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Penetapan Kadar Flavonoid Ekstrak Air Buah Jambu Biji Merah (Psidium guajava Linn)

Eka Wisnu Kusuma - Personal Name; Aulia Nur Rahmawati - Personal Name; Dwi Saryanti - Personal Name;

Buah jambu biji merah (Psidium guajava Linn) memiliki kandungan metabolit sekunder yang melimpah, namun penentuan parameter ekstrak dengan pelarut air masih belum dilaksanakan. Penelitian ini bertujuan untuk mengetahui kadar flavonoid total dari ekstrak air buah jambu biji merah sebagai bagian kecil dari proses standarisasi ekstrak air buah jambu biji merah. Metode yang digunakan adalah metode Wilstater “cyanidin” untuk pengujian flavonoid secara kualitatif dan metode kolorimetri alumunium klorida (AlCl 3 ) untuk pengujian secara kuantitatif. Penentuan panjang gelombang maksimal, operating time, kurva baku kuersetin dan penetapan kadar flavonoid sampel dilaksanakan menggunakan spektrofotometer Uv-Vis. Hasil pengujian kualitatif menunjukkan terjadinya perubahan warna menjadi oranye kekuningan, sementara hasil pengujian kuantitatif menunjukkan bahwa kadar flavonoid ekstrak air buah jambu biji merah dapat diukur menggunakan kurva baku quercetin dengan panjang gelombang 350-500 dan operating time selama 30 menit Kesimpulan dari penelitian ini adalah ekstrak air buah jambu biji merah terdeteksi mengandung flavonoid dengan kadar sebesar 3,293±0,155 mgQE/g.


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: Jurnal Ilmiah Farmasi Vol 12 No.3., 2023
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Indonesia
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  • https://www.researchgate.net/publication/373844270_PENETAPAN_KADAR_FLAVONOID_EKSTRAK_AIR_BUAH_JAMBU_BIJI_MERAH_Psidium_guajava_Linn
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