Ion-Exchange Method for Nitrogen Isotope Analysis of Nitrate in Soil | |
Hu, J (Hu, Jing)[ 1 ]; Liu, WG (Liu, Weiguo)[ 1,2 ] | |
2014-05-15 | |
发表期刊 | SOIL SCIENCE SOCIETY OF AMERICA JOURNAL |
卷号 | 78期号:3页码:787-793 |
文章类型 | 期刊论文 |
摘要 | The N isotopic composition of nitrate in soil extraction samples can deliver critical information regarding the soil N cycle for biogeochemical processes. Here, we present a preparatory ion-exchange resin method for the N isotope analysis of NO3- in saturated CaSO4 soil extracts. This method showed that the NO3- in saturated CaSO4 soil extracts could be effectively separated from SO42- and other anions to avoid interference from the large amounts of coexisting anions in soil extracts. The nitrate recovery rate ranged from 95.54 to 105.04%. The resulting average natural abundance of N-15 (delta N-15) values of the KNO3 solutions and the KNO3-CaSO4 solutions were +6.04 +/- 0.03 parts per thousand (n = 6) and +6.03 +/- 0.12 parts per thousand (n = 6), respectively. The average delta N-15 value of the KNO3 salt was +6.07 +/- 0.06 parts per thousand (n = 12). Therefore, we concluded that N isotopic fractionation did not occur throughout the process. In addition, the delta N-15-NO3- values of natural soils extracted using saturated CaSO4 were reproducible between separate analytical runs. The standard deviations of the delta N-15-NO3- for the three different soils were +/- 0.17 parts per thousand (n = 4), +/- 0.04 parts per thousand (n = 3), and +/- 0.34 parts per thousand (n = 3). Our ion-exchange method was effective at separating NO3- from other anions in the soil extracts and was suitable for measuring the delta N-15-NO3 of saturated CaSO4 soil extracts. |
DOI | 10.2136/sssaj2013.11.0478 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/9728 |
专题 | 加速器质谱中心 |
通讯作者 | Liu, WG (Liu, Weiguo)[ 1,2 ] |
作者单位 | 1.State Key Lab. of Loess and QuaternaryGeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710075P. R. China; 2.School of Human Settlement and Civil Eng.Xi’an Jiaotong Univ.Xi’an 710049P.R. China |
推荐引用方式 GB/T 7714 | Hu, J ,Liu, WG . Ion-Exchange Method for Nitrogen Isotope Analysis of Nitrate in Soil[J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,2014,78(3):787-793. |
APA | Hu, J ,&Liu, WG .(2014).Ion-Exchange Method for Nitrogen Isotope Analysis of Nitrate in Soil.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,78(3),787-793. |
MLA | Hu, J ,et al."Ion-Exchange Method for Nitrogen Isotope Analysis of Nitrate in Soil".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 78.3(2014):787-793. |
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