Estuarine organic matter composition as probed by direct temperature-resolved mass spectrometry and traditional geochemical techniques

Estuarine modification of terrestrial and riverine/estuarine organic matter may strongly affect the eventual preservation of reduced carbon in world oceans and is also important in nutrient and contaminant cycling. In this study multiple size classes of organic matter (including particles and dissolved fractions, POM and DOM) from a transect down the Delaware River/Bay system were collected and analyzed. Variations in chemical characteristics were identified using direct temperature-resolved mass spectrometry (DT-MS) and wet chemical techniques coupled with discriminant analysis and canonical correlations analysis. These comparative measures illustrate the complementary nature of traditional versus more recent mass spectrometry approaches.

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