Reaction system for strengthening shoe print trace and display method thereof

A reaction system and shoe print technology, applied in biological testing, material inspection products, etc., can solve the problems that blood diving shoe prints cannot be displayed well, difficult to control, and overreacted. cost saving effect

Inactive Publication Date: 2011-04-13
INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the reagent has a high sensitivity to blood sneaker prints, tetramethylbenzidine (TMB) has a good effect on blood sneak fingerprints on permeable objects, especially the blood sneak fingerprints on natural wood, but for Blood fingerprints on non-permeable objects, due to the sensitive reaction, a small amount of reagents can quickly react with blood stains, and it is easy to overreact, shoe prints spread, and it is difficult to control during operation
Through experiments and investigations, it was found that the tetramethylbenzidine reagent could not show the blood diving shoe prints on the blue object well because of the inability to form a clear contrast.

Method used

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  • Reaction system for strengthening shoe print trace and display method thereof
  • Reaction system for strengthening shoe print trace and display method thereof
  • Reaction system for strengthening shoe print trace and display method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A reaction system for enhancing shoe prints, the reaction system contains a dyeing solution and a washing solution; the dyeing solution is an ethanol solution of Hungarian Red, and the washing solution is absolute ethanol;

[0069] The raw material of the staining liquid contains: Hungarian red, water, absolute ethanol; the weight-to-volume ratio (w / v / v) of the Hungarian red, water, and absolute ethanol is 0.5-5:5-50: 300~1200.

[0070] Described water is deionized water, also can be pure water;

[0071] The parameters of the dehydrated ethanol are: content >99.7%, acidity ≤0.04mmol / g; the Hungarian red, water, and dehydrated ethanol are all purchased from Sinopharm Group;

[0072] Described Hungarian Red is soluble in water, and the preparation method of described staining liquid is:

[0073] According to the above ratio, after the Hungarian Red is completely dissolved in the water, the Hungarian Red aqueous solution is obtained; then the absolute ethanol is slowly p...

Embodiment 2

[0101] This embodiment is a preferred solution based on Embodiment 1.

[0102] A reaction system for enhancing shoe prints, the reaction system contains a dyeing solution and a washing solution; the dyeing solution is an ethanol solution of Hungarian Red, and the washing solution is absolute ethanol;

[0103] The raw material of the staining solution contains: Hungarian Red, deionized water, and absolute ethanol; the weight-to-volume ratio (w / v / v) of the Hungarian Red, deionized water, and absolute ethanol is 4:40: 1000.

[0104] The dosages of Hungarian red, deionized water and absolute ethanol are respectively 0.8g: 8ml: 200ml; the dosage of the washing solution is 200ml.

[0105] The preparation method of described dyeing solution is referring to embodiment 1;

[0106] 1. The following test is to detect the effect of the reaction system and display method on the display effect of blood diving shoe prints:

[0107] 1. Selection of host object

[0108] In order to test th...

Embodiment 3

[0136] This embodiment is a preferred solution based on Embodiment 1.

[0137] A reaction system for enhancing shoe prints, the reaction system contains a dyeing solution and a washing solution; the dyeing solution is an ethanol solution of Hungarian Red, and the washing solution is absolute ethanol;

[0138] The raw material of the staining solution contains: Hungarian Red, deionized water, and absolute ethanol; the weight-to-volume ratio (w / v / v) of the Hungarian Red, deionized water, and absolute ethanol is 0.5:40: 900.

[0139] The unit of weight in this embodiment is gram, which may also be kilogram; the unit of volume is milliliter, which may also be liter.

[0140]

[0141] The preparation method of described dyeing solution is referring to embodiment 1;

[0142] For the presentation method of this embodiment, please refer to Embodiment 1;

[0143] The following test is to detect the effect of the reaction system and the visualization method on the visualization effe...

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Abstract

The invention provides a reaction system for strengthening a shoe print trace and a display method thereof. The reaction system contains staining liquid and flushing liquid; the staining liquid is a Hungarian red ethanol solution; and the flushing liquid is anhydrous ethanol. The display method sequentially comprises the steps of staining and flushing. The reaction system and the display method thereof have obvious effect on strengthening the shoe print trace, are safe and nontoxic for a human body, are convenient for use and can be suitable for the complex and fickle field.

Description

technical field [0001] The invention belongs to the field of on-site inspection of criminal cases and forensic science trace inspection, and specifically relates to a reaction system for enhancing shoe print traces and a display method thereof. The reaction system contains a dyeing solution and a washing solution; the dyeing solution is Ethanol solution of Hungarian Red, and the washing solution is absolute ethanol. [0002] Background technique [0003] Shoe prints are one of the important pieces of evidence left by the suspect at the scene. Shoe print inspection can play an extremely important role in investigation and trial: analyze the nature of the case, provide clues for investigation, narrow the scope of investigation, and provide evidence for trial. Especially in homicide and violent crime scenes, blood shoe prints are one of the most important physical evidence at the crime scene, which can provide important clues and strong evidence for case investigation. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/50
Inventor 白艳平葛大勇张金班茂森
Owner INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
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