Identifikasi Gugus Fungsi Minyak Buah Nipa (Nypa fructicans) Kaliwanggu Teluk Kendari Sulawesi Tenggara

Abstract

Nipa is one of the vegetation mangroves in Southeast Sulawesi The interpretation of FTIR spectrum was obtain vibrations of methylene (CH2) which overlap with vibration of the cis-alkene bond (cis-HC = CH), stretching vibration of ester group (C-O), bending vibrations of C-H, stretching vibration of ester group (C = O), and hydroxyl group (OH). Keywords: Nipa, oil, extraction, trans-esterification, FTIR ABSTRAKNipa adalah salah satu vegetasi magrove di Sulawesi Tenggara yang pemanfaatannya oleh masyarakat belum optimal karena kurangnya informasi mengenai hal tersebut. Untuk memberikan informasi komponen minyak dilakukan penelitian dengan judul "Identifikasi Gugus Fungsi Minyak Buah Nipa (Nypa fructicans) Kaliwanggu Teluk Kendari Sulawesi Tenggara". Penelitian dilakukan menggunakan ekstraksi dan reaksi trans-esterifikasi serta pengukuran FTIR. Minyak yang diekstraksi memiliki karakteristik berbau harum dan tidak berwarna (bening) serta mudah menguap (volatil). Kadar minyak diperoleh berturut-turut sebesar 13,72%, 10,57%, 7,73%, dan 3,62% untuk minyak dari bagian sabut, daging buah, tongkol buah, dan kulit ari daging buah nipa. Hasil interpretasi spektrum FTIR diperoleh gugus fungsi yaitu gugus vibrasi gugus methylene (CH2) yang overlap dengan vibrasi ikatan dari cis-alkena (cis-HC=CH), vibrasi ulur gugus (C-O) pada ester, vibrasi tekuk gugus C-H, vibrasi ulur gugus (C=O) dari ester, dan gugus hidroksil (OH).

Fatty Acid Evaluation of Seeds and Nuts by Spectroscopy and Chromatography

“…Overlapping of peaks has been reported earlier. The vibration of the methylene group (CH 2 ) overlaps with cis-alkene (cis-HC=CH), the stretching vibration ester (C-O), the bending vibration C-H, the stretching vibration ester (C=O), and hydroxyl group (OH) [24].…”

“…Both can identify the vibrational frequency of molecule bonds at the same wavenumber, but the intensity is relatively different [21]. The application of vibration spectrophotometers in fatty acids has been carried out on vegetable oils [22][23][24][25][26].…”

Isolation and Antioxidant and Antibacterial Activity of Flavonoid from <i>Ficus variegate</i> Blume

“…1 and 2 and tabulated in Table 1. The data of FTIR spectra of isolate are shown functional group of aromatic (717.52 cm -1 ), C-benzene (786.96 and 833.25 cm -1 ), C-O ether (1180.44 and 1242.16 cm -1 ), CH 3 (1458.18 cm -1 ), C=O ketones (1743.65 cm -1 ), C-H aliphatic (2839.22 and 2924.09 cm -1 ), and OH (3487.30 cm -1 ) [9]. FTIR spectra analysis results show that the isolate obtained is a class of flavonoid compounds, because of functional group of C=O ketones, C-O ether, and C-alcohol.…”