Sentence examples for ppm compound from inspiring English sources

In the experimental 1H-NMR spectra, aromatic and double bonded protons appear in the range 7.74 6.83 ppm (compound 3a) and 7.75 6.83 ppm (compound 3b).

The parameters adopted for analysis were: peaks with height ≥ 2000 counts; extraction restricted retention time 1.0-25.0 min, charge state considered was 1; peak spacing tolerance of 0.0025 m/z, plus 7.0 ppm; compound relative height ≥ 2.5%, and absolute height ≥ 1500 counts; for elements of C, H, O, N from 3 60, 0 120, 0 30, 0 30 respectively for generating formulae.

For each of these compounds, we confirmed that the sugar moiety was a glucose unit, as revealed by the relationships among the coupled protons in the 1H-2D COspectratrandnd by the chemical shifts of the corresponding signals of six carbon atoms-for example, at 104.2 (C-1´´), 75.2 (C-2´´), 77.7 (C-3´´), 70.6 (C-4´´), 75.0 (C-5´´), and 64.0 (C-6´´) ppm for compound 1 - in 13C NMR spectra.

I'm using 85% phosphoric acid as the ppm reference compound for P-31 NMR.

The most interesting conclusion from comparing the 1H-NMR spectra of these derivatives with compounds 5a e is the absence of the signal at δ 14.36 13.98 ppm in compounds 6a d.

We discard 53 compounds that contain deuterium, and 43 compounds that have parent mass accuracy worse than 10 ppm and five compounds with ion mass above 1000 Da.

Additionally, several hundreds ppm of these compounds and ppb order of minor compounds were detected in the distilled K. marxianus fermented whey spirits (Dragone et al. 2009).

δ in ppm, J in Hz Compound 1 and Compound 2 Measured in CDCl3, Chemical shifts referenced to residual CDCl3 (7.256 ppm).

For the determination of phenol in the range of ppm, 2,6-dichlorophenol compounds give absorption at a wavelength of 595 to 630 nm.

Low temperature gas sensors for monitoring low ppm volatile organic compounds (VOCs) in indoor climate have critical advantages in designing portable sensing devices.

In spectrum of 9 there is not observed carbon atom signal of CH2 group at 61.5 ppm characteristic for compounds 5 while there are signals of CH2 group at 41.2 ppm and signal of CH3 group at 22.3 ppm.