Isolation and determination of inositol hexaphosphate in sediments from Tokyo Bay (original) (raw)
1993, Geochimica Et Cosmochimica Acta
Inositol hexaphosphate (IP 6) was isolated from Tokyo Bay sediments and studied by a combined technique of hypobromite oxidation, anion-exchange chromatography. 1H nuclear magnetic resonance, and gas chromatography. The concentrations of IP 6 in surface sediments (0-2.5 cm) range from 0.06 to 0.20 μmol · P/g, and average 0.12 μmol · P/g, a small portion of the total organic phosphorus (<2.2%). Three types of IP 6 isomers were identified: myo-≫ scyllo-> chiro-IP 6 in order of their abundance, similar to that reported for soils. It was confirmed by laboratory experiments that IP 6 is susceptible to biological degradation and disappears quickly before and during burial under marine conditions. This result strongly supports the low concentrations of IP 6 observed in Tokyo Bay sediments and suggests that IP 6 is not a significant component of refractory organic-P in marine sediments.
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