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Table I Relative percentages of the total 31P NMR peak area represented by different P functional groups in samples from different depths in sites 1 and 2

From: Polyphosphates as a source of enhanced P fluxes in marine sediments overlain by anoxic waters: Evidence from 31P NMR

Site 1 P esters Phosphonate Polyphosphate
0–1 cm 94 6 0
15–16 cm 86.6 13.4 0
Site 2    
1–2 cm 82 10 8
13–14 cm 85 15 0