Sobeck & Ebeling: Mass Spectrometric Analysis for Phosphate in Soil Extracts


Phosphate (P) was extracted from soil samples using common soil extraction techniques: deionized water (DI) and ammonium oxalate (AmOx). Colorimetry (Murphy Riley), electrospray ionization mass spectrometry (ESI-MS), and inductively coupled plasma (ICP) were used in the P analysis. Mass spectrometry measured considerably more phosphate than colorimetric… (More)


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