Water MAGIC 60 analysis

Rose K. A., Cook R. B., Brenkert A. L., Gardner R. H., and Hettelingh J. P. (1991b) Systematic comparison of ILWAS, MAGIC, and ETD watershed acidification models 2. Monte Carlo analysis under regional variability. Water Resour. Res. 27, 2591-2603. 

Lists of useful matrices for FAB are available and their physical and chemical properties have been compiled. In the authors laboratory where FAB is still routinely applied to the analysis of plant secondary metabolites such as saponins, flavonoid glycosides, fatty acid derivatives and small synthetic peptides Mj.< 3000), two matrices are mainly used glycerol, in the analysis of polar hydrophilic compounds and m-nitrobenzylalcohol (m-NBA) for lipophilic compounds. When glycerol is selected the sample is first dissolved in a cosolvent, methanol or a methanol-water mixture, while in the case of m-NBA dichloromethane is employed as cosolvent to facilitate addition of the sample to the matrix. It is a misconception that FAB can only be applied to the analysis of polar analytes lipophilic compounds such as fatty acids and their derivatives are well amenable to FAB analysis if a lipophilic matrix is selected. Other matrices that have often been employed in peptide analysis include thioglycerol and a eutectic mixture of dithiothreitol and dithioerythritol (3 1, w/w), known as magic bullet . For negative ion FAB the basic matrices di- and triethanolamine have also been used. 

The last interesting system is the formation and ordering of gold nanoparticles at the toluene-water interface through a reduction reaction. The XR analysis combined with diffuse scattering analysis showed the formation of a monolayer of magic clusters at the water-toluene interface. The electron density profile of the monolayer of these clusters exhibits three layers of nanopartides as a function of depth that evolves with time. Each cluster consists of 13 nanopartides with diameters of about 12 A. 

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