Laboratory Benchtop NMR Systems
For the past 17 years we have been actively developing applications for permanent magnet systems shimmed to approximately 3 Hz at peak half height. In the past the focus was in on-line applications in refining and petrochemical and lab systems were not actively marketed. With the third generation of NMR instrument it is time for these robust, non-cryogen, permanent magnet systems to be applied in laboratory and general quality testing applications.
In our laboratory we have an application development advantage in that we have high field 300 MHz NMR systems that are active in commercial NMR analysis and in high field method development. We also have ESR, FTIR-ATR, GC, moisture measurements, and other instruments that we can bring to bear on applications. We can readily develop 60 MHz applications using the 300 MHz NMR data as the basis set to provide primary parameters for analysis or to answer questions about the spectral overlaps that inevitably occur in 60 MHz data sets where 1 ppm on the spectrum axis represents only 60 Hz rather than 300 Hz. When a high field NMR spectroscopist observes a data comparison of spectra obtained at 60 MHz to the same spectrum obtained at 300 MHz (a resolution that most are familiar with) the penny suddenly drops concerning the possibilities that exist for NMR analysis at this field and an appreciation for the work that was performed for the first 30 years of NMR technology on 40 and 60 MHz CW NMR’s. We have become accustomed to our big supercon magnets and have forgotten what can be accomplished at 60 MHz. In these days of powerful computers for multivariate analysis and the ability ot perform global spectral deconvolution (GSD) the ability to develop killer-apps for bench-top, at-line, or in-line applications of 1H/31P/19F/23Na/11B NMR for cryogen-free, 110V mains powered systems is here. The application of chemometrics and GSD at 60 MHz can allow the lower resolution issue of peak overlap to be overcome.
Comparing spectra obtained on our 300 MHz systems to the same samples on the 60 Mhz systems. Direct comparisons of the data make you realize that though the resolution isn’t anywhere near the same – the information is present in the 60 MHz spectrum. In the links below I have included a number of PDFs showing comparisons of complex essential oil spectra, fish oil and vegetable oils (looking at omega-3 fatty acid content), polyurethane adhesive polymers, shale oil, gasoline and a spectrum of Poloxamer which is a oxyethylene-oxypropylene copolymer utilized in the pharmaceutical industry that has an NMR based USP/NF method associated with it to determine the oxyethylene content.
Process NMR Associates is actively involved in development of NMR applications utilizing 60 MHz or 300 MHz NMR data. We can develop applications for you and also provide the robust, proven instrumentation that can make affordable, cryogen-free NMR analysis a common automated laboratory tool. Please contact us if you feel you have an application where NMR may provide an answer through direct measurement or chemometric calibration.