| 细菌反硝化法测定10–6级硝酸盐的氮和三氧同位素 |
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| 关键词:the denitrifier method nitrate nitrogen isotopes triple oxygen isotopes |
| 基金项目:国家自然科学基金项目(编号: 41473013; 41627802) |
| 作者 | 单位 | E-mail | | 范昌福 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室,自然资源部同位素地质重点实验室 | tjfchangfu@163.com | | 曲冬梅 | 中国科学院青藏高原研究所 | dm@itpcas.ac.cn | | 秦燕 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室,自然资源部同位素地质重点实验室 | | | 胡斌 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室,自然资源部同位素地质重点实验室 | | | 高建飞 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室,自然资源部同位素地质重点实验室 | | | 武晓珮 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室,自然资源部同位素地质重点实验室 | | | 李延河 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室,自然资源部同位素地质重点实验室 | |
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| 摘要: |
| Measurements of Nitrogen and Triple Oxygen Isotope Composition of Nitrate at 10–6 Level by the Denitrifier Method |
| The comprehensive study of nitrate nitrogen and trioxygen isotopes (δ15N, δ17O and δ18O) and mass independent fractionation (Δ17O) can more effectively trace the source and transformation processes of nitrate and restrict the formation conditions of nitrate. This paper describes in detail the analytical protocols and same key points for the analysis of ppm nitrate δ15N, δ17O and δ18O by the denitrifier method. Comprehensive optimization of the improved bacterial denitrification pretreatment method and fully automatic gas pre-concentration enrichment and purification system together with analyzing process have achieved long-term stability between two laboratories and good reproducibility of multiple batches of reference samples. The external precision of δ18O and δ15N of 10 nmol NO– 3 reference samples are 0.25‰ (1σ) and 0.40‰ (1σ) respectively. The external precision of δ18O, δ17O and δ15N of the 80 nmol NO– 3 reference samples are 0.5‰ (1σ), 0.4‰ (1σ) and 0.1‰ (1σ) respectively. In addition, the calculated external precision of Δ17O of the 80 nmol NO– 3 reference samples is 0.46‰ (1σ). |
| FAN Chang-fu,QU Dong-mei,QIN Yan,HU Bin,GAO Jian-fe,WU Xiao-pei,LI Yan-he.2020.Measurements of Nitrogen and Triple Oxygen Isotope Composition of Nitrate at 10–6 Level by the Denitrifier Method[J].Acta Geoscientica Sinica,41(5):591-604. |
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