Determination for the different combined-form inorganic carbon in marine sediments
文献类型：期刊论文
| 作者 | Li, XX; Li, N; Song, JM
|
| 刊名 | CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
 |
| 出版日期 | 2004-04-01 |
| 卷号 | 32期号:4页码:425-429 |
| 关键词 | Inorganic Carbon Sequential Extract Marine Sediments |
| ISSN号 | 0253-3820 |
| 文献子类 | Article |
| 英文摘要 | Marine sediment is the important sources and sinks of carbon. The inorganic carbon(IC) in marine sediments plays an important role in carbon cycling. In order to understand IC function in carbon cycling, sequential extraction method based on IC combined chemical strength difference were established to get five phases: NaCl phase (step I), NH3 - H2O phase (step II), NaOH phase (step III), NH2OH . HCl phase (step IV) and HCl phase(step V). The best extraction conditions were obtained by a series of experiments. Extractants were added into plastic centrifuge tubes in Step I - M, the capped tube were placed on a shaker table to keep the solids suspended for two hours. The suspended solution was separated by centrifugal, the residues were washed with water. The two supernatant were combined and the CO, was finally determined by volumetric analysis. The residues were transferred into conical flask in step IV and V, and then the extractants were added. The produced CO2 was adsorbed by saturated Ba(OH)(2) solution, and determined by volumetric analysis. This method for IC has a good precision in the analysis sediment samples.; Marine sediment is the important sources and sinks of carbon. The inorganic carbon(IC) in marine sediments plays an important role in carbon cycling. In order to understand IC function in carbon cycling, sequential extraction method based on IC combined chemical strength difference were established to get five phases: NaCl phase (step I), NH3 - H2O phase (step II), NaOH phase (step III), NH2OH . HCl phase (step IV) and HCl phase(step V). The best extraction conditions were obtained by a series of experiments. Extractants were added into plastic centrifuge tubes in Step I - M, the capped tube were placed on a shaker table to keep the solids suspended for two hours. The suspended solution was separated by centrifugal, the residues were washed with water. The two supernatant were combined and the CO, was finally determined by volumetric analysis. The residues were transferred into conical flask in step IV and V, and then the extractants were added. The produced CO2 was adsorbed by saturated Ba(OH)(2) solution, and determined by volumetric analysis. This method for IC has a good precision in the analysis sediment samples. |
| 学科主题 | Chemistry, Analytical |
| 语种 | 英语 |
| WOS记录号 | WOS:000221218100003 |
| 公开日期 | 2010-12-22 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/2731]  |
| 专题 | 海洋研究所_海洋生态与环境科学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, XX,Li, N,Song, JM. Determination for the different combined-form inorganic carbon in marine sediments[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,2004,32(4):425-429. |
| APA | Li, XX,Li, N,&Song, JM.(2004).Determination for the different combined-form inorganic carbon in marine sediments.CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,32(4),425-429. |
| MLA | Li, XX,et al."Determination for the different combined-form inorganic carbon in marine sediments".CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 32.4(2004):425-429. |
入库方式： OAI收割
来源：海洋研究所
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