scholarly journals PENETAPAN KADAR FENOL TOTAL DAN KATEKIN DAUN TEH HITAM DAN EKSTRAK ASETON TEH HITAM DARI TANAMAN CAMELLIA SINENSIS VAR. ASSAMICA

Jurnal Kimia ◽  
2020 ◽  
pp. 43
Author(s):  
N. L. P. V. Paramita ◽  
N. P. T. W. Andari ◽  
N. M. D. Andani ◽  
N. M. P. Susanti
Keyword(s):  
Camellia Sinensis ◽  
Black Tea ◽  
Acetone Extract ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Phenol Content ◽  
Tea Leaves ◽  
Tea Leaf ◽  
Acetone Extracts

Indonesia is quite well known as one of the countries that has tea plantations and uses its own production of tea. As a tea producing country, Indonesia has been able as a tea exporter. The most tea production in Indonesia is black tea product. Black tea products are produced from species Camellia sinensis Var. Assamica which undergoes an enzymatic oxidation process to fresh tea leaves. The most phenolic compounds contained in the black tea leaf are catechins, theaflavins, and thearubigin. The purpose of this study was to determine the phenolic total and catechin content of black tea products and acetone extracts produced by D'wan Tea (DT) and Bali Cahaya Amertha (BCA) plantations which located in Tabanan district, Bali. Determination of total phenol was carried out on black tea leaf products and acetone extract using the Folin-Ciocalteu method compared with gallic acid standards. Determination of catechin content was performed on fresh (before oxidized) tea leaves, black tea leaf products, and acetone extracts using the UV-Vis Spectrophotometry method at a maximum wavelength of 257 nm. The results showed that total phenol content of D'wan Tea black tea products (SDT) and Bali Cahaya Amerta (SBCA) were 1.50 ± 0.02 % mg GAE/g dan 0.97 ± 0.02 % mg GAE/g, respectively. Results of the total phenol content of D'Awan Tea (EADT) black tea acetone extract was 6.92 ± 0.12 % mg GAE/g, while the Bali Cahaya Amerta (EABCA) black tea acetone extract was 7.38 ± 0.07 % mg GAE/g. Catechin content from fresh leaf samples of D'wan Tea (SSDT), SDT, and EADT were 15.30 ± 0.22 % mg/g, 8.37 ± 0.13 % mg/g, and 37.45 ± 0.74 % mg/g. Catechin content of fresh leaf samples of Bali Cahaya Amerta (SSBCA), SBCA, and EABCA were 14.71 ± 0.28 % mg/g, 15.16 ± 0.58 % mg/g, and 35.66 ± 0.89 % mg/g. Total phenol content of DT black tea products is greater than BCA black tea products. DT black tea products appear to have decreased catechins in processing. In the processing of black tea it is necessary to decrease catechins content due to the formation of catechin polymers, namely theaflavin and thearubigin as a determinant of the quality of black tea.   Keywords: black tea, Camellia Sinensis, cathecin, total phenol.

scholarly journals An opto-electronic system for in-situ determination of peroxide value and total phenol content in olive oil

2015 ◽  
Vol 146 ◽  
pp. 1-7 ◽  
Author(s):  
Marco Grossi ◽  
Giuseppe Di Lecce ◽  
Marco Arru ◽  
Tullia Gallina Toschi ◽  
Bruno Riccò
Keyword(s):  
Olive Oil ◽  
Peroxide Value ◽  
Electronic System ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Phenol Content

scholarly journals Antioxidant Activity of Ketapang Leaf Tea (Terminalia catappa)

2021 ◽  
Vol 4 (2) ◽  
pp. 220-227
Author(s):  
Retno Widyastuti ◽  
Agustina Intan Niken Tari ◽  
Novian Wely Asmoro
Keyword(s):  
Antioxidant Activity ◽  
Water Content ◽  
Leaf Age ◽  
Black Tea ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Phenol Content ◽  
Terminalia Catappa ◽  
Young Leaves

The purpose of this study was to determine the antioxidant activity of fermented tea (black tea) with Ketapang leaves (Terminalia catappa) using two variations of leaf age, namely leaflets 1-3 and 4-5. The parameters observed were water content, pH, antioxidant activity (IC 50) and total phenol content of tea. Results showed that the antioxidant activity of young leaves (shoots 1-3) significantly higher than old leaves (shoots 4-5) but had lower total phenol and pH. In general, the character of Ketapang leaf tea products at shoots 1-5 has water content ranging from 5.55-5.58%, total phenol content of 22.63-28.97 mg / g EAG, and antioxidant activity (IC 50) of 6.27-6 .71 µg/ml and the pH of steeping water from 5.9 to 6.1. 

