Extraction of phosphorus in natural waters and sediments by ignition method

	Extraction of phosphorus in natural waters and sediments by ignition method
	Zhou, Y; Zhang, FS; Yang, HS; Ma, XN
	2002-07-01
发表期刊	CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
ISSN	0253-3820
卷号	30 期号:7 页码:861-864
文章类型	Article
摘要	Phosphorus recoveries from selected inorganic and organic P-containing compounds after ignition with auxiliaries, such as MgSO4, Mg (NO3)(2), MgCl2, Mg (Ac)(2) and CaCl2 were studied. It was found that the phosphorus could not be completely recovered when most P-containing compounds were ignited with MgSO4 at temperature not higher than 500degreesC if the baked residue was extracted with 0.2 mol/L HCl for 30 min at 80degreesC or at room temperature. In contrast, MgCl2, Mg(Ac)(2) and CaCl2, as well as Mg(NO3)(2), could all yield complete P recoveries. We suggest that MgCl2 rather than MgSO4, which is usually used, should be utilized as ashing auxiliary agent in the P extraction by ignition method. Although Mg (NO3)(2) is a highly effective auxiliary agent, yet interference from MgSO4, danger of explosion, toxicity of nitrogen dioxide and more manipulation steps may limit its widespread utilization. It is suggested that if sediment is ignited with MgCl2, the extraction of residue with 0.2 mol/L HCl for 30 min at 80degreesC could give good result.; Phosphorus recoveries from selected inorganic and organic P-containing compounds after ignition with auxiliaries, such as MgSO4, Mg (NO3)(2), MgCl2, Mg (Ac)(2) and CaCl2 were studied. It was found that the phosphorus could not be completely recovered when most P-containing compounds were ignited with MgSO4 at temperature not higher than 500degreesC if the baked residue was extracted with 0.2 mol/L HCl for 30 min at 80degreesC or at room temperature. In contrast, MgCl2, Mg(Ac)(2) and CaCl2, as well as Mg(NO3)(2), could all yield complete P recoveries. We suggest that MgCl2 rather than MgSO4, which is usually used, should be utilized as ashing auxiliary agent in the P extraction by ignition method. Although Mg (NO3)(2) is a highly effective auxiliary agent, yet interference from MgSO4, danger of explosion, toxicity of nitrogen dioxide and more manipulation steps may limit its widespread utilization. It is suggested that if sediment is ignited with MgCl2, the extraction of residue with 0.2 mol/L HCl for 30 min at 80degreesC could give good result.
关键词	Ignition Method Recovery Phosphorus Phosphorus-containing Compounds Ashing Auxiliary Agents
学科领域	Chemistry, Analytical
收录类别	SCI
语种	英语
WOS记录号	WOS:000177291200025
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2824
专题	海洋生态与环境科学重点实验室
作者单位	Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Y,Zhang, FS,Yang, HS,et al. Extraction of phosphorus in natural waters and sediments by ignition method[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,2002,30(7):861-864.
APA	Zhou, Y,Zhang, FS,Yang, HS,&Ma, XN.(2002).Extraction of phosphorus in natural waters and sediments by ignition method.CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,30(7),861-864.
MLA	Zhou, Y,et al."Extraction of phosphorus in natural waters and sediments by ignition method".CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 30.7(2002):861-864.

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