| dc.description.abstract | Psidium guajava (type Ruby Red) was used in this study to extract antioxidants with the
goal of providing the cosmetic industry. In the tropics, especially Vietnam, guava is a widely
grown crop. Guava extract is predicted to offer an effective, affordable source of antioxidants
for use in skin care products due to its low cost and claims that it contains high quantities of
ascorbic acid (vitamin C) and antioxidant components. Ascorbic acid (vitamin C) and
phytochemical compounds (including flavonoids and polyphenols) were extracted using
Soxhlet extraction and ultrasound-assisted extraction with extraction durations of 15, 30, and
60 minutes at 45 degrees Celsius. The findings demonstrated that the use of ultrasound-assisted
extraction for a brief period of time (15 minutes) did not produce the quite low results in any
of the three assays for total phenolic content, total flavonoid content, and DPPH radical
scavenging. Three different extraction times (15, 30, and 60 min) were tested utilizing
ultrasound-assisted extraction on the three samples, and the findings tended to get better the
longer the extraction time was. In both the DPPH radical scavenging assay (IC50 was 79.64
µg/mL) and the total phenolic content assay (180.05 ± 1.55 mg GAE/g extracts), Soxhlet
extraction produced the best results. Additionally, the ultrasound-assisted extraction in 60
minutes produced the greatest results in the total flavonoid content testing, with 11.19 ± 0.24
mg QE/g extracts. While the Soxhlet extraction method requires more time and solvent than
the other approach, the outcomes are only marginally better. In the total of three assays, the
difference in results between ultrasound-assisted extraction in 30 and 60 minutes was not
significant. Therefore, it is thought that ultrasound-assisted extraction in 30 and 60 minutes are
the two most practical techniques | en_US |
