Solid-State 13C NMR Analysis of Herbal Supplements

Solid-state 13C NMR is an excellent way to investigate what chemical functionality is present in herbal supplements. The large resonances at 60-105 ppm are due to cellulose/polysaccharides and some sugars. The peaks in the 0-60 ppm region are aliphatic carbons…

Process NMR Associates to Present at 3 Meetings

I will be presenting a poster and two invited talks at three meetings this Summer and Fall. The first meeting is Petrophase XI 2010 (11th International Conference on Petroleum Phase Behaviour and Fouling) in Jersey City, NJ, June 13-17 -…

NMR Post-Processing Freeware

It was announced this week that the ACD NMR Processor Academic Edition is freely available for non-commercial use and can be downloaded from the ACD Website. Other Windows based NMR processing software packages are available and here is a listing…

Digital Spectrometers Will Change the Marketplace for NMR Technology

Digital Spectrometers based on field programmable gate arrays will soon change the face of NMR spectroscopy as a routine use analytical instrument. Stan Sykora in his excellent blog (http://www.ebyte.it/stan/blog07.html#07jun14) describes how the transition of NMR spectrometers to digital electronics has…

Reaction Monitoring by Process NMR

Presented here are several simple reactions monitored by 60 MHz process NMR performed in a 5 mm NMR tube. Reaction #1: Acetic Anhydride in Water - Reacts to form Acetic Acid NMR Monitored Reaction Profile Reaction #2: Acetic Anhydride +…

Examples of 60 MHz Process NMR Spectral Resolution

These are non-spinning spectra obtained on a Qualion process NMR spectrometer operating at 58 MHz. The spec on water at this shim level is 1.5/5/20 Hz at 50%/10%/0.5% peak height. The first spectrum is of 91% isopropyl alcohol in water…