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All Journal KOVALEN: Jurnal Riset Kimia FLUIDA
Alfiana Adhitasari
Politeknik Negeri Bandung
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology

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Determination Of Optimum Drying Condition On Flavonoid Content Of Ficus Carica L. Leaves Using Tray Dryer Emma Hermawati; Yusmardhany Yusuf; Alfiana Adhitasari
Fluida Vol 16 No 1 (2023): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16i1.4401

Abstract

This research aims to find out the characteristics of Ficus carica L. drying process using a tray dryer and determine the effect of temperature and drying time on Ficus Carica L. flavonoid content using a tray dryer to obtain Ficus carica L. herbal leaf tea which is high in antioxidants. At the experimental stage, the water content of fresh leaves of Ficus carica L. were determined, so the water content is 74 ± 1.11% (wet base), then dried using a tray dryer at 35; 40; 45; 50; and 55oC, with a variation of the drying air flow rate of 1.3; 1.6; 1.9; 2.2; and 2.4 m/s. The optimum temperature and drying air flow rate are 50oC and 1.9 m/s since the highest flavonoid content was obtained at those condition as much 0.78 ± 0.001 gram QE/100gram extract. Dried products which packaged in tea bags have a content of 23.60% carbohydrate, total fat 3.50%, protein 5.35%,antioxidant 154.25 ppm and calorific value of 1430 Kcal/100 grams. It can be concluded that Ficus carica L. drying process using a tray dryer can be used to produce herbal leaf tea which is high in antioxidants and flavonoid content.
Laju Korosi Logam Baja Karbon Rendah di Larutan Garam pada Berbagai Konsentrasi Inhibitor Korosi dari Ekstrak Daun Pepaya: Low Carbon Steel Metal Corrosion Rate in Salt Solution at Various Concentrations of Corrosion Inhibitor from Papaya Leaf Extract Ninik Lintang Edi Wahyuni; Rony Pasonang Sihombing; Nurcahyo; Agustinus Ngatin; Yunus Tonapa Sarungu; Alfiana Adhitasari; Bambang Soeswanto; Emma Hermawati Muhari; retno indarti
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 2 (2023): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i2.16344

Abstract

Papaya leaf extract could be used as an organic corrosion inhibitor. Corrosion inhibitors were used as a method to reduce corrosion rate. The most corrosive environment was the marine environment. The purpose of this study was to determine the best concentration of papaya (Carica papaya) leaf extract inhibitor which could reduce the corrosion rate of low carbon steel in a 3.56% NaCl solution environment. The maceration process was carried out for 24 hours with 70% ethanol solvent with a solute:solvent ratio of 1:8 (w/v) at room temperature. Inhibitor extracts were analyzed qualitatively with the phytochemical method. The addition of FeCl3 was carried out on the inhibitor extract from papaya leaves. The color change occurred from blackish brown to greenish black which indicated the presence of tannin compounds in the papaya leaf extract. Corrosion testing was carried out with hot stream temperature setting at 45⁰C to 55⁰C and concentrations of inhibitor extracts at 300, 600, and 900 ppm. The test was conducted for 36 hours with a span of metal mass every 6 hours. Corrosion rate calculation is done by weight loss method. The results showed that papaya leaf extract inhibitors positive contained corrosion inhibitor and could reduce the corrosion rate in 3.56% NaCl solution. The corrosion rate without inhibitor is 1.023 mmpy. Corrosion rates with inhibitor concentrations of 300, 600, and 900 ppm were 0.755, 0.585, and 0.438 mmpy, respectively.
Co-Authors Bambang Soeswanto Emma Hermawati Emma Hermawati Muhari Ngatin, Agustinus Ninik Lintang Edi Wahyuni Nurcahyo Retno Indarti Sihombing, Rony Pasonang Yunus Tonapa Sarungu Yusmardhany Yusuf