Liquid switch, and microchip and mass-analyzing system using the same

摘要

A liquid sample ( 104 ) introduced in a main flow passage ( 101 ) is held in a dam portion ( 105 ), and a trigger liquid ( 106 ) is filled in a trigger flow passage ( 102 ). In this state, the trigger liquid ( 106 ) is further introduced at desired timing into the trigger flow passage ( 102 ) so that the front end portion of the level of the trigger liquid ( 106 ) is advanced and the front end portion is brought to be into contact with the dam portion ( 105 ). This causes the liquid sample ( 104 ) to move to the right (downstream side) in the figure, resulting in the liquid sample ( 104 ) flowing out to the downstream side of the main flow passage ( 101 ). This means that the trigger liquid ( 106 ) provides priming to realize a liquid switch.