Rapid quantitative ¹H-¹³C two-dimensional NMR with high precision.

ABSTRACT: Two dimensional (2D) ¹H-¹³C heteronuclear single-quantum correlation (HSQC) spectroscopy has recently been proposed for quantitative determination of typical linear low density polyethylene (LLDPE) with high accuracy. It requires highly precise measurement to achieve further reliable quantification. In this context, this paper aims at determining conditions that allow the achievement of high precision. On the basis of the optimized parameters, two time-saving strategies, nonuniform sampling (NUS) and band-selective HSQC are evaluated on model polyolefins in terms of repeatability. Precision better than 0.3% and 5% for ethylene content (E mol%) and 1-hexene content (H mol%) of the model poly(ethylene-co-1-hexene)s are obtained with 50% NUS or band-

SUBMITTER: Wu YS 

PROVIDER: S-EPMC8981411 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature