The eect of laser wavelength and power density on the laser desorption mass spectrum of fulvic acid


Fulvic acid (FA) is a water-soluble component of natural organic matter whose environmental and organic geochemistry is routinely correlated to its molecular weight. In an attempt to examine the usefulness of laser desorption (LD) mass spectrometry to unambiguously determine this characteristic, laser wavelengths of 10.6 mm, 1.06 mm and 355 nm were… (More)


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