Enhancement of chiral drugs separation by a novel adjustable gravity mediated capillary electrophoresis combined with sulfonic propyl ether β-CD polymer

Flotation recovery of barite from high-density waste drilling fluid using β-cyclodextrin as a novel depressant and its mechanism

“…To understand the adsorption mechanism of β-CD on barite and low-density solid phase, FTIR was used to investigate the preadsorption of β-CD on minerals, and the results are presented in Fig 9(a) . In the FTIR of β-CD, the peak at 2925 cm -1 corresponds to the stretching vibration of C-H bond, while the peaks at 1646 cm -1 and 1295 cm -1 are attributed to the bending vibration of -OH on the glucopyranose ring in the β-CD molecule, the characteristic peaks at 1157 cm -1 , 1120 cm -1 , and 1027 cm -1 indicate the C-O-C and C-O stretching vibrations, while the peak at 576 cm -1 represents the molecular backbone vibration of β-CD [ 52 – 55 ]. The FTIR of SDS is depicted in Fig 9(b) , the peaks at 3447 cm -1 and 3134 cm -1 are the asymmetric and symmetric telescopic vibrational absorption peaks of C-H in the alkyl chain, respectively, the bending vibrational peak of C-H at 1445 cm -1 and the peak at 1102 cm -1 is the asymmetric telescopic vibrational peak of C-O-S [ 56 , 57 ].…”

Capillary Electrophoresis: A Three-Year Literature Review

“…The polymer backbone may also influence the environment of the CD cavity and thus positively affect enantioselectivities in CE buffers. Nan et al used a mild polycondensation approach to synthesize a water-soluble sulfonic propyl ether β-CD polymer . The sulfonic substitution degree of each β-CD in the polymer was statistically homogenized, resulting in high uniformity of electrophoretic abilities and a strong enantioselectivity toward 12 chiral drugs.…”