In-syringe-stirring: A novel approach for magnetic stirring-assisted dispersive liquid-liquid microextraction
In-syringe-stirring: A novel approach for magnetic stirring-assisted dispersive liquid-liquid microextraction
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DOI：
10.1016/j.aca.2013.05.049
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发表时间：
2013-07-25
影响因子：
6.2
通讯作者：
Cerda, Victor
中科院分区：
文献类型：
--
作者：
Horstkotte, Burkhard;Suarez, Ruth;Cerda, Victor
第一次，在自动注射泵的注射器内使用磁力搅拌器和由此产生的可能的分析应用进行了描述。与顺序注射分析仪系统大致相同的简单仪器与适配器结合使用，适配器放置在玻璃注射器的针筒上。它围绕注射器的纵向轴线旋转并保持两个强钕磁体，产生旋转磁场并用作放置在注射器内部的磁性搅拌棒的驱动器。在第一项研究中，这种方法导致密封但也可自动适应的反应容器，注射器，在第二项研究中，在注射器中的磁性搅拌辅助分散液液微萃取将该系统应用于海水样品中铝的荧光分析，线性范围为1.1 μ mol L-1，检出限为6.1 nmol L-1，平均回收率为106.0%，重现性为4.4%。该程序持续210秒，包括注射器清洁，仅需要150 μ L己醇和4.1 mL样品。(C)2013爱思唯尔有限公司版权所有。
For the first time, the use of a magnetic stirrer within the syringe of an automated syringe pump and the resulting possible analytical applications are described. A simple instrumentation following roughly the one from sequential injection analyzer systems is used in combination with an adaptor, which is placed onto the barrel of a glass syringe. Swirling around the longitudinal axis of the syringe and holding two strong neodymium magnets, it causes a rotating magnetic field and serves as driver for a magnetic stirring bar placed inside of the syringe.In a first study it was shown that this approach leads to a sealed but also automatically adaptable reaction vessel, the syringe, in which rapid and homogeneous mixing of sample with the required reagents within short time can be carried out.In a second study in-a-syringe magnetic stirring-assisted dispersive liquid-liquid microextraction (MSA-DLLME) was demonstrated by the application of the analyzer system to fluorimetric determination of aluminum in seawater samples using lumogallion.A linear working range up to 1.1 mu mol L-1 and a limit of detection of 6.1 nmol L-1 were found. An average recovery of 106.0% was achieved for coastal seawaters with a reproducibility of 4.4%. The procedure lasted 210s including syringe cleaning and only 150 mu L of hexanol and 4.1 mL of sample were required. (C) 2013 Elsevier B.V. All rights reserved.