Abstract

Purpose The single-step sodium hydroxide–ethylenediaminetetraacetic acid (NaOH–EDTA) extraction is currently the most common preparation technique for the measurement of organic phosphorus (P) composition in sediments using solution 31P nuclear magnetic resonance (NMR). In this study, detailed investigations were conducted to evaluate the performance of this technique, with an objective of finding an optimal procedure for the measurement of sediment organic P.

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