Dissolved organic matter (DOM) is an important component for the cycling of bioactive elements such as carbon, nitrogen, and phosphorus. However, confidence in the measurement of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) in marine systems is limited compared to inorganic nutrients due to complex analytical processes, the absence of certified standards, and the
... [Show full abstract] associated uncertainty of analytical results. To improve the latter issue, reference materials have been developed for DOC and total dissolved nitrogen and distributed by the Hansell laboratory at the University of Miami, but not yet for DON and DOP. Here we begin with a description and history of the DOC reference material (RM) program, then consider progress and needs in the development of RMs necessary for organic nutrients. Although currently available RMs for inorganic nutrients were expected to function as RMs for DOM, our previous work negates this option. We have sought an appropriate bottle container material for a DOM-RM, successfully for DOP but still to be developed for simultaneous achievement for DOC, DON, and DOP. We found a potential in both perfluoroalkoxy and glass bottles to achieve DOM-RM that remains to be examined. On the other hand, producing a single-purpose DOP-RM may make a significant contribution to elevating the comparability of DOP data, which are of growing interest among marine research communities.