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Daniel Tarigan
Jurusan Kimia FMIPA UNMUL
Chemistry

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SINTESIS ASKORBIL LAURAT DARI METIL LAURAT DAN ASAM ASKORBAT MELALUI REAKSI TRANSESTERIFIKASI DENGAN KATALIS LIPASE SERTA UJI AKTIVITAS ANTIOKSIDAN Dyah Adyana; Daniel Tarigan; Chairul Saleh
JURNAL KIMIA MULAWARMAN Vol 14 No 2 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Antioxidant are defined as compound that is capable of delay, postpone or prevent oxidation reaction, such as on foods and drugs. Antioxidant can be found in nature but the used is relatively limited because hydrophilic. This research aims to modified natural antioxidant so as be used in lipophilic media. Methyl laurate is one of a fatty acid ester potentialy can be used in industry. Modified were made by synthesize of methyl laurate and ascorbic acid through transesterification with catalyst is lipase from sesame seeds (Sesamun indicum L.) in a organic solvent such as acetone. Transesterification process does on reacton time at 36 hours at temperature (40-50) ºC and pH is 7 so has yield produced is 53,89 %. The result is ascorbyl laurate identified of the functional groups using by FT-IR spectrophotometer. Based on the result identification of the functional groups by FT-IR spectrophotometer, then do the analysis of antioxidant activity with a Radical Reduction Method DPPH (2,2-diphenyl-1-picrylhidrazyl). Antioxidant activity value IC50 is 40,57 ppm. This result indicated the potential of ascorbyl laurate as antioxidant.
SINTESIS SURFAKTAN TURUNAN AMIDA YANG DIPEROLEH DARI REKASI METIL RISINOLEAT DAN ETILENDIAMINA Daniel Tarigan; Magdaleni Rahayu Agustina; Soerja Kosenarpadi
JURNAL KIMIA MULAWARMAN Vol 15 No 2 (2018)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v15i2.609

Abstract

Interesterification of castor oil with methanol using base catalyst gave mixture of fatty acid methyl esther (FAME) castor oil. Methyl risinoleate as major composition of methyl esther castor oil was subjected to column chromatography using petroleum ether:diethyl ether (19:1, v/v) as eluent, to give yield 73%. Amidation of methyl risinoleate with ethylendiamine under refluks condition using benzene as solvent for ± 12 hours and catalyst NaOCH3, gave 1,3–Dirisinoleil-Etilendiamida compound and 59% yield. The reactioned product 1,3–Dirisinoleil-Etilendiamida has been confirmed its structure using FT-IR spectroscopy, and Hidrofile Lipofile Balance (HLB) value was determined by titration method 12,56
Co-Authors Chairul Saleh Dyah Adyana Magdaleni Agustina Rahayu Soerja Kosenarpadi