An ion mobility spectrometer has a reaction region (5) separated from a drift region (20) by an electroststic gate (21). A doping circuit (8) supplies a dopant to the reaction region (5) but the drift region (20) is undoped. Two high field ion modifiers (30 and 31) are located one after the other in the drift region (20). One modifier (30) can be turned on to remove dopant adducts from the admitted ions or both (30 and 31) can be turned on so that the ions are also fragmented. In this way, several different responses can be produced to provide additional information about the nature of the analyte substance and distinguish from interferents.
申请公布号
WO2008110754(A3)
申请公布日期
2009.07.30
申请号
WO2008GB00759
申请日期
2008.03.06
申请人
SMITHS DETECTION-WATFORD LIMITED;ATKINSON, JONATHAN, RICHARD