Chemical Reference Materials: Setting the Standards for Ocean Science is part of an evolving body of work being conducted by scientists and research sponsors interested in ensuring the quality control of oceanographic data. Chemical data collected during ongoing and future global oceanographic studies and time-series efforts must be comparable over time and among laboratories. A wide range of scientific opportunities will result from such long-term observations, such as a better understanding of the role of ocean chemistry in climate dynamics; also improved stewardship of the ocean’s natural resources