流动注射在线共沉淀氢化物发生原子荧光光谱法测定地质样品中的痕量锡

[Determination of trace Sn in geosamples by flow injection on-line co-precipitation hydride generation atomic fluorescence spectrometry].

作者信息

Tan C H, Tang Z Y, Cao Z N, Yin S H

机构信息

Testing and Analytical Center, South China University of Technology, Guangzhou 510640, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2001 Oct;21(5):661-3.

PMID:12945324

Abstract

It is reported that a FI on-line co-precipitation technique for the pre-concentration of trace amount of Sn with the precipitate of Mg(OH)2 as carrier is hyphenated with AFS determination. The co-precipitation is carried out in NaOH medium and the precipitate is collected in a precipitation collector. The precipitate is then dissolved by HCl and reacted with NaBH4, the hydride is transferred directly into the atomizer. The relative standard deviation is 5.15% for 10 determinations of 30 ng.mL-1 Sn and the detection limit of 0.21 ng.g-1 is obtained. The developed method has been applied to the determination of trace Sn in geosamples with satisfactory results.

摘要

据报道，一种以氢氧化镁沉淀为载体对痕量锡进行预富集的流动注射在线共沉淀技术与原子荧光光谱法（AFS）测定联用。共沉淀在氢氧化钠介质中进行，沉淀在沉淀收集器中收集。然后沉淀用盐酸溶解并与硼氢化钠反应，氢化物直接转移至原子化器中。对30 ng·mL-1锡进行10次测定，相对标准偏差为5.15%，检出限为0.21 ng·g-1。所建立的方法已应用于地质样品中痕量锡的测定，结果令人满意。