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Zuhairiah Nasution
Program Studi D3 ANAFARMA, Universitas Sari Mutiara Indonesia
Medicine & Pharmacology

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PENETAPAN KADAR VITAMIN C PADA DAUN JELATANG (Urtica dioica L.) DENGAN MENGGUNAKAN SPEKTROFOTOMETRI ULTRAVIOLET Zuhairiah Nasution; Siti Nurbaya; Supartiningsih Supartiningsih; Tiurma Sitompul
Jurnal Farmanesia Vol 4 No 2 (2017): Jurnal Farmanesia
Publisher : UNIVERSITAS SARI MUTIARA INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (392.499 KB) | DOI: 10.51544/jf.v4i2.2709

Abstract

Nettle leaf (Urtica dioica L) is the most widely known species in the genus Urtica and has many benefits for the community, one of which is to treat venereal diseases, kidney disorders, allergies, diabetes, anemia, and digestive tract diseases. Vitamins contained in nettle leaves that are useful for the body is vitamin C. Vitamin C has properties that are easily damaged by heat, and easily soluble in water. This study aims to determine the levels of vitamin C in young and old nettle leaves by an ultraviolet spectrophotometric method using Aquadest solvent and read a wavelength of 265 nm with a linear regression equation y= ax + b with a value of y= 0.0525 + 0.0618 with r = 0.9878 each treatment was replicated 6 times. Based on the results of the qualitative test experiment, it was stated that in nettle leaves there was vitamin C with iodine solution reagent, FeCl3, Fehling A&B, and obtained vitamin C levels in old nettle leaves 0.2526 mg/g and in young nettle leaves 0.2026 mg/g. So that the levels of vitamin C in old nettle leaves are higher than in young nettle leaves.
PENETAPAN KADAR FLAVONOID TOTAL EKSTRAK ETANOL JERAMI NANGKA (Artocarpus heterophyllus) SECARA SPEKTROFOTOMETRI-Visible Jon Kennedy Marpaung; Zuhairiah Nasution; Cut Masyithah Thaib; Junisan Siringoringo
Jurnal Farmanesia Vol 7 No 1 (2020): Jurnal Farmanesia
Publisher : UNIVERSITAS SARI MUTIARA INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (613.916 KB)

Abstract

Flavonoids are compounds consisting of 15 carbon atoms which are generally distributed in the plant world. Flavonoid compounds are a group of the largest phenolic compounds found in nature, these compounds are red, purple, and blue dyes as well as yellow dyes found in plants. This study aims to determine the total flavonoid content of the jackfruit straw ethanol extract by using the UV-VIS spectrophotometric method, this study includes sample preparation, simplicia phytochemical screening, and extract manufacture, then determine the total flavonoid content of the jackfruit straw ethanol extract which is equivalent to quercetin (Quercetin). Equivalent (QE)) using aluminum chloride reagent with a wavelength of 437 nm by Visible spectrophotometry. Based on the research conducted, the total flavonoid content of jackfruit straw extract determined by Visible spectrophotometry using aluminum chloride reagent was 114.7590± 52.1263 mg QE/g extract.
PENETAPAN KADAR FLAVONOID TOTAL EKSTRAK ETANOL JERAMI NANGKA (Artocarpus heterophyllus) SECARA SPEKTROFOTOMETRI-Visible Jon Kennedy Marpaung; Zuhairiah Nasution; Cut Masyithah Thaib; Junisan Siringoringo
Jurnal Farmanesia Vol 7 No 1 (2020): Jurnal Farmanesia
Publisher : UNIVERSITAS SARI MUTIARA INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/jf.v7i1.2766

Abstract

Flavonoids are compounds consisting of 15 carbon atoms which are generally distributed in the plant world. Flavonoid compounds are a group of the largest phenolic compounds found in nature, these compounds are red, purple, and blue dyes as well as yellow dyes found in plants. This study aims to determine the total flavonoid content of the jackfruit straw ethanol extract by using the UV-VIS spectrophotometric method, this study includes sample preparation, simplicia phytochemical screening, and extract manufacture, then determine the total flavonoid content of the jackfruit straw ethanol extract which is equivalent to quercetin (Quercetin). Equivalent (QE)) using aluminum chloride reagent with a wavelength of 437 nm by Visible spectrophotometry. Based on the research conducted, the total flavonoid content of jackfruit straw extract determined by Visible spectrophotometry using aluminum chloride reagent was 114.7590± 52.1263 mg QE/g extract.
Co-Authors Cut Masyithah Thaib Jon Kennedy Marpaung Junisan Siringoringo Siti Nurbaya Supartiningsih Supartiningsih Tiurma Sitompul