GA/T 2008-2022 in English

VALID

Forensic sciences—Specifications for examination of gun

Issued on:2022-10-07
Implemented on:2023-01-01
File Format:PDF
Delivery:Via email within 1~3 business days

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Standard No:	GA/T 2008-2022
Document status:	VALID
Title in English:	Forensic sciences—Specifications for examination of gun
Title in Chinese:	法庭科学枪支检验技术规范
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2022-10-07
Implemented on:	2023-01-01
Professional Classification:	GA-Security
Related Keywords:	gun introduction analysis added muzzle energy ratio test requirements muzzle energy ratio test requirements trace evidence extraction implementation suggestions typical case application gun body
Related Topics:	science Inspection technology gun Laboratory streamline scientific test laboratory medicine scientific testing techniques ga/t753.1-2008 ga/t753.2-2008 firearms Tech support 30 pieces of science and technology support Small laboratory forensic science Technology support forensic science scientific version Department of Technology and Science Provincial inspection departments Inspection technology court gun vapor inspection technique Japan science and technology ga/t 753.1-2008 Tech support ga/t754-2008 Technology branch GA/T798-2008 Technology Court Applied Technical Requirements Forensic Science Firearm Parts Inspection Technology Laboratory Biochemistry Instrument Methodology international forensic science ga/t813-2008

Introduction

Analysis of standard framework

As a public security industry standard (GA/T), this specification is formulated in accordance with GB/T 1.1-2020 Standardization Work Guidelines, with the following main specifications:

Core elements	Technical requirements	Related standards
Inspection objects	Gun body, Ballistic traces, firing residues	GA/T 1506-2018
Key equipment	Comparison microscope, speed meter, spectrometer	GB/T 29352
Identification conditions	Trace feature matching degree ≥ 90%	GB/T 23865

Technology evolution analysis

Compared with the old version of the standard, the main upgrades are reflected in:

Added Muzzle energy ratio test requirements (referenced GA/T 953)
Refine the digital comparison process of bullet rifling traces
Clarify the pollution prevention and control measures for trace evidence extraction

Implementation suggestions

Typical case application

In a gun-related case in 2021, the muzzle energy ratio test requirements were added (referenced GA/T 953)

Refine the digital comparison process of bullet rifling traces

Clarify the pollution prevention and control measures for trace evidence extraction

Implementation suggestions

Typical case application

In a gun-related case in 2021, the muzzle energy ratio test requirements were added (referenced GA/T 953)

class=instrument>stereo microscope was used to observe the firing pin marks, and combined with the energy spectrum analysis of the propellant residue, a chain of evidence linking the gun and the cartridge case involved in the case was successfully established.

Operational points

Sample pretreatment must be carried out in a cleanliness level 100 laboratory environment
Ballistic reconstruction should record at least 3 sets of comparison samples
The inspection report must include quantitative data on trace characteristics

More samples: JJG 21-2008 GB 18306-2015 DL/T 5154-2012

Sample only — not a preview of GA/T 2008-2022