Table 3.

Drift Tube Ion Mobility Spectrometry Parameters.

Parameter	Value
Trap Fill	10000 μs
Trap Release	100 μs
Drift Tube Entrance (Single-Field only)†	1574 V
Drift Tube Exit	224 V
Rear Funnel Entrance	217.5 V
Rear Funnel Exit	45 V
Maximum Allowed Drift Time	60 ms

Voltages shown were those used for positive mode, while negative polarity mode utilized the negative values of each.

^†Drift tube entrance voltage was used for all replicates in the single field method. For the stepped field method values for the APCI(-) tune mix ions analyses, please consult the main text.