MASS-SENSITIVE SELECTIVE CONCENTRATOR FOR ION MOBILITY SPECTROSCOPY (IMS) Russian patent published in 2010 - IPC G01N30/00 H01J49/40 

FIELD: instrument making.

SUBSTANCE: invention relates to analytical instruments, particularly, to devices intended for preliminary concentration of analyzed sample and combined with analytical instrument that can be used to produce fast-operation analyzers of poisonous or explosive substance concentration in air. Proposed concentrator comprises analyzed sample fast-desorption absorbing element and acoustic transducer with its output signal depending upon mass of absorbed sample. Acoustic transducer represents a piezoelectric plate-sound conductor with two built-in interdigital electromechanical transducers (IDT), designed to excite and receive surface acoustic waves (SAW). While absorbing element represents a film made from molecular imprinting polymer applied onto said plate-sound receiver surface and consisting of two sections, i.e. small-area detecting section located on SAW propagation line, and larger-area concentrating section located outside acoustic line. Said concentrating section can comprise two additional sections to double as SAW-absorbing coatings. To this end, said additional sections are arranged on plate-sound receiver surface, on SAW propagation line outside the space between IDT.

EFFECT: higher sensitivity and selectivity of ion mobility spectroscopy.

2 cl, 2 dwg