UJI FLAVONOID, AKTIVITAS ANTIOKSIDAN, SERTA KEAMANAN TEH DAUN UNGU (Graptophyllum pictum (L.) Griff.) DAN KULIT NANAS VARIAN QUEEN (Ananas comosus (L.) Merr.) SEBAGAI MINUMAN FUNGSIONAL DENGAN POTENSI ANTIOKSIDAN

Hosianna Stephany Aritonang, . (2026) UJI FLAVONOID, AKTIVITAS ANTIOKSIDAN, SERTA KEAMANAN TEH DAUN UNGU (Graptophyllum pictum (L.) Griff.) DAN KULIT NANAS VARIAN QUEEN (Ananas comosus (L.) Merr.) SEBAGAI MINUMAN FUNGSIONAL DENGAN POTENSI ANTIOKSIDAN. Skripsi thesis, Universitas Pembangunan Nasional Veteran Jakarta.

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Abstract

Objective: Ischemic stroke remains a leading cause of morbidity and mortality worldwide. This study aimed to evaluate the flavonoid content, antioxidant activity, and safety profile of tea formulated from purple leaves (Graptophyllum pictum) and pineapple peel (Ananas comosus) as a potential functional beverage with neuroprotective properties. Methods: Purple leaves and pineapple peel were oven-dried at 50-60℃ for 48h. Flavonoid levels were quantified, antioxidant activity was assessed using the DPPH assay, and product safety was examined through heavy metal contamination tests, microbiological analysis, and FTIR spectroscopy for microplastic detection. Results: Run 8 yielded the highest flavonoid concentration at 5.65 mg QE/g DW, alongside the strongest antioxidant activity at 46.00 µmol TE/g DW. Heavy metal levels were within acceptable limits, whereas microbial contamination exceeded BPOM requirements. FTIR analysis revealed no functional groups indicative of the presence of microplastics. Conclusion: Tea derived from purple leaves and pineapple peel demonstrates notable bioactive content and strong antioxidant capacity. However, improvements in microbiological safety are required before further development as a functional beverage.

Item Type: Thesis (Skripsi)
Additional Information: [No. Panggil: 2210211227] [Pembimbing 1: Feda Anisah Makkiyah] [Pembimbing 2: Maria Selvester Thadeus] [Penguji: Yanti Harjono Hadiwiardjo]
Uncontrolled Keywords: ischemic stroke, Graptophyllum pictum, Ananas comosus, flavonoids, antioxidant activity, functional beverage
Subjects: R Medicine > R Medicine (General)
R Medicine > RZ Other systems of medicine
Divisions: Fakultas Kedokteran > Program Studi Kedokteran (S1)
Depositing User: HOSIANNA STEPHANY ARITONANG
Date Deposited: 07 May 2026 04:55
Last Modified: 07 May 2026 04:55
URI: http://repository.upnvj.ac.id/id/eprint/50302

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