Nuclear magnetic resonance spectroscopy qualitative applications

Since conclusions reached in forensic laboratories are used in the criminal justice system, they must leave no room for doubt. Thus, analytical methods must meet strict criteria. They must be extremely selective, reproducible, sufficiently sensitive, and suitable for qualitative and quantitative analysis. It is also highly desirable for the method to call for the minimum number of pretreatment steps and to be applicable to compound mixtures without preliminary separation of their components. Nuclear magnetic resonance (NMR) spectroscopy meets these criteria. It is well... 

In industry, most lipid analysts are familiar with wide-line nuclear magnetic resonance (NMR). In Chapter 4 Diehl describes the application of Fourier transform NMR spectroscopy and illustrates that the technique can be used in lipid chemistry both qualitatively and quantitatively. By means of... 

Recent developments on acidity characterization of solid acid catalysts, specifically those invoking P solid-state nuclear magnetic resonance (SSNMR) spectroscopy using phosphorus-containing molecules as probes, have been summarized. In particular, various P SSNMR approaches using trimethylphosphine, diphosphines, and trialkylphosphine oxides (R3PO) will be Introduced, and their practical applications for the characterization of important qualitative and quantitative features, namely, type, distribution, accessibility (location/proximity), concentration (amount), and strength of acid sites in various solid acids, will be illustrated. 

Fundamental quantities, such as wavelengths and transition probabilities, determined using spectroscopy, for atoms and molecules are of direct importance in several disciplines such as astro-physics, plasma and laser physics. Here, as in many fields of applied spectroscopy, the spectroscopic information can be used in various kinds of analysis. For instance, optical atomic absorption or emission spectroscopy is used for both qualitative and quantitative chemical analysis. Other types of spectroscopy, e.g. electron spectroscopy methods or nuclear magnetic resonance, also provide information on the chemical environment in which a studied atom is situated. Tunable lasers have had a major impact on both fundamental and applied spectroscopy. New fields of applied laser spectroscopy include remote sensing of the environment, medical applications, combustion diagnostics, laser-induced chemistry and isotope separation. 

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