Ultrasound‐assisted extraction of corn carotenoids in ethanol

Abstract

The effect of ultrasonic-assisted extraction of carotenoids from corn with a 1:6 ratio of maize meal to ethanol (g g )1 ) was studied, and the extractive structure was analysed by FTIR. The results showed that at 12 min, the extraction concentration of carotenoids with ultrasound assistance was 3.6 times higher than that without ultrasound assistance. And the concentration of carotenoids obtained from using ultrasound assistance for 30 min was much higher than highest concentration of carotenoids obtained through magnetic stirring in 300 min. After studying multiple variables, the extraction concentration of carotenoids was higher using 700-900 W power, in 20 kHz frequency and at 38-40°C than that in other conditions. The activation energy of the extraction process was 44.61 KJ mol )1 . In addition, to achieve the best efficiency, the horn had to be placed deeper at the beginning of extraction and then raised at the 12 min point to 4.70 cm from the bottom of the beaker. By using FTIR analysis, we concluded that the structures of the corn carotenoids were not destroyed by ultrasound assistance.

Optimization of ultrasonic-assisted extraction of astaxanthin from green tiger (Penaeus semisulcatus) shrimp shell

“…The extraction efficiency of astaxanthin increased with increasing in ultrasonic amplitude up to 20%, but then decreased at further higher amplitudes. Similar trend has been reported in extractives from plants [32] , [33] . Ultrasound represent mechanical waves with a frequency > 20 kHz consisting of a series of compression and rarefaction cycles that can be propagated through solid, liquid or gaseous media resulting in the displacement and dislodgement of the molecules from their original positions.…”

Efficiency of ultrasound assisted extract of <em>Delonix regia</em> petals as natural antioxidant on the oxidative stability of sunflower oil

“…In other words, extending the extraction time from 50 min to 120 min enhanced the extraction of carotenoids by less than 6%, regardless of the extraction conditions used. This result is in agreement with that found by Ye et al, (2011).…”

HPTLC Phytochemical Screening and Hydrophilic Antioxidant Activities of &lt;i&gt;Apium graveolens&lt;/i&gt; L., &lt;i&gt;Cleome gynandra&lt;/i&gt; L., and &lt;i&gt;Hibiscus sabdariffa&lt;/i&gt; L. Used for Diabetes Management

“…Some of them in the plant extracts (Ag, Cg, and Hs) would explain the therapeutic properties Apium graveolens, Cleome gynandra, and Hibiscus sabdariffa. In light of recent scientific development, plants' medicinal properties have been investigated worldwide due to their potential pharmacological activities and economic viability [27].…”