METHOD FOR DETERMINING REMOTENESS OF A SHOT AND DEVICE FOR REALIZATION OF METHOD Russian patent published in 2006 - IPC G01N33/00 G01N33/22 

FIELD: technical expertise of firearms, possible use in forensic evaluations and investigations, and also during field operations.

SUBSTANCE: method for determining remoteness of shot from a firearm includes taking samples of diphenylamine from internal surface of barrel of firearm being examined, absorption of diphenylamine by sorbent, following desorption of diphenylamine and measurement of its amount in samples, on basis of which remoteness of shot is determined. Prior to taking samples barrel of firearm is heated, two samples of diphenylamine are taken by suction. Second sample is taken after experimental shot from current firearm, performed directly after taking first sample in the moment of firearm receipt. Then ratio of amount of diphenylamine in second sample to its amount in first sample is calculated, and remoteness of shot is determined as a result of comparison of received ratio to analogical ratio for firearm with known shot remoteness value. Device for taking samples when determining firearm shot remoteness contains heating element, positioned on the barrel of weapon, aspirator, concentration shell, having a layer of sorbent inside, and an adapter for hermetic connection of barrel channel outlet to concentration shell, output of which is connected to aspirator.

EFFECT: increased precision when determining remoteness of a shot.

2 cl, 6 dwg