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| 利用31P核磁共振技术优化太湖沉积物有机磷的化学提取方法 | |
| 引用本文： | 白秀玲,周云凯,李斌,丁士明.利用31P核磁共振技术优化太湖沉积物有机磷的化学提取方法[J].环境科学学报,2011,31(5):996-1003. |
| 作者姓名： | 白秀玲 周云凯 李斌 丁士明 |
| 作者单位： | 1. 河南大学资源与环境研究所,开封,475004;中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京,210008 2. 河南大学资源与环境研究所,开封,475004 3. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京,210008 |
| 基金项目： | 国家自然科学基金面上项目 |
| 摘 要： | 以太湖沉积物为研究对象,采用钼酸铵比色方法与液相31P-核磁共振技术(31P-NMR),研究不同浓度NaOH及NaOH与EDTA不同配比(NaOH-EDTA)对沉积物有机磷的提取及31P-NMR组成分析的影响.结果表明:不同浓度NaOH或不同配比的NaOH-EDTA,其提取沉积物总磷和有机磷量均随溶液pH值的增加而增加... |
| 关 键 词： | 有机磷 沉积物 NaOH-EDTA 31P-核磁共振 |
| 收稿时间： | 7/21/2010 9:02:44 AM |
| 修稿时间： | 2010/8/26 0:00:00 |
Optimizing chemical extraction of organic phosphorus from sediment using 31P nuclear magnetic resonance spectroscopy |
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| BAI Xiuling,ZHOU Yunkai,LI Bin and DING Shiming.Optimizing chemical extraction of organic phosphorus from sediment using 31P nuclear magnetic resonance spectroscopy[J].Acta Scientiae Circumstantiae,2011,31(5):996-1003. | |
| Authors: | BAI Xiuling ZHOU Yunkai LI Bin and DING Shiming |
| Institution: | 1. Institute of Natural Resources and Environment, Henan University, Kaifeng 475004; 2. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008,Institute of Natural Resources and Environment, Henan University, Kaifeng 475004,State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008 and State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008 |
| Abstract: | Procedures for chemical extraction of organic phosphorus (OP) from sediments of Taihu Lake were optimized using solution 31P nuclear magnetic resonance spectroscopy (31P-NMR). The results showed that the extraction efficiencies for total phosphorus and OP increased with pH when NaOH and EDTA were used as solutes. The extraction efficiency of NaOH-EDTA was significantly higher than that of NaOH alone. The mixture of 0.25 mol·L-1 NaOH and 50 mmol·L-1 EDTA was the best extractant for OP extraction, as evidenced by the 31P-NMR spectrum. The release of sediment-bound OP in chemical extraction could be attributed to the double effects of OH- competition under strong alkaline conditions and EDTA chelation for metal ions. It should be noticed that the chelation of metal ions with EDTA simultaneously increased the extraction of magnetic ions (such as Fe3+ and Mn2+) from sediment, which may result in interferences, such as peak overlap on the 31P-NMR spectrum. |
| Keywords: | organic phosphorus sediment NaOH-EDTA 31P-NMR |
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