AI Article Synopsis
- Subcritical water extraction (SWE) was optimized for extracting pectin from fresh sunflower heads, achieving a maximum yield of 6.57% under specific conditions of 8 bar pressure, 120 °C temperature, 20 min time, and a 7 mL/g liquid-solid ratio.
- The extracted pectin was characterized as low methoxyl with a degree of esterification analyzed through titrimetry and FTIR, showcasing a molecular weight of 11.50 kDa and a galacturonic acid content of 82%.
- Thermogravimetric and differential scanning calorimetry analyses indicated excellent thermal stability, confirming the effectiveness of SWE as an eco-friendly pectin extraction method.
Article Abstract
Subcritical water extraction (SWE) of pectin from fresh sunflower heads was optimized using the response surface methodology (RSM). The optimal conditions for the maximum yield of pectin (6.57 ± 0.6%) were found to be a pressure of 8 bar, temperature of 120 °C, time of 20 min, and liquid-solid ratio (LSR) of 7 mL/g. The degree of esterification (DE) of pectin was analyzed by titrimetry and Fourier transform infrared (FTIR) methods, which was low methoxyl pectin. The molecular weight ( ), galacturonic acid (GalA) content, and surface tension of pectin were 11.50 kDa, 82%, and 45.38 mN/m (1.5% w/v), respectively. Moreover, thermogravimetric (TG) and differential scanning calorimetry (DSC) analysis confirmed that pectin had excellent thermal stability. FTIR and H NMR spectra confirmed its structure. This study demonstrated that SWE could be used as a productive and environmentally friendly method for extracting pectin from fresh sunflower heads.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7330903 | PMC |
| http://dx.doi.org/10.1021/acsomega.0c00928 | DOI Listing |
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