2015
DOI: 10.1080/14786419.2015.1040992
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Thermal properties of tannin extracted from Anacardium occidentale L. using TGA and FT-IR spectroscopy

Abstract: The chemical nature of the polyphenols of cashew kernel testa has been determined. Testa contains tannins, which present large molecular complexity and has an ancient use as tanning agents. The use of tannins extracted from cashew testa, considered in many places as a waste, grants an extra value to the cashew. In this work we have analysed through high performance liquid chromatography, infrared spectroscopy (FT-IR) and thermo gravimetric analysis the average molecular weight, main functional groups and therm… Show more

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Cited by 33 publications
(12 citation statements)
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“…This confirms the presence of carbon hydrogen chains in the char structure. The peak at 1630 cm -1 is for aromatic structure, the peak at 1400 cm -1 is for C-N and C=N groups, the peak at 1160 cm -1 is for P-O, the peak at 1050 cm -1 is for P-O-C, the peak at 984cm -1 is for polyphosphate and/or pyrophosphate, the peak at 881 cm -1 is for alkene, the peak at 492cm -1 is for O-P-O group (Abdelkhalik et al 2020(Abdelkhalik et al , 2019Wahyono et al 2019;Makhlouf et al 2017a,b;Viswanath et al 2015;Chen and Wang, 2007).…”
Section: Ftir Analyses Of Char Residuementioning
confidence: 99%
“…This confirms the presence of carbon hydrogen chains in the char structure. The peak at 1630 cm -1 is for aromatic structure, the peak at 1400 cm -1 is for C-N and C=N groups, the peak at 1160 cm -1 is for P-O, the peak at 1050 cm -1 is for P-O-C, the peak at 984cm -1 is for polyphosphate and/or pyrophosphate, the peak at 881 cm -1 is for alkene, the peak at 492cm -1 is for O-P-O group (Abdelkhalik et al 2020(Abdelkhalik et al , 2019Wahyono et al 2019;Makhlouf et al 2017a,b;Viswanath et al 2015;Chen and Wang, 2007).…”
Section: Ftir Analyses Of Char Residuementioning
confidence: 99%
“…A comparative analysis of results was made using tannic acid. The bands characteristic of CvC, CZC and OH bonds were exhibited by FT-IR spectra [63]. Likewise, the average molecular weight, main functional groups and thermal properties of tannins isolated from A. occidentale were investigated using HPLC, FT-IR and thermogravimetric analysis.…”
Section: Phytochemical Composition Of Anacardium Plants: a Brief Omentioning
confidence: 99%
“…Likewise, the average molecular weight, main functional groups and thermal properties of tannins isolated from A. occidentale were investigated using HPLC, FT-IR and thermogravimetric analysis. Bands characteristic of C=C, C-C and OH bonds were identified through FT-IR spectra analysis [63]. Tannin content was also investigated in the testa obtained from high-yielding varieties of cashew and from samples of commercial cashew processors in India and compared with almond testa.…”
Section: Phytochemical Composition Of Anacardium Plants: a Brief Omentioning
confidence: 99%
“…When the cells were LPS-stimulated, the lowest doses of 0.5 μ g/mL and 5 μ g/mL cotreatment inhibited the decrease in cell viability mediated by LPS. It is known that phytochemical composition of the plant Anacardium occidentale presents phenolic compounds, such as quercetin, anthocyanins, and tannins [ 31 33 ]. These phytochemical compounds are related to several biological activities, including antioxidants, apoptotic, antiapoptotic, and anti-inflammatory activities [ 34 ].…”
Section: Discussionmentioning
confidence: 99%