𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Quantitative analysis by nuclear magnetic resonance with fourier transform II13C resonance

✍ Scribed by B. Thiault; M. Mersseman

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
497 KB
Volume
8
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Quantitative analyses have been carried out by ^13^C NMR spectroscopy using Fourier transformation. The Overhauser effect, due to the broad band decoupling of protons, has been suppressed using the two existing methods (gated decoupling and paramagnetic species), and results from each are compared. Both require a calibration curve, and the second method, when applied to aromatic substances, needs the ratio between the sample to be analysed and the paramagnetic species to be less than a certain value. Experiments have been made with pure products and blends of pure products containing both saturated and aromatic carbons. The precision of the results is given.

πŸ“œ SIMILAR VOLUMES

Quantitative analysis by nuclear magneti
Quantitative analysis by nuclear magnetic resonance with fourier transformation: Iβ€”Proton case
✍ B. Thiault; M. Mersseman πŸ“‚ Article πŸ“… 1975 πŸ› John Wiley and Sons 🌐 English βš– 364 KB

## Abstract For quantitative analysis by NMR spectroscopy with Fourier transform, the usual experimental conditions have to be partly modified. Careful regulation of the delays between the different phases of the process is particularly important. The filters of the spectrometer and the calculation

Quantitative analysis by nuclear magneti
Quantitative analysis by nuclear magnetic resonance using precision coaxial tubing
✍ Koichi Hatada; Yoshio Terawaki; Hiroshi Okuda πŸ“‚ Article πŸ“… 1977 πŸ› John Wiley and Sons 🌐 English βš– 388 KB

## Abstract Quantitative analysis by n.m.r. using precision coaxial tubing is described. A solution of the intensity standard is placed in the central capillary and the sample of interest in the surrounding annulus. By this method the contamination of the sample by the standard compound can be avoi

Quantitative analysis of pyrrolizidine a
Quantitative analysis of pyrrolizidine alkaloid mixtures from Senecio vulgaris by carbon-13 nuclear magnetic resonance spectroscopy
✍ L. A. C. Pieters; A. J. Vlietinck πŸ“‚ Article πŸ“… 1987 πŸ› John Wiley and Sons 🌐 English βš– 294 KB πŸ‘ 1 views

A I3C NMR method has been developed for obtaining simultaneously structural and quantitative information on mixtures of pyrrolizidine alkaloids from Senecio vulgaris L. (Compositae). The samples contained seneciphylline, senecionine, retrorsine and the corresponding E geometrical isomers, spartioidi