliki aktivitas antioksidan (IC50) yang lebih rendah, yaitu sebesar 10199,18±289,35 ppm, total fenolik 303,12±19,70 mg GAE/L, total flavonoid 78,20±3,52 mg QE/L, dan kandungan tanin terkondensasi 362,40±12,40 mg CE/L. Namun, penambahan jeruk nipis dan E. globulus pada teh herbal daun jambu biji meningkatkan tingkat kesukaan panelis terhadap warna dan rasa sepat.  

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Journal Info

Abbrev

FaSTJST

Publisher

Subject

Computer Science & IT Environmental Science

Description

Started in 2017, FaST publishes articles in the areas of science and technology, particularly in food technology, biology, electrical engineering, industrial engineering, mathematics and civil engineering. Articles are either reviews and/or research ...