Method of controlling liquid movement in a chemical device

摘要

A method of manufacturing a chemical device comprises, providing a first member (10) with a surface portion and a groove (18,20) located at the surface portion, and a second member (14) with a surface portion (16). A coating (34) which may be metallic or organic is provided on either the surface portion of the first or second member. The coating (34) is heated by combined convective heating and microwave irradiation. For a metallic coating (34) the heated coating bonds to the surface portion of the second member (14) so as to close the groove (18,20) to form a channel. For an organic coating the coating heats the surface portions of the two members to a temperature suitable to cause thermal connections. The organic coating then vaporises allowing the surface portions to contact and undergo thermal connection. A method of controlling hydrostatic and diffusion based flow of a liquid in a chemical device and a method of preparing a working solution of a desired concentration in a chemical device are also described.