partial characterization of the dissolved organic phosphorus pool in the oligotrophic North Pacific Ocean

摘要

The combined application of two independent methods for phosphorus (P) determination in seawater, continuous- flow UV photodecomposition and magnesium-induced coprecipitation (MAGIC0, was used to provide a partial char- acterization of the dissolved P pools at Sta. ALOHA (22°45'N, 158°W) in the oligotrophic subtropical North Pacific ocean. Comprehensive laboratory analyses of the UV light-induced photodecomposition of a variety of specific organic p compounds dissolved in seawater confirmed that submicromolar concentrations of monophosphate compounds could be analytically separated from nucleotide di- and triphosphates based upon a previously described temperture-con- trolled low-pressure, mercury vapor UV irradiation treatment.