scholarly journals FORMULATION OF LOTION FROM BLACK TEA EXTRACT (CAMELLIA SINENSIS LINNAEUS) AS SUNSCREEN

2019 ◽  
Vol 11 (1) ◽  
pp. 205 ◽  
Author(s):  
Iyan Sopyan ◽  
Riestya Dwi Permata ◽  
Dolih Gozali ◽  
Insan Sunan Kurniawan Syah
Keyword(s):  
Camellia Sinensis ◽  
Black Tea ◽  
Ultraviolet Rays ◽  
Tea Leaves ◽  
Security Testing ◽  
Black Tea Extract ◽  
Emulsifying Agent ◽  
Irritation Test ◽  
Tea Extract ◽  
Tea Leaf

Objective: The goal of the project was to explore extracts from black tea leaves (Camellia sinensis Linnaeus) to prove it can give protection against ultraviolet rays (UV) in lotion preparation.Methods: Black tea extract was made in sunscreen lotion in oil in water (O/W) type emulsion using a combination of PEG-8 and beeswax as emulsifying agent 1, and combination of cetyl alcohol, ceteth-20, and steareth-20 as emulsifying agent 2. Evaluation of lotion including phytochemical screening of black tea leaf extract, measurement of sun protecting factor (SPF) value of extract black tea leaves, measurement of SPF preparation lotion sunscreen extract black tea leaves, physical observation of preparation, qualitative preparation evaluation using thin layer chromatography (TLC) and lotion security testing have been done to ensure the quality of lotions.Results: The result exhibited the effective SPF that was different to the sunscreen lotion F1, which contained 0.03% w/v and F2 which contain of 0.04% w/v black tea leaves extract with the point of SPF is 20.31 and 24.71 respectively. Both formulas fulfilled the requirements as lotion preparations and did not irritate the skin based on an irritation test on 20 volunteers.Conclusion: Formulas F1 and F2 can be applied as a sunscreen with good physical quality and is safe for topical use in lotion preparation.

scholarly journals Rendemen Dan Total Fenolik Santan Kelapa Dalam Pada Berbagai Tingkat Kematangan

Jurnal MIPA ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 44
Author(s):  
Chivon Lerebulan ◽  
Fety Fatimah ◽  
Julius Pontoh
Keyword(s):  
Old Age ◽  
Total Phenol ◽  
Coconut Milk ◽  
Total Phenolic ◽  
Total Phenol Content ◽  
Phenol Content ◽  
Coconut Meat

Telah dilakukan penelitian untuk menentukan rendemen santan dan total fenolik santan kelapa dalam pada berbagai tingkat kematangan. Santan kelapa dibuat dengan cara kelapa dikupas, dibuang kulit coklat yang menempel pada daging kelapa, selanjutnya daging kelapa diparut, ditimbang, diperas, dan disaring. Penentuan kandungan total fenol menggunakan metode Folin-Ciocalteu. Dari hasil pengujian menunjukkan rendemen santan kelapa dalam tua merupakan nilai yang paling tertinggi sebesar 28.57 g/mL dan total nilai fenolik yang tertinggi terdapat pada santan kelapa dalam tua sebesar 143.9 mg/kg.Research has been conducted to determine coconut content and total phenolic from coconut milk in various level of maturity. Coconut milk made by coconut peeled, discarded brown skin attached to coconut meat, then coconut meat grated, weighed, squeezed, and filtered. Determination of total phenol content using Folin-Ciocalteu method. The results showed that coconut milk content in the oldest was the highest value of 28.57 g / mL and the highest total phenolic value was found in coconut milk in old age of 143.9 mg / kg.

Evaluation of virgin olive oil bitterness by total phenol content analysis

2007 ◽  
Vol 109 (3) ◽  
pp. 193-197 ◽  
Author(s):  
Gabriel Beltrán ◽  
María T. Ruano ◽  
Antonio Jiménez ◽  
Marino Uceda ◽  
María P. Aguilera
Keyword(s):  
Content Analysis ◽  
Olive Oil ◽  
Virgin Olive Oil ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Phenol Content
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