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All Journal Jurnal Ilmu Dasar Jurnal Matematika & Sains PROSIDING SEMINAR KIMIA Pendas : Jurnah Ilmiah Pendidikan Dasar ALKIMIA : Jurnal Ilmu Kimia dan Terapan Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Indonesian Journal of Chemical Science and Technology Educenter: Jurnal Ilmiah Pendidikan EDUCENTER JURNAL PENDIDIKAN
Marham Sitorus
Program S3 Ilmu Kimia PPs UNAND Kampus Limau Manis Padang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Materials Science & Nanotechnology Mathematics Social Sciences Other

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FTIR Spectra Analysis to Confirm the Epoxidation Reaction of Castor Oil Trilita Putri Halasson Sihite; Marham Sitorus
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 9 No. 2 (2026): JULY 2026
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v9i2.69574

Abstract

Study This aim For confirm success reaction epoxidation oil distance (Ricinus communis Linn ) through analysis Epoxidation FTIR spectroscopy done use sour synthesized performance​ in a way in situ from formic acid with hydrogen peroxide . Reaction done using catalyst sour sulfate at a temperature of 70 o C and a time of 90 minutes . The reaction epoxidation is transformation group alkenes become epoxide or oxirane that is something ether cyclical member three . FTIR analysis can used For identify change group function main reactants and products .. From the results FTIR analysis then alkene (C = C) absorption at 1655 cm -1 is qualitatively transformed into castor oil epoxy with the appearance of C - O - C (epoxy ether) absorption at 1015 cm -1 for stretching and 858 cm -1 for bending . The decrease intensity absorption C=C alkene in epoxy oil caster based on FTIR spectra no seen in a way significant , because FTIR does not accurate used For analysis quantitative Because No common determine concentration compounds analyzed .​
ISOLASI DAN ESTERIFIKASI ASAM SINAMAT TOTAL GETAH KEMENYAN (STYRAX PARALLEONCOMUD PERK) DENGAN METIL SALISILAT MINYAK GANDAPURA Yeni Simbolon; Marham Sitorus
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 Nomor 02, Juni 2026 Public
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.44926

Abstract

A study was conducted with the aim of isolating cinnamyl cinnamate from styrax resin (Styrax paralleoneurum Perk) and reacting it with methyl salicylate from gandapura oil through hydrolysis and esterification. Characterization was performed using FT-IR and GC-MS. The FT-IR results indicated the success of the hydrolysis process, marked by the appearance of an O-H group at 3339.0 cm⁻¹. During the esterification stage, a shift in the carbonyl peak to 1671.0 cm⁻¹ and the appearance of aliphatic C-H absorption peaks at 2939.2 cm⁻¹ and 2850.7 cm⁻¹ originating from gandapura oil occurred, indicating that the reaction had taken place. However, GC-MS analysis showed that the target compound, cinnamyl salicylate methyl ester, had not yet fully formed, with the remaining reactants dominated by methyl salicylate and cinnamic acid. It was concluded that a reaction had occurred at m/z 131 but that it was an equilibrium reaction that had not yet reached total conversion to the target product.
Co-Authors Afrilita Harahap Ahmad Nasir Pulungan Djaswir Darwin Djaswir Darwis Eddiyanto Ester Hartina Ria Sinaga Grace Octavia Hutasoit Hazli Nurdin Hazli Nurdin Ida Duma Riris Junaldo Andreas Pardede Manihar Situmorang Marta Adeliana Sijabat Neva Asih Sary Silalahi Rabiah Afifah Daulay Ramlan Silaban Samosir, Rafidah Almira Sanusi Ibrahim Sihombing, Indah Sari Timotius Agung Soripada Trilita Putri Halasson Sihite Yeni Simbolon