Influence of ethanol, water, and their mixtures as co-solvents of the supercritical carbon dioxide in the extraction of phenolics from purple corn cob ( Zea mays L.)

Monroy, Yaneth M.; Rodrigues, Rodney Alexandre Ferreira; Sartoratto, Adilson; Cabral, Fernando A.

doi:10.1016/j.supflu.2016.07.019

Cited by 56 publications

(22 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was observed that the solid:liquid ratio and extraction time affected the yield of phenolics, which significantly increased when higher values of these variables are used for extraction. Our findings are consistent with those previously reported by Monroy et al [ 11 ], who reported an increased extraction of phenolic compounds when the solid:liquid ratio (crushed purple corn cob + co-solvent ethanol:water) was increased. In addition, due to the polarity of the phenolics, a greater recovery is expected with the addition of polar solvents [ 15 ].…”

Section: Resultssupporting

confidence: 93%

“…The extraction of phenolic compounds from different parts of maize has been carried out using organic solvents (different to ethanol) and chemical solutions [ 10 ], which could considerably increase the pollution in the environment and limit their use in food applications. In this sense, it has recently been reported that the use of GRAS (generally recognized as safe) solvents, including water, ethanol, and their mixtures, offer great opportunities for obtaining high-quality and high-phenolic content extracts from different plant materials, including the byproducts derived from maize [ 11 , 12 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

UPLC-ESI-QTOF-MS2-Based Identification and Antioxidant Activity Assessment of Phenolic Compounds from Red Corn Cob (Zea mays L.)

et al. 2018

View full text Add to dashboard Cite

In this study, the extraction of phenolic antioxidants from red corn cob was carried out using ultrasound-assisted extraction (UAE). The solid:liquid ratio and extraction time were evaluated when obtaining these bioactive compounds. The total phenolic contents were evaluated using the Folin Ciocalteu method, while the antioxidant activity was measured by ABTS•+ and DPPH• assays. The amount of phenolic compounds ranged from 215.17 ± 33.49 to 527.33 ± 103.79 GAE mg/100 g and, overall, high solid:liquid ratios and time periods release more phenolic compounds. Moreover, the red corn cob extracts showed higher radical scavenging capacity according to the results obtained using the ABTS•+ technique compared to the DPPH• test. The coupling of liquid chromatography and mass spectrometry assay allowed the determination of 11 phenolic compounds, including phenolic acids and flavonoids. Thus, our results demonstrated for the first time the potential of red corn cob as a source of bioactive compounds, which might be included in food and pharmacological preparations.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

UPLC-ESI-QTOF-MS2-Based Identification and Antioxidant Activity Assessment of Phenolic Compounds from Red Corn Cob (Zea mays L.)

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Anthocyanins content in grain of pigmented corn have been quantified at concentrations ranging from 0.3 to 8.8 mg/g (Somavat et al., )(Ryu, Werth, Nelson, Scheerens, & Pratt, )(Li, Somavat, Singh, Chatham, & Gonzalez de Mejia, )(Lopez‐Martinez et al., ) (Gálvez Ranilla et al., ) and total anthocyanins content in corn cob has been reported to vary from 2.02 to 14.7 mg/g, depending on corn race and extraction method applied (Kapcum, Uriyapongson, Alli, & Phimphilai, )(Monroy, Rodrigues, Sartoratto, & Cabral, )(Muangrat, Pongsirikul, & Blanco, ). However, only few studies on anthocyanins content in corn husk have been found.…”

Section: Introductionmentioning

confidence: 99%

Extraction and Identification of Anthocyanins in Corn Cob and Corn Husk from Cacahuacintle Maize

Fernández-Aulis

Hérnández-Vázquez

Aguilar-Osorio

et al. 2019

Journal of Food Science

View full text Add to dashboard Cite

Pigmented maize has been extensively studied due to its high anthocyanin content. This study has been focused mainly on kernel, although the whole plant of purple corn is a potential source of anthocyanins. First, general parameters of extraction (solvent system, solvent-to-solid ratio, number of extractions, and acid type) were established depending on the total anthocyanins content. Then, three extraction methods to access anthocyanins were compared: maceration extraction (ME), ultrasound-assisted extraction (UAE), and microwave-assisted extraction (MAE). Since the residual material still possessed an intense color, a further treatment was performed by application of enzymatic-assisted extraction (EAE). Three enzymatic cocktails (Xylanases, Celluclast, and Depol), pH, and temperature were evaluated to establish optimal reaction conditions. Subsequent analysis and identification of the anthocyanins obtained by four different extraction techniques were performed using HPLC and HPLC-mass spectrometry, respectively. The most efficient method was UAE using 20 min of ultrasound (100 W) preceded by sample treatment in the following conditions: ethanol/water/lactic acid mixture (80:19:1), two extractions, 1:10 solvent-to-solid ratio. As a result, anthocyanins from corn cob and corn husk were extracted at concentrations of 24.32 and 25.80 mg/gDW, respectively. No difference in the anthocyanins profile for samples extracted by three different methods was observed. However, an enhanced presence of cyanidin-3-(6''malonyl)glucoside was detected in the sample corresponding to the EAE method. Therefore, the Cahuacintle corn husk can be considered as a competitive source of anthocyanins with the available commercial sources.

show abstract

“…As far as the phenolic compounds are concerned, a number of different extraction techniques has been introduced, with the most frequent being with the use of water and organic solvents (e.g., ethanol, methanol) [ 6 , 7 ]. Ethanol, water and supercritical carbon dioxide are all classified as generally recognized as safe solvents (GRAS) [ 8 ]. The choice of an extraction solvent is dependent on the properties of the extracted compounds.…”

Section: Introductionmentioning

confidence: 99%

The Application of Supercritical Fluid Extraction in Phenolic Compounds Isolation from Natural Plant Materials

2018

View full text Add to dashboard Cite

The separation of phenolic compounds by supercritical fluid extraction has been widely studied throughout the last two decades. This is evidenced by a number of publications and articles. Supercritical fluid extraction (SFE) has become thus the effective method of separating the mentioned group of compounds. On the other hand, SFE is a beneficial approach in plant waste materials utilization and reduction of environmental burdens caused by the wastes. The aim of the study is to gather and systematize available information on the phenolic compounds separation that have been reported so far as well as to evaluate whether there is one optimal supercritical fluid extraction method for the phenolic compounds.

show abstract

Influence of ethanol, water, and their mixtures as co-solvents of the supercritical carbon dioxide in the extraction of phenolics from purple corn cob ( Zea mays L.)

Cited by 56 publications

References 58 publications

UPLC-ESI-QTOF-MS2-Based Identification and Antioxidant Activity Assessment of Phenolic Compounds from Red Corn Cob (Zea mays L.)

UPLC-ESI-QTOF-MS2-Based Identification and Antioxidant Activity Assessment of Phenolic Compounds from Red Corn Cob (Zea mays L.)

Extraction and Identification of Anthocyanins in Corn Cob and Corn Husk from Cacahuacintle Maize

The Application of Supercritical Fluid Extraction in Phenolic Compounds Isolation from Natural Plant Materials

Contact Info

Product

Resources

About