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Novel finger print developing reagent and developing method thereof

A fingerprint and reagent technology, applied in measuring devices, material analysis through optical means, instruments, etc., can solve the problems of high DFO price and environmental pollution, and achieve the effect of mature synthesis technology, high sensitivity and high yield

Inactive Publication Date: 2010-05-19
湖北景深安全技术有限公司
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AI Technical Summary

Problems solved by technology

But the price of DFO is high, and the organic solvent trichlorotrifluoroethane used pollutes the environment

Method used

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  • Novel finger print developing reagent and developing method thereof
  • Novel finger print developing reagent and developing method thereof
  • Novel finger print developing reagent and developing method thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] The present invention uses p-2,3,7-trihydroxy-9-(4'-nitro)phenylfluorescein, namely p-nitrophenylfluorescein (p-NO 2 -PF) as a fingerprint developer, its structural formula is:

[0024]

[0025] The preparation method of the present invention is as follows:

[0026] Triglycerol triacetate was synthesized from p-phenol by a classical method, and then condensed with p-benzaldehyde in a sulfuric acid medium, and then hydrolyzed to obtain p-NO 2 -PF, its synthesis steps are as follows:

[0027] Add the acetic acid aqueous solution of chromium trioxide dropwise to the acetic acid aqueous solution of p-phenol and react at 15 ° C to obtain p-benzoquinone; then add p-benzoquinone in batches to acetic anhydride (sulfuric acid is an acidic medium) and react at below 50 ° C. Obtain trimemol triacetate; add p-nitrobenzaldehyde in batches to the ethanol solution of trimemol triacetate (using sulfuric acid as the acidic medium) to react at 75°C, and finally hydrolyze the solid o...

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Abstract

A new kind of fingerprint presentation reagent and the method of presentation which belongs to the detection technology area of trace quantity organic. The invention makes the paranitroaniline phenylfluorone ethanol liquor as the fingerprint reagent and it is easy to compose and to get the material and the composition technology is mature and the production efficiency is high and there is little poison minus effect for the user and the reaction is quick and it can get the fingerprint convenience, quickly, and clearly.

Description

technical field [0001] The invention relates to a novel fingerprint developing reagent, a preparation method thereof, and a method for developing fingerprints by using the reagent, belonging to the technical field of detection of trace organic substances. Background technique [0002] Fingerprints have the characteristics of different people, lifelong immutability and touch marks. The scientific and correct discovery, extraction, and identification of fingerprints have an important practical role in carrying out investigation work and punishing crimes; fingerprint identification is one of the most reliable methods for personal identification, and is used in forensic science to verify, expose and prove crimes; In the investigation and handling of accidents, when the victims or deceased of some accidents or natural disasters cannot be identified with the naked eye due to injury or other reasons, extracting their fingerprints can often provide accurate identification; The fing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/00
Inventor 黄应平罗光富叶国生杜枝喜涂朝辉朱圣姬姜利荣
Owner 湖北景深安全技术有限公司
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