摘要
There has been great interest in micro-chemical chips for miniaturizing chemical systems and integrating various chemical processes. These devices have many advantages, including a short analysis time ; a reduction of the sample, reagents, and waste volumes ; a more effective reaction due to the large specific interfacial area ; and a smaller space requirement. In order to realize general chemical processes in a microchip, including solvent extraction and reaction, etc., fluid controls of various solutions are important. However, multiphase parallel microflows become unstable due to small pressure fluctuations. In this paper, control methods of multiphase parallel microflows and micro solvent extraction using multiphase parallel microflows are introduced. Firstly, the fundamental physical properties in micro space are explained. Secondly, fluid control methods utilizing the fundamental physical properties are introduced. Thirdly, actual multiphase parallel microflows are introduced. Finally, micro solvent extraction using multiphase parallel microflows is introduced. © 2008 The Japan Society for Analytical Chemistry.