Spectrophotometric Analysis of Fulvic Acid Solutions - A Second Look

by Elham A. Ghabbour and Geoffrey Davies

...Spectrophotometric measurements of aqueous solutions of three IHSS standard FAs at pH 1.0 and 4.0 indicate that optical absorbances decrease exponentially with increasing wavelength...used to develop a simple analytical method that has potential value for certification and regulation of humic substances.

Systematic Approaches to Comprehensive Analyses of Natural Organic Matter

by Jerry A. Leenheer

...The objective of this [major] account is to present a number of comprehensive, systematic approaches to NOM analyses in a variety of soil, sediment, water, atmosphere, and rock environments...is primarily based on analytical organic chemistry, but relevant information ...

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