Uji dan identifikasi aktivitas antioksidan isolat BAL CIN-2 hasil isolasi cincalok
Wijanarka Wijanarka, Fakultas Sains dan Matematika, Universitas Diponegoro Semarang
Endang Kusdiyantini, Fakultas Sains dan Matematika, Universitas Diponegoro Semarang
Abstract
Test and identification of antioxidant activity of isolates LAB CIN-2 isolated from cincalok
This study aimed to test the antioxidants produced by LAB CIN-2 isolates using α,α-diphenyl-β-picrylhydrazyl (DPPH) and phosphomolybdenum methods, to identify antioxidant compounds produced by LAB CIN-2 isolates using the Thin Layer Chromatography (TLC) and UV-Vis spectrophotometer, as well as to analyse the antioxidant functional groups of LAB CIN-2 isolate using the Fourier Transform Infrared Spectroscopy (FTIR) method. The culture was grown on MRSA media and then the growth was observed on MRSB media for 72 hours, then analyzed using the specified method. TLC test results showed that LAB isolate CIN-2 produced four spots with an Rf value of 0.98; 0.91; 0.73; and 0.6. The DPPH test showed that the antioxidant properties of the supernatant isolates of LAB CIN-2 were very weak. The phosphomolybdenum method showed that the antioxidant content of the supernatant of LAB CIN-2 isolate was 1.906 mgAAE/ml. Analysis using a UV-Vis spectrophotometer produces 4 absorption waves with a maximum absorbance 3,943 at a wavelength of 290 nm. The test is suspected that the compounds contained in it are flavonoid compounds of the flavanone or dihydroflavonol group. Analysis using FTIR showed that antioxidant from supernatant of LAB isolate CIN-2 was suspected to contain flavonoid compounds with aromatic O-H and C=C functional groups. It can be concluded that supernatant from LAB CIN-2 isolates contains weak antioxidants in the form of compounds from the flavonoids group.
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DOI: https://doi.org/10.21831/jps.v1i1.44187
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