Adsorption of low molecular weight food relevant polyphenols on cross-linked agarose gel

Hydroxyalkyl Amination of Agarose Gels Improves Adsorption of Bisphenol A and Diclofenac from Water: Conceivable Prospects

“…The value of Q max is below the content of TRIS in the TRIS-ZetaCell 6B (92 µmol/mL), see Table 1, which indicates limited accessibility of TRIS-groups to the solute. The value of K L is within the range reported for the interaction of the 12% cross-linked agarose gel with several polyphenols in water [19],…”

“…The value of Qmax is below t content of TRIS in the TRIS-ZetaCell 6B (92 µmol/mL), see Table 1, which indicates limite accessibility of TRIS-groups to the solute. The value of KL is within the range reported f the interaction of the 12% cross-linked agarose gel with several polyphenols in water [19 where resveratrol showed the strongest interaction, K L = 7 × 10 −6 M, and gallic acid showe the weakest, KL = 1.2 × 10 −2 M. Expressed in mg/g dry polymer, and compared with other functional polysaccharid adsorbents, the maximal specific adsorption capacity of TRIS-ZetaCell CL6B is 62 mg/ e.g., it is lower than that of phosphonated levan (105 mg/g [20]) and higher than that chitosan (34 mg/g [21]).…”

“…umn with 50% aqueous ethanol and water: see the breakthrough curve from repeated bisphenol A application in Figure 6a. Lower chromatographic retention of polyphenols on Superose TM 12 cross-linked agarose gel column in the presence of higher concentration of ethanol in the mobile phase has been registered elsewhere [19], while the adsorbed amounts of polyphenols calculated from batch experiments accordingly decreased with increasing ethanol concentration. A similar filtration experiment has been completed with water spiked with diclofenac, and its chemical structure is shown in Figure 7.…”

pH-Dependent Dual-Mode Detection toward Uranium by a Zinc-Tetraphenylethylene Fluorescent Metal–Organic Framework

“…The emission intensity in the 10 ppm uranyl solution decreased to 41.90% compared to the original level of the single ECUT-180 suspension (Figure b). We also performed Langmuir fitting between the quenching ratio and uranyl concentration (Figure d), while the R 2 value (0.975) was smaller than that at pH 2, which indicates that the quenching effect was more inclined to the surface interaction between ECUT-180 and the uranyl ion . The linear fitting of the function between the uranyl concentration ( C ) and C /[( I 0 – I )/ I 0 )] resulted in a linear correlation with R 2 = 0.998, which also shows a high correlation coefficient for the quantitative determination of uranium concentration (Figure d).…”