. Author manuscript; available in PMC: 2014 Jan 2.

Published in final edited form as: Anal Chem. 2012 Dec 17;85(1):10–13. doi: 10.1021/ac3029129

Table 1.

Calculated and measured temperatures (°C) for ubiquitin ions in FAIMS

Conditions	Mean T_I (measured)^a	For compact geometries^b		For elongated geometries^b
Conditions	Mean T_I (measured)^a	<T_I>	T_max	<T_I>	T_max
E_D = 20 kV/cm, N₂	70	34 – 38	78 – 93	30 – 33	58 – 74
E_D = 28 kV/cm, N₂	92	45 – 48	129 – 142	38 – 44	93 – 123
E_D = 28 kV/cm, He/N₂	125	54 – 58	167 – 185	43 – 52	118 – 159

Weighted averages of T_I from matching DTIMS data for all charge states with multiple peaks.

The temperatures in N₂ calculated assuming the mobilities measured (Ref. [15]) at peak apexes for z = 6 – 10, that is K₀ = 1.02 – 1.18 cm²/(Vs) for “compact” families and 0.83 – 0.99 cm²/(Vs) for elongated ones. The mobilities in 1:1 He/N₂ were estimated from the values in N₂ and He via the Blanc’s law (Ref. [18]).