INTRODUCTION OF TESTS IN AN IONAL MOBILITY Spectrometer

摘要

PCT No. PCT/GB92/01388 Sec. 371 Date Jan. 24, 1994 Sec. 102(e) Date Jan. 24, 1994 PCT Filed Jul. 27, 1992 PCT Pub. No. WO93/03360 PCT Pub. Date Feb. 18, 1993In the type of ion mobility spectrometer having a unidirectional drift and source flow (30) which is exhausted (22) downstream of an ionisation source (10), improved sensitivity is obtained by entraining the effluent (18) from a gas chromatograph within a faster moving further gas flow (32), both being introduced in a direction counter to that of the said unidirectional flow.