Collecting device for corpse-derived odorant and detection and visual analysis method of corpse-derived odorant

An analysis method and collection device technology, applied in the field of forensic entomology, can solve the problems of complex corpses, lack of convenient collection, storage and analysis methods, destruction, etc., and achieve the effect of simple collection device, reduced detection cost, and short collection time

Pending Publication Date: 2022-06-03
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing collection methods of corpse-derived odor substances are complicated to operate, and there is a certain amount of destruction and sampling of corpses. The analysis of corpse-derived odor substances has not been actually applied to criminal investigation, and there is a lack of convenient collection and storage of industry standards. and analysis methods

Method used

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  • Collecting device for corpse-derived odorant and detection and visual analysis method of corpse-derived odorant
  • Collecting device for corpse-derived odorant and detection and visual analysis method of corpse-derived odorant
  • Collecting device for corpse-derived odorant and detection and visual analysis method of corpse-derived odorant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

1 Collection and preservation of corpse volatiles

1.1 Pretreatment of experimental materials

Experimental materials include:

Adsorption tube: Tenax Ta tube (6*150mm) was activated before use, treated with nitrogen blower at 300°C and constant helium flow (200ml / min) for 0.5 hours, then wrapped the port with parafilm and wrapped with tin foil Store at 4-8℃;

Beijing Labor Insurance Institute air sampler × 1; multi-section Teflon hose; body bag × 1; n-hexane; 2ml brown chromatography bottle; micropipette × 1; parafilm; tin foil.

[0026] 1.2 Installation and precautions

Insert the adsorption tube with one end of the Teflon hose into the body bag containing the corpse 10cm, make sure that the adsorption tube does not touch the corpse or the body bag. Place the air sampler in an upright position.

[0027] 1.3 Volatile adsorption

Three groups of odors were repeatedly collected from the same corpse, and the three groups were collected and mixed. At the same time, accordin...

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Abstract

The invention provides a corpse-derived odor substance collecting device, which comprises an adsorption tube, an atmosphere sampler, a Teflon hose and a corpse wrapping bag, one end of the adsorption tube is connected with the corpse wrapping bag, the other end of the adsorption tube is connected with one end of the Teflon hose, and the other end of the Teflon hose is connected with the atmosphere sampler; the invention further provides a corpse-derived odor substance detection method and an analysis, storage and visualization method, and invisible odor is converted into visual data for forensic analysis. The method has the advantages of no destructive collection, simple operation, no requirement for professional background of operators, convenient storage, good collection effect and great reduction of the detection cost.

Description

technical field [0001] The invention relates to the technical field of forensic entomology, in particular to an early collection device and detection method of corpse-derived odor substances, and a later analysis, preservation and visualization method. Background technique [0002] Forensic entomology (Forensic entomology) is a branch of forensic science that applies entomological knowledge to solve relevant legal issues. The inference of death time, especially the inference of postmortem interval (PMI) of decomposed corpses, has unique advantages. After the body dies, in the process of putrefaction, the soft tissues of the body are decomposed with the assistance of microorganisms such as bacteria, fungi and protozoa, resulting in the phenomenon of autolysis, which continuously produces and releases a large number of chemical odor molecules. These chemical odor molecules released by the corpse are Known as cadaveric volatiles (Anderson et al. 2001; Chen Lushi 2005; Statherop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/88
CPCG01N30/06G01N30/88G01N2030/8813
Inventor 郭亚东任立品陈珊尚艳杰张祥彦
Owner CENT SOUTH UNIV
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