The quality control of oceanic carbon dioxide measurements: preparation and distribution of reference materials

海洋二氧化碳测量的质量控制：标准物质的制备和分发

• 批准号: 1233648
• 负责人: Andrew Dickson
• 金额: $ 41.21万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-04-01 至 2018-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1233648&HistoricalAwards=false
• 关键词: quality; control; oceanic; carbon; dioxide

The goal of this project is to provide a mechanism for the quality control of the oceanic carbon dioxide measurements, in particular those that are made as part of international global programs. This will help to ensure that such measurements are comparable and accurate although made in different laboratories at different times; and will be an important factor in the design of a Global Ocean Observing System, as well as playing a significant role in the quality control of ocean acidification measurements. To achieve this, a research team at the Scripps Institute of Oceanography of the University of California at San Diego will prepare and certify reference materials for the parameters of the oceanic carbon dioxide system: total dissolved inorganic carbon, total alkalinity, and hydrogen ion concentration, pH, for a sample of sea water. The reference materials for total dissolved inorganic carbon and for total alkalinity will be based on natural seawater, sterilized, bottled, and analyzed using appropriate reference methods for these parameters. Reference materials for pH will be based on Tris buffers in synthetic seawater and analyzed using classical Harned cells. In addition, they will distribute calibrated acid titrant for alkalinity measurements. These reference materials will be distributed to US and to international investigators to assist in the quality control of oceanic CO2 measurements. During the three years of this project, the team expects to distribute at least 25,000 bottles of reference material. These materials will also be used to provide test samples for use in collaborative studies of the analytical methods used to determine these various parameters. An important part of the project involves planning for the future. The team will work to improve the packaging currently used for the reference materials so as to make it significantly more convenient. The principal investigator will also interact with the US National Institute for Standards and Technology (NIST) to ensure that the current process for preparing and certifying reference materials is appropriately documented. It is essential to assure a long-term supply of reference materials for future ocean science research, and it will be necessary to identify an agency or company that will take on this responsibility. The principal investigator will work with NIST to recommend a plan for the future and will also work to investigate possibilities outside the US, in Europe or Japan. Broader Impacts: The provision of reference materials to the international community helps to improve the overall quality of oceanic carbon data around the world both for field studies of the distribution of oceanic carbon, as well as for studies related to ocean acidification. Thus it is a significant US contribution to research infrastructure in this field. Education: The existence of such a laboratory at a major US oceanographic institution ensures that undergraduate students and graduate students that work in the lab alongside this reference material program benefit from the education in high-quality analytical techniques that is part and parcel of such a program, and also from the ancillary discussions associated with quality control and quality assurance. It also provides a resource for other students in the institution who are interested in making high-quality carbon measurements as part of their research. The principal investigator is also called on to instruct others in CO2 measurements, both by telephone or e-mail conversations, and also in more formal courses. Outreach: The principal investigator will be involved in a number of public outreach efforts related to his research studies on the ocean carbon system. In particular, he expects to continue to make a number of public presentations in the area of ocean acidification, as well as to work with various groups such as the State of California and the California Current Acidification Network to improve the capacity of such groups to make high-quality CO2 measurements.

该项目的目标是为海洋二氧化碳测量提供一种质量控制机制，特别是那些作为国际全球计划一部分的海洋二氧化碳测量。这将有助于确保这些测量虽然在不同时间在不同实验室进行，但具有可比性和准确性；它将是设计全球海洋观测系统的一个重要因素，并在海洋酸化测量的质量控制方面发挥重要作用。为了实现这一目标，加州大学圣地亚哥分校斯克里普斯海洋学研究所的一个研究小组将准备并认证海洋二氧化碳系统参数的参考材料：海水样本的总溶解无机碳、总碱度和氢离子浓度、pH值。总溶解无机碳和总碱度的标准物质将以天然海水为基础，经过灭菌、装瓶，并采用适当的参考方法对这些参数进行分析。pH的参考物质将基于合成海水中的Tris缓冲液，并使用经典的Harned细胞进行分析。此外，他们将分配校准的酸滴定剂的碱度测量。这些参考材料将分发给美国和国际调查人员，以协助控制海洋二氧化碳测量的质量。在这个项目的三年中，该团队预计将分发至少25,000瓶参考材料。这些材料还将用于提供测试样品，用于用于确定这些不同参数的分析方法的合作研究。这个项目的一个重要部分涉及到对未来的规划。该团队将努力改进目前用于参考材料的包装，使其更加方便。首席研究员还将与美国国家标准与技术研究所（NIST）进行互动，以确保当前准备和认证标准物质的过程被适当地记录下来。必须确保为今后的海洋科学研究长期提供参考材料，并有必要确定将承担这一责任的机构或公司。首席研究员将与NIST合作，为未来的计划提出建议，并将努力调查美国以外、欧洲或日本的可能性。更广泛的影响：向国际社会提供参考材料有助于提高世界各地海洋碳数据的总体质量，无论是用于海洋碳分布的实地研究，还是用于与海洋酸化有关的研究。因此，这是美国对该领域研究基础设施的重大贡献。教育：在美国主要的海洋学机构中，这样一个实验室的存在确保了在实验室工作的本科生和研究生在这个参考材料项目中受益于高质量分析技术的教育，这是这个项目的重要组成部分，也受益于与质量控制和质量保证相关的辅助讨论。它还为该机构的其他学生提供了一个资源，这些学生对高质量的碳测量感兴趣，作为他们研究的一部分。首席研究员还被要求指导其他人进行二氧化碳测量，既可以通过电话或电子邮件交谈，也可以在更正式的课程中进行。外联：首席研究员将参与一些与他对海洋碳系统的研究相关的公共外联工作。特别是，他希望继续在海洋酸化领域做一些公开演讲，并与加利福尼亚州和加州洋流酸化网络等各种团体合作，提高这些团体进行高质量二氧化碳测量的能力。