Antioxidant activity, phenol total, and flavonoid total of green tea (Camellia sinensis (L.) O. Kuntze) from three West Java tea estate

Abstract

Green tea has bioactive component, it is polyphenol which has strong antioxidant. As the largest component of polyphenol, flavonoid is very effective as an antioxidant. The purpose of this study was to determine antioxidant activity, phenol total and flavonoid total in green tea from three different estates, they were Cikajang Kab. Garut, Taraju Kab. Tasikmalaya, and Ciwidey Kab. Bandung. The results of this study show that seven samples have good antioxidant activity, but green tea which came from Cikajang (P-IRT No. 810320501698) has the highest IC50 grade it was 21,44 μg/ml. Beside that samples from Cikajang (P-IRT No. 810320501698) has highest total phenol content it was 334,68± SD 0,89/100 g samples and also has the highest total flavonoid it was 0,34 mg Kuersetin/g samples ± SD 0,21. On the contrary, green tea which has the lowest IC50 grade came from Taraju, the grade was 28,03 μg/ml, the samples has the lowest total phenol content it was 208,91± SD 4,47 mgGAE/100 g, and also has the lowest total flavonoid it was 0,207 mg Kuersetin/g samples ± SD 0,00.

The effect of different sweeteners on the free radical scavenging activities, alcohol contents, sugar reductions, and hedonic properties of green tea kombucha

“…The maximum wavelength, sample, and standard solution were prepared using Kusmiyati and Sudaryat's (2015) methods with slight modifications 21 . The DPPH radical activity was determined using the spectrophotometric method and the synthetic radical DPPH (2,2-Diphenyl-1-picrylhydrazyl).…”

Analisis Fenol dan Flavonoid Total Pada Beberapa Teh Putih (Camellia sinensis L.) yang Beredar di Pasaran

“…Penentuan kadar flavonoid total teh putih menggunakan prosedur yang dilakukan Kusmiyati et al (2015), dimana dibuat kurva kalibrasi kuersetin (seri konsentrasi 2, 4, 6, 8, dan 10 μg/mL). Sebanyak 1,5 mL etanol 96%, 0,1 mL aluminium (III) klorida 10%, 0,1 mL natrium asetat 1 M dan 2,8 mL akuades ditambahkan ke dalam 0,5 mL larutan dengan berbagai konsentrasi pembanding, kemudian diinkubasi selama 30 menit.…”

Pemanfaatan Teh Hijau (Camelia sinensis L.) Sebagai Bahan Baku Pasta Gigi Herbal Di Desa Talagasari Dan Sindangsari Kecamatan Kawali Ciamis

“…Polifenol dan katekin berfungsi dalam pencegahan pembentukan plak karena bersifat bakteriostatik yang bekerja merusak dinding sel bakteri dan membrane sitoplasma dan menyebabkan denaturasi protein (Lobiuc et al, 2023). Penelitian yang dilakukan oleh (Kusmiyati et al, 2016) menunjukkan hasil teh hijau memiliki efek antiinflamasi dan antikanker.…”