Chemical Composition of Marine Dissolved Phosphorus: Characterization by NMR and Chemical Analysis

Ingall 9730159溶解有机物(DOM)在海洋有机碳循环中的重要性现在得到了广泛的认识。DOM中的必需营养磷是藻类和微生物代谢的重要磷来源，但对溶解有机磷(DOP)的化学组成和循环知之甚少。国际海洋研究所INGALL建议研究沿海和开阔海域DOP和颗粒物OP的化学成分和结构。工作将集中在用切向流超滤器分离的DOP池中的那部分，因此预计代表DOP的胶体或高相对分子质量部分。样本将从以前收集的和新收集的野外样本以及受控的实验室培养和分解实验中获得。这些样品将使用新开发的31P核磁共振技术进行分析。这项研究的结果有望导致对有机磷化合物的量化和鉴定，从而为更全面地了解海洋中的磷循环迈出重要的一步。英格尔(OCE-9730159)

Ingall 9730159 The importance of dissolved organic matter (DOM) in marine organic carbon cycling is now widely recognized. The essential nutrient phosphorus in DOM is potentially a significant source of P for algal and microbial metabolism, however little is known about the chemical composition and cycling of dissolved organic phosphorus (DOP). The PI, Ingall, proposes to study the chemical composition and structure of DOP and particulate OP in the coastal and open oceans. Efforts will be focused on that fraction of the DOP pool that is isolated with a tangential-flow ultrafilter, and hence is expected to represent the colloidal or high molecular weight fraction of DOP. Samples will be obtained from previously collected and newly collected field samples, as well as from controlled laboratory culturing and decomposition experiments. These samples will be analyzed using newly developed 31P NMR techniques. The results of this study are expected to lead to the quantification and identification of organic P compounds, and are thus an important step in gaining a more complete understanding of P cycling in the oceans. Ingall (OCE-9730159)