References on time of concentration with respect to sheet flow

The 35Cl+ ions took 4.56 x 10–4 s to travel through the flight tube. Calculate the time taken for the 37Cl+ ions to travel through the same flight tube. Let’s work this out: t C l 37 = 37 35 t C l 35 . t C l 37 = 37 35 ×4.56× 10 -4 . t C l 37 =4.69× 10 -4 s . As expected, the 37Cl+ ion … ................
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