| 灰化法磷测定中不同灰化助剂的效果比较:以焦磷酸钠作为磷标样 |
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| 引用本文： | 周毅,张福绥,马锡年,杨红生,何义朝.灰化法磷测定中不同灰化助剂的效果比较:以焦磷酸钠作为磷标样[J].海洋学报,2001,23(5):58-64. |
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| 作者姓名： | 周毅 张福绥 马锡年 杨红生 何义朝 |
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| 作者单位： | 中国科学院海洋研究所, 山东, 青岛, 266071 |
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| 基金项目： | 国家重点基础研究规划资助项目(G1999012012);中国科学院知识创新工程资助项目(KZCX2-403);国家重点科技资助项目(96～922-02-04). |
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| 摘 要： | 对Na4P2O7加入不同灰化助剂经不同温度(200～550℃)灼烧后磷的回收率进行了研究.所研究的灰化助剂除文献中已深入研究过的MgSO4和Mg(NO3)2外,还对MgCl2等10余种盐试剂进行了实验.结果表明,除Mg(NO3)2外,MgCl2,MgAc2,CaCl2,Ca(NO3)2等均能使Na4P2O7灰化后的磷完全回收(灼烧温度不低于450℃),而加入MgSO4在任何灼烧温度下磷的回收率均低于80%,效果不佳.因此,在利用目前已被广泛应用的由Solrzno和sharp所提出的方法去分析海水中颗粒磷和总磷或有机体中的磷时,应当用MgCl2(或MgAc2)作为灰化助剂来取代MgSO4.
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| 关 键 词： | 磷测定 灰化法 Na4P2O7 灰化助剂 |
| 文章编号： | 0253-4193(2001)05-0058-07 |
| 收稿时间： | 2000/2/24 0:00:00 |
| 修稿时间： | 2000年2月24日 |
A comparison of efficiency of different assistants used in phosphorus determination by ignition method with Na4p2O7 as standard phosphorus |
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| ZHOU Yi,ZHANG Fu-sui,MA Xi-nian,YANG Hong-sheng and HE Yi-chao.A comparison of efficiency of different assistants used in phosphorus determination by ignition method with Na4p2O7 as standard phosphorus[J].Acta Oceanologica Sinica (in Chinese),2001,23(5):58-64. |
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| Authors: | ZHOU Yi ZHANG Fu-sui MA Xi-nian YANG Hong-sheng and HE Yi-chao |
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| Institution: | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China |
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| Abstract: | Resear ches on phosphorus recoveries from sodiumpy rophosphate(Na4P2O7) after ignition at temper ature from 200 to 550℃ with auxiliary,such as MgSO4,Mg(NO3)2,MgCl2,MgAc2,CaCl2,Ca(NO3)2 and so on,are finished.The results indicate that MgSO4 gives poor phosphorus recovery at any ignition temperature from 200 to 550℃,when the final residue is extracted with 0.2 mol/dm3 HCl at 80℃ for 30 min.By contrast,Mg(NO3)2, MgCl2,MgAc2,CaCl2 and Ca(NO3)2 give very good phosphorus recovery with ignition temperature being equal to or greater than 450℃.It is sugg ested that MgCl2(or MgAc2) rather than MgSO4 can be used as ashing assistant in the phosphorus determination by ignition method. |
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| Keywords: | phosphorus determination ignition method Na 4P 2O 7 ashing assistant |
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