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020 _aTHE0004019(Local)
039 9 _a201905151228
_bfauzi
_c201107131955
_dVLOAD
_c201103301004
_dida
_y201005241538
_zida
040 _aUMP
090 _aTP156.E8 K43 2009 rs Bc.
100 0 _aKhairul Anwar Mohamad Said
245 1 0 _aUltrasonic extraction of antioxidant compound in guava /
_cKhairul Anwar B. Mohamad Said
246 3 _aUltrasonic extraction of antioxidant compound in guava
_h[electronic resource]
260 _aKuantan, Pahang :
_bUMP,
_c2009
300 _avii, 59 p. :
_bill. (some col.) ;
_c30 cm. +
_e1 computer disc
502 _aProject paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2009
504 _aBibliography : p. 37-42
520 3 _aThe antioxidant such as ascorbic acid (AA) in guava juice has attracted a lot of interest from the public and herbal industries because of the antioxidant can inhibit the oxidation of body cells that can lead to health problem. The work done in this research investigates the most suitable operating parameter to extract the ascorbic acid from guava using ultrasonic extraction method. Different parameter volume of solvent which is ethanol at 30ml, 50ml, 200ml and 250ml. After determine the best solvent volume were investigated the experiments were conducted using different ultrasonic power at 150W, 200W, 250W and 300W after the determination of the best solvent volume. The sonication time was set at 20min, 30min, 50min and 60min. The extraction yields were analyzed using High Performance Liquid Chromatography system (HPLC). Result obtained revealed that 250 ml of ethanol, ultrasonic power of 300W and 20 minutes sonication time produce the highest yield of ascorbic acid. The extracted amount of ascorbic acid was 4.3150 mg/L. Therefore, these parameters can be concluded as the most optimum operating parameters in extracting ascorbic acid from guava using ultrasonic extraction method.
650 0 _aExtraction (Chemistry)
650 0 _aUltrasonics
650 0 _aAntioxidants
999 _aVIRTUA40
_c3772
_d3778
999 _aVTLSSORT0080*0200*0400*0900*1000*2450*2460*2600*3000*5020*5040*5200*6500*6501*6502*9992