WebTo quantify the concentration of compounds, calibration curves of standards (kaempferol, isorhamnetin, quercetin, rutin, caffeic acid, gallic acid) were constructed in the range 0–500 ppm. The limit of detection (LOD) and limit of quantification (LOQ) were 0.5 and 1 ppm, respectively, for kaempferol, caffeic, and gallic acid, 1 and 2 ppm ... WebOct 1, 2015 · The total phenolic content of the methanolic root extract, calculated from the calibration curve (R 2 = 0.998), was 45.17 ± 1.70 gallic acid equivalents/g, and the …
Simultaneous estimation of Gallic acid, Curcumin and …
WebApr 12, 2024 · The Fe 3+ reducing activity was determined from a gallic acid standard curve and computed as mg/g equivalent of the gallic acid (mg/g GAE) using the ... punicalagin B and ellagic acid in the ellagitannins fraction were identified and quantified from calibration curves established using a range of calibration standards prepared … WebApr 20, 2024 · The maximum absorption wavelength of gallic acid was determined to be 765 nm from these spectra and a calibration curve of gallic acid was prepared at 765 nm. The total phenolic content of endemic Asparagus lycicus plant was calculated by using gallic acid calibration curve (Spanos and Wrolstad 1990). just cuts burleigh heads
Materials Free Full-Text Silica and Silica–Titania Xerogels Doped ...
WebMolecules 2013, 18 6855 The percentage increase in absorbance of each solution was compared at the wavelengths of 691, 715, 760, and 800 nm. The statistical analysis indicated a significant increase in absorbance at 760 nm compared to data for 691 and 715 nm for all solutions (gallic acid, F60,3P < 0.001; tannic acid, F60,3P < 0.001; catechin, … WebPreparation of calibration curve 4 3.3. Analysis of total phenols 5 3.4. Removal of tannin from the tannin-containing extract 5 4. ... Determination of free gallic acid 7 5.3. Determination of gallic acid present in free and in gallotannin forms 7 5.4. Calibration curve 7 6. GALLOTANNIN DETERMINATION USING HPLC 8 6.1. Preparation of … WebSep 10, 2024 · TPC in samples was estimated by gallic acid calibration curve, and results were expressed as mg of gallic acid equivalent (GAE)/100 g dry mass of plant material (Kamtekar et al., 2014). Total Flavonoid Content Assay. TFC of each extract was determined by using aluminum chloride colorimetric assay (Kamtekar et al., 2014). just cut ez light norway spruce