MODE OF DETECTION OF TRACE QUANTITIES OF LOW-VOLATILE SUBSTANCES ON THE FINGERS OF THE ARMS Russian patent published in 2008 - IPC G01N1/22 G01N33/22 G01N25/14 

FIELD: the invention refers to the field of gas analysis and may be used for decision for tasks of detection of trace quantities of low-volatile (for example, explosive, narcotic) substances on the fingers of the arms of a man liable to control for example on an examining post, on portals or on tourniquets.

SUBSTANCE: the mode is in pressing with the finger of the arm on the contact surface, in heating the contact surface, in selection of air sample closely to the contact surface and in analysis of the air sample. At that before or in time of pressing with the finger of the arm on the contact surface they measure the temperature of the contact surface or calculate it on the basis of the measured values of the environmental air, of the time of heating of the contact surface or calculate it on the basis of measured values of the temperature of the environmental air, of the time of heating and of cooling in the previous cycle of inspection. At that the switching on of the heater of the contact surface is executed on a time interval whose duration depends from the temperature of the contact surface, at that the contact surface is an element of a pressing button control mechanism providing starting of heating of the contact surface.

EFFECT: simplification of the procedure of inspection of the fingers of the arms, acceleration of inspection, automation of the process and increase of sensitiveness of detection.

2 cl, 3 fig