Analytically Correct Measurements of Dissolved Organic Matter in Seawater

9633296近年来，海洋化学家逐渐认识到，溶解有机碳(DOC)和溶解有机氮(DON)可能分别占海洋环境中总有机碳和氮的很大比例。甚至在知道这一点之前，这些科学家也意识到，由不同实验室分析DOC和DON的相同海水样本经常(如果不是通常的话)会产生不同的结果。在NSF赞助的前四年的研究中，首席研究员建立了海水标准参考材料和DOC的实验室间交叉比对。在这个项目中，他将继续非常成功的DOC海水标准计划，并为DON建立一个类似的标准化和相互校准项目。这项工作预计将有助于调整一些实验室的不符合标准的分析做法，以便能够汇编高质量的全球DOC/DON数据集，用于(例如)海洋碳和氮循环以及海洋化学-气候关系的全球规模研究。

9633296 Sharp In recent years marine chemists have come to realize that dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) may account for a significant portion of the total organic carbon and nitrogen respectively in the marine environment. Even before this was known, these scientists also realized that identical seawater samples analyzed by different laboratories for DOC and DON often, if not usually, yield disparate results. In four previous years of NSF-sponsored research, the principal investigator established a seawater standard reference material and an interlaboratory cross-comparison for DOC. In this project, he will continue the very successful DOC seawater standards program at a reduced level and establish a similar standardization and intercalibration project for DON. This work is expected to help bring substandard analytical practices in some laboratories into line so that global DOC/DON datasets of high quality can be assembled for use in global-scale studies of (for example) marine carbon and nitrogen cycling and ocean chemistry-climate relationships.