摘要：

the ions taken from the center of the ATD peak, and to is the amount of time the ion spends outside the drift cell before reaching the detector. A series of arrival times is measured by changing the voltage applied to the drift cell. A plot of tA versus p/V yields a straight line with a slope inversely proportional to Ko and an intercept of to. Once Ko is determined, the collisional cross section of the ion, , is calculated using eq 2

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