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Rapid developing agent for biological traces

A technology of developing agent and trace, applied in chemical/physical process, chemical/physical/physical-chemical process, chemical/physical/physical-chemical stationary reactor, etc., can solve the problem of low definition and resolution, DNA inspection damage, It takes a long time for development to achieve the effect of simple and convenient operation, fast development time and clear development effect.

Active Publication Date: 2018-06-22
刘红兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes a long time to develop, and the clarity and resolution are low. In addition, some methods are destructive to DNA, causing irreversible damage to later DNA testing, leading to invalidation of some important evidence, and bringing a lot of inconvenience to our criminal investigation work.
Due to the diversity of latent fingerprint objects (material types and background colors) and legacy timeliness, the traditional method of displaying latent fingerprints has been unable to meet the needs of our modern criminal investigation technology.

Method used

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  • Rapid developing agent for biological traces
  • Rapid developing agent for biological traces
  • Rapid developing agent for biological traces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A biological trace rapid visualization agent is composed of the following raw materials: fluorescent substance 1kg, ninhydrin 4kg, lanthanum oxide 0.2kg, silver nitrate 3kg, polyether F68 0.1kg, ethanol 90kg; the pH of the biological trace rapid visualization agent is 4.5; the fluorescent substance is eosin Y.

[0050] The above-mentioned biological trace rapid visualization agent is prepared according to the following steps:

[0051] ① Add 1 kg of fluorescent substance to 45 kg of ethanol and stir until it is completely dissolved, then add 4 kg of ninhydrin to it until it is completely dissolved to obtain the first solution; the fluorescent substance is Eosin Y;

[0052] ② Add 3kg of silver nitrate and 0.2kg of lanthanum oxide into 45kg of ethanol, heat and stir until completely dissolved, and control the heating temperature within 65°C to obtain the second solution;

[0053] ③Mix the first solution obtained in step ① with the second solution obtained in step ② to obt...

Embodiment 2

[0055] A biological trace rapid visualization agent, consisting of the following raw materials: fluorescent substance 2kg, ninhydrin 8kg, lanthanum oxide 1kg, silver nitrate 10kg, polyether F68 0.4kg, ethanol 110kg; the pH of the biological trace rapid visualization agent is 6.5 ; The fluorescent substance is fluorescein.

[0056] The above-mentioned biological trace rapid visualization agent is prepared according to the following steps:

[0057] ①Add 2kg of fluorescent substance into 55kg of ethanol and stir until completely dissolved, then add 8kg of ninhydrin until completely dissolved to obtain the first solution; the fluorescent substance is fluorescein;

[0058] ② Add 10kg of silver nitrate and 1kg of lanthanum oxide into 55kg of ethanol, heat and stir until completely dissolved, and control the heating temperature within 65°C to obtain the second solution;

[0059] ③Mix the first solution obtained in step ① with the second solution obtained in step ② to obtain a mixed ...

Embodiment 3

[0061] A biological trace rapid visualization agent, consisting of the following raw materials: fluorescent substance 1.5kg, ninhydrin 7kg, lanthanum oxide 0.6kg, silver nitrate 8kg, polyether F68 0.2kg, ethanol 105kg; the pH of the biological trace rapid visualization agent is 5.5; the fluorescent substance is calcein.

[0062] The above-mentioned biological trace rapid visualization agent is prepared according to the following steps:

[0063] ①Add 1.5kg of fluorescent substance to 52.5kg of ethanol and stir until completely dissolved, then add 7kg of ninhydrin to it until completely dissolved to obtain the first solution; the fluorescent substance is calcein;

[0064] ② Add 8kg of silver nitrate and 0.6kg of lanthanum oxide into 52.5kg of ethanol, heat and stir until completely dissolved, and control the heating temperature within 65°C to obtain the second solution;

[0065]③Mix the first solution obtained in step ① with the second solution obtained in step ② to obtain a mi...

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Abstract

The invention discloses a rapid developing agent for biological traces and a preparation method of the rapid developing agent. The rapid developing agent is composed of the following raw materials: afluorescent substance, ninhydrin, lanthanum oxide, silver nitrate, polyether F68 and ethanol; pH of the rapid developing agent for biological traces is 4.5-6.5; the fluorescent substance is eosin Y, fluorescein or calcein. The rapid developing agent for biological traces provided by the invention can fast develop a fingerprint, can naturally develop the fingerprint within 30 seconds without a developing box or a developing instrument, is simple and convenient to operate during use, is packaged in a spray tank, and is used for spraying a detection object; the developed fingerprint is visible tonaked eyes without using other expensive optical instruments, such as laser or multi-band light source; the rapid developing agent for biological traces provided by the invention is used widely, notonly can develop human fingerprints, but also has a rapid developing function for body fluids secreted by a human body such as saliva, blood, urine, semen stains and female secretions.

Description

technical field [0001] The invention relates to the technical field of trace detection, in particular to a rapid biological trace visualization agent. Background technique [0002] Compared with other fields of forensic science, fingerprint technology has developed slowly in recent years. DNA technology and poison detection technology have developed by leaps and bounds in recent years, but fingerprint visualization technology still stays on the basis of traditional physical methods, chemical methods and optical visualization methods. , commonly used in traditional physical methods are powder visualization method and iodine fumigation visualization method. The physical method is to use the adsorption of sweat latent fingerprints on powder materials to reveal fingerprint lines. The traditional chemical methods mainly include ninhydrin visualization method, DFO visualization method, "502" fumigation method, tetramethylbenzidine visualization method, etc. . This type of method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64B01J19/18B01J4/00B01F15/02B01F13/10
CPCB01J4/001B01J19/1862G01N21/6428G01N2021/6432B01F33/811B01F35/712B01F35/71
Inventor 刘红兵黄磊孙庆东刘莉王卫华伊鹏郭科建王冰
Owner 刘红兵
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