| 摘要 |
A new method for spatially separating and capturing ions type of different ionic mobility in a fluid medium, and an ion detection method and apparatus capable of newly utilizing this separating and capture method for high-sensitivity and high-resolution detection of ion species in tiny amounts within a fluid medium according to their ionic mobility. By overlapping an electrical field in the same direction as the flow direction, in a location with a decelerating flow having multiple ions, those ion species (ion 2, ion 3) having the specified range of ionic mobility, are captured at a position (z2, z3 each) where a drift speed (vd2, vd3 each) determined by the ionic mobility of each ion species and electrical field intensity is balanced by a flow speed (vf) changing in the flow direction of that flow location; and in this way ion species with different ionic mobility in a range specified by the balance position are spatially isolated in that direction and, captured in their respective flow directions.
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