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By testing a series of solution 31P-NMR spectroscopy of model phosphorus compounds including inorganic phosphate, orthophosphate monoesters and diesters, and organic polyphosphate(determined in 1mol/L NaOH and 16.7% D2O), standard phosphorus spectra were obtained as references for solution 31P-NMR studies of sediment phosphorus. The results showed that the 31P-NMR signals of phosphorus compounds interested in environmental studies generally fall between 6.5×10-6 and -25×10-6, including orthophosphate at 6.412×10-6, pyrophosphate at -4.353×100-6, polyphosphate at -18.159×10-6 to -20.246×10-6 (middle group P) and -3.53×10-6 to -4.40×10-6 (terminal P), orthophosphate monoesters at 4.3540×10-6 to 6.3652×10-6, orthophosphate diesters at -0.107×10-6 to 2.195×10-6, and organic polyphosphate at -8.833×10-6 to 9.499×10-6 for the a-P. Structure surroundings effect the chemical shifts of phosphorus compounds.

Characterizing phosphorus in environmental model samples by <sup>31</sup>P-NMR