Luminescence techniques

A review pubHshed ia 1984 (79) discusses some of the methods employed for the determination of phenytoia ia biological fluids, including thermal methods, spectrophotometry, luminescence techniques, polarography, immunoassay, and chromatographic methods. More recent and sophisticated approaches iaclude positive and negative ion mass spectrometry (80), combiaed gas chromatography—mass spectrometry (81), and ftir immunoassay (82). 

DETECTION OF CHROMATE DEFECTS IN Cr(III) CONTAINING DIPHOSPHATES BY LUMINESCENCE TECHNIQUE... 

L. Zlatkevich, ed. Luminescence Techniques in Solid-State Polymer Research. Marcel Dekker, New Y)rk, 1989. Practical emphasis on polymers in the solid state rather than in solution. 

Electrochemical techniques have been developed into very powerful tools for research and technology. However, decades ago, researchers started to understand that even more insight could be obtained if electrochemical techniques were combined with additional spectroscopic tools. Among these it is sufficient to mention infrared spectroscopy, Raman spectroscopy, luminescence techniques, electroreflection or ellipsometry. 

Frequently, electrochemical information can be interpreted better in the presence of additional nonelectrochemical information. Typically, however, there is one significant restriction electrochemical and spectroscopic techniques often do not detect exactly the same mechanisms. With spectroscopic measurements (e.g., infrared spectroscopy), products that are formed by electrochemical processes may be detected. In other cases (luminescence techniques) mechanisms may be found by which charge carriers are trapped and recombine. Other techniques (electroreflection studies) allow the nature of electronic transitions to be determined and provide information on the presence or absence of an electric field in the surface of an electrode. With no traditional technique, however, is it... 

Recent Uses of Solid-Surface Luminescence Analysis in Environmental Analysis. Vo-Dinh and coworkers have shown very effectively how solid-surface luminescence techniques can be used for environmentally important samples (17-22). RTF has been used for the screening of ambient air particulate samples (17,18). In addition, RTF has been employed in conjunction with a ranking index to characterize polynuclear aromatic pollutants in environmental samples (19). A unique application of RTF reported recently is a personal dosimeter badge based on molecular diffusion and direct detection by RTF of polynuclear aromatic pollutants (20). The dosimeter is a pen-size device that does not require sample extraction prior to analysis. 

Luminescence yields data that often cannot be provided by any other methodology. This book is a compilation of a wide variety of original research contributions. Substantial information is given on the use of luminescence techniques to understand specific cell responses and the chemical mechanisms of cell action. An examination of natural environments is presented in the form of specific studies that characterize materials in both solid and liquid form and give information on the respective reactions of these materials in soil and water systems. Advanced research on standardization and standards developed for luminescence studies, as well as both active and passive use of luminescence, is included. 

Luminescence science has developed into a powerful tool for studying nature in macro- and microenvironments. At present, there are many scientiflc advances being reported that incorporate fluorescence technology into the research regimen. I expect this trend to continue as the scientiflc community becomes more cognizant of the knowledge to be gained by use of luminescence techniques. 

Brinkman, U. A. Th., de Jong, G. J., and Gooijer, C., Use of luminescence techniques for sensitive and selective determinations in HPLC (high-performance liquid chromatography), Pure Appl. Chem., 59, 625, 1987. 

Table 5.12 shows the main features of luminescence spectroscopy. The much higher sensitivity and specificity of luminescence techniques compared to absorption techniques is an obvious advantage for excitation spectra. In solution studies, pg ml. 1 levels can often be determined, as compared to p,gmL-1 levels in absorption spectroscopy. The greater sensitivity of luminescence techniques stems from the fact that the... 

Both the thermoluminescence and optically stimulated luminescence techniques are suitable for dating past heating events over a timespan ranging... 

Principle Plant enriched in secretory structures with biologically active secondary metabolites have fluorescing products in the cells and a location of the compounds could be observed using luminescent technique. 

TA Nieman. In WRG Baeyens, D De Keukeleire, K Korkidis, eds. Luminescence Techniques in Chemical and Biochemical Analysis. New York Marcel Dekker,... 

Real-Time Chemical Sensing Employing Luminescence Techniques... 

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