渤海东海海洋沉积物中碳氮稳定同位素标准物质研制

发布时间：2018-03-03 06:56

本文选题：海洋沉积物　切入点：碳稳定同位素　出处：《岩矿测试》2017年01期 　论文类型：期刊论文

【摘要】：海洋沉积物中碳氮稳定同位素因其能够确定有机质的来源,有助于了解碳循环、气候变化、有机质迁移转化而备受关注,但其分析测试过程中尚缺乏海洋沉积物碳氮稳定同位素标准物质进行质量监控。本文依据ISO导则35和国家《一级标准物质技术规范》(JJG1006—1994),研制了三个海洋沉积物碳氮稳定同位素标准物质(MSCNI-1、MSCNI-2和MSCNI-3),候选物样品分别采自我国渤海锦州湾湿地、东海闽浙近岸和东海冲绳海槽,定值组分为总碳氮同位素(δ~(13)C-TC、δ~(15)N-TN)和有机碳氮同位素(δ~(13)C-C~(org)、δ~(15)N-N~(org)),定值方法采用元素分析-同位素比值质谱法(EA-IRMS)多家实验室协同定值。经检验,三个标准物质候选物均匀性良好,一年内定值组分均无显著变化,具有良好的稳定性;δ~(13)C和δ~(15)N的标准不确定度分别小于0.15%和0.24%,标准值和标准不确定度合理。该套标准物质是我国以海底沉积物为介质的基体型碳氮稳定同位素标准物质,定值方法准确可靠,可供海洋、地质及环境等相关领域实验室用于仪器校准、方法评价和质量监控等。
[Abstract]:The stable isotopes of carbon and nitrogen in marine sediments are of great concern for their ability to identify the source of organic matter, contribute to understanding the carbon cycle, climate change, and the migration and transformation of organic matter. However, the quality control of carbon and nitrogen stable isotopic reference materials in marine sediments is still lacking in the process of analysis and testing. According to ISO guideline 35 and National Technical Specification for First-Class Standard Materials, three marine sediments carbon and nitrogen have been developed in this paper. The stable isotopic reference materials (MSCNI-1, MSCNI-2 and MSCNI-3N) were collected from Jinzhou Bay Wetland, Bohai Sea, China, respectively. In the coastal area of the East China Sea, Fujian and Zhejiang, and the Okinawa trough in the East China Sea, the determined components are the total carbon and nitrogen isotopes (未 ~ (13) C ~ (TC)) and the organic carbon and nitrogen isotopes (未 ~ (13) C ~ (+) C ~ (+) ~ (1)) and the organic carbon and nitrogen isotopes (未 ~ (13) C ~ (C) ~ (1) C ~ (+) ~ (1)) or G ~ (1). The method of determining the values is determined by elemental analysis-isotope ratio mass spectrometry (EA-IRMS). The homogeneity of the candidates of the three reference materials was good, and no significant change was found in the components of the fixed values within one year. The standard uncertainty of 未 ~ (13) C and 未 ~ (15) N is less than 0.15% and 0.24, respectively, and the standard value and standard uncertainty are reasonable. The method is accurate and reliable. It can be used in the laboratory of ocean, geology and environment for instrument calibration, method evaluation and quality control.
【作者单位】：青岛大学环境科学与工程学院;国土资源部海洋油气资源和环境地质重点实验室青岛海洋地质研究所;
【基金】：国家自然科学基金资助项目(41406076) 中国地质调查局矿评专项(12120113022000)
【分类号】：P736.41

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