Putting in place interval mutually, the ionic mobility spectrometer which has the plural electrodes which are provided

摘要

The ionic mobility spectrometer has opened to the ionization territory 3 in order to form the ion of the suffering analysis substance, it has the inlet 2 for the suffering analysis substance. Mutually parallel grid electrode 41 - 43, crossing the ion passage, extending has been present in cross direction, strength of the aforementioned electric field, fluctuates maximum strength of police box electric field and the aforementioned electric field of relatively small strength, generates the differential ionic mobility effect gives change possible electric field to the ion with asymmetric police box electric field of big strength over plural periods. Electricity extremely 5 collects the ion which is passed, low electric field period and passes between high electric field period both parties and index of character of the suffering analysis substance is formed by the ion which is collected. In addition, impressing abbreviation police box electric field between the electrodes is disclosed, this electric field low changes with value and high price over the time when it exceeds police box period.