| 灰化法磷测定中不同灰化助剂的效果比较 |
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| 引用本文： | 周毅,张福绥,杨红生,马锡年.灰化法磷测定中不同灰化助剂的效果比较[J].分析试验室,2001,20(6):58-61. |
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| 作者姓名： | 周毅 张福绥 杨红生 马锡年 |
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| 作者单位： | 中国科学院海洋研究所, |
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| 基金项目： | 国家重点基础研究规划项目G19990 12 0 12，国家自然科学基金项目 (30 10 0 139，30 170 742 )，国家重点科技项目 (攻关项目 ) 96 92 2 0 2 0 4 |
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| 摘 要： | 以磷酸二氢钠和磷酸氢二钠与脱氧腺苷三磷酸（dATP)的混合溶液为磷标样，比较了MgSO4,Mg(NO3)2和MgCl2等灰化助剂的作用效果。结果发现，磷标样中加入MgSO4经500℃灼烧后用0.2mol/L HCl于80℃浸提残渣0.5h不能使磷全部回收；而MgCl2、Mg(NO3)2、MgAc2、CaCl2等助剂，却都能使灼烧后的磷完全回收。在采用MgSO4高温灰化法分析海水中的颗粒磷和总磷或有机体中的磷时，应当用MgCl2作为灰化助剂取代MgSO4。尽管Mg(NO3)2也是高效的灰化辅助剂，但其应用的危险性有较多的手工操作限制了它的广泛应用。
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| 关 键 词： | 磷 灰化法 测定 灰化助剂 标准确磷化合物 生物样品 分析 |
| 文章编号： | 1000-0720(2001)06-0058-04 |
A comparison of efficacy of different auxiliaries used in determination of phosphorus by ashing |
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| ZHOU Yi,ZHANG Fu sui,YANG Hong sheng and MA Xi nian.A comparison of efficacy of different auxiliaries used in determination of phosphorus by ashing[J].Chinese Journal of Analysis Laboratory,2001,20(6):58-61. |
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| Authors: | ZHOU Yi ZHANG Fu sui YANG Hong sheng and MA Xi nian |
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| Abstract: | A comparison of efficacy of different auxiliaries used in determination of phosphorus by ashing method with mixtures of NaH 2PO 4, NaH 2PO 4 and dATP as standard phosphorus samples was made. Phosphorus could not be completely recovered when standard phosphorus ashing with MgSO 4 as an auxiliary. In contrast, auxiliaries of MgCl 2, Mg(NO 3) 2, MgAc 2 and CaCl 2 could make the phosphorus to be recovered completely. We suggest that MgCl 2 rather than MgSO 4, which is usually used, should be used as ashing auxiliary in the phosphorus determination with ashing method. |
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| Keywords: | Phosphorus Ashing determination method Ashing auxiliaries Standard phosphorus compounds |
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