Two-dimensional qNMR of anthraquinones in Frangula alnus (Rhamnus frangula) using surrogate standards and delay time adaption.
Sign Up to like & getrecommendations! Published in 2019 at "Analytica chimica acta"
DOI: 10.1016/j.aca.2019.06.046
Abstract: In the absence of adequate reference material, a problem often encountered in natural product chemistry, we investigated the use of surrogate standards in two-dimensional qNMR for the quantification of anthraquinones in the bark of alder… read more here.
Keywords: frangula alnus; qnmr anthraquinones; surrogate standards; anthraquinones frangula ... See more keywords
Determination of Total Sennosides and Sennosides A, B, and A1 in Senna Leaflets, Pods, and Tablets by Two-Dimensional qNMR
Sign Up to like & getrecommendations! Published in 2022 at "Molecules"
DOI: 10.3390/molecules27217349
Abstract: In the present work, a two-dimensional qNMR method for the determination of sennosides was established. Using band-selective HSQC and the cross correlations of the characteristic 10–10’ bonds, we quantified the total amount of the value-determining… read more here.
Keywords: two dimensional; total sennosides; dimensional qnmr; sennosides sennosides ... See more keywords