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A surface-enhanced Raman detection device for public security fire scene

A surface-enhanced Raman and device technology, used in Raman scattering, material excitation analysis, etc., can solve the problems of rapid detection of physical evidence that cannot be effectively guaranteed, complicated operation, long analysis time, etc., to facilitate the preservation and follow-up of physical evidence. Analysis, simple structure, easy to carry effect

Active Publication Date: 2016-09-07
SHANGHAI FIRE RES INST OF THE MIN OF PUBLIC SECURITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when chromatography technology is applied in the field, it needs complex preparation steps such as sample extraction, separation, and enrichment, as well as external carrier gas or solvent as mobile phase. In addition, the analytical instrument itself is large in volume, complicated in operation, and long in analysis time. Field work will have a very detrimental effect
In short, due to the lack of systematic research and effective detection and analysis methods, the on-site rapid detection of physical evidence and its timeliness cannot be effectively guaranteed.

Method used

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  • A surface-enhanced Raman detection device for public security fire scene
  • A surface-enhanced Raman detection device for public security fire scene
  • A surface-enhanced Raman detection device for public security fire scene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: as figure 1 As shown, the device includes a device cylinder 1, a filter head 2, a filter sieve plate 3, a sample guide chamber 4, a detection base 5, a holder 6 and its fixing buckles 6a and 6b, a drainage tube 7, a positioner 8, Rubber pad 9, air guide pin 10, air guide hole 11, piston 12, spring holder 13, connecting rod 14, spring 15, extrusion sleeve 16. Among them: the filter head 2 is set at the front end of the device cylinder 1; a filter sieve 3 is provided at a distance of 1~2cm; the filter sieve 3 is connected to the sample diversion cavity 4, and the sample diversion cavity 4 is provided with a detection base 5. A drainage tube 7 is provided at the rear end; a fixer 6 for connecting the optical fiber probe is provided above the detection base 5, and the fixer 6 is provided with a light-transmitting window and has an opening / sealing function; the diversion of the sample diversion chamber 4 The rear end of the tube 7 is provided with a locator 8 ...

Embodiment 2

[0045] Using the device described in Example 1, the detection substrate used is a surface-enhanced Raman active substrate whose glass surface is modified with a gold nanoparticle layer. Its preparation method is:

[0046] (1) SiO 2 Activation and Preparation of Glass Matrix

[0047] Cut the glass slides into small pieces of about 0.5×0.5cm, soak them in the mixed solution of concentrated sulfuric acid and hydrogen peroxide for 12 hours, take them out and wash them with deionized water and ethanol respectively, dry them and soak them in 3-aminopropyl-trimethoxysilane ( APTMS) in ethanol solution for 12h, take out and rinse with ethanol to remove excess APTMS, dry in an oven before use.

[0048] (2) Preparation of gold nanoparticle colloids

[0049] Dilute 4.8mL of 1% tetrachloroauric acid aqueous solution into 100mL of deionized water, boil until slightly boiling, add 10mL of 1% sodium citrate aqueous solution under magnetic stirring, keep boiling for a certain period of tim...

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PUM

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Abstract

The invention relates to a surface-enhanced Raman detection device for public security fire-fighting fire scenes, including a device cylinder, a filter head, a filter sieve plate, a sample diversion chamber, a detection base, a fixer, a positioner, a rubber pad, a piston, Spring retainer, linkage and extruded bushing. The filter head is located at the front end of the device cylinder; a filter sieve plate is set at a certain distance from it; the sieve plate is connected to the sample diversion chamber, and a detection base is provided on the diversion chamber, and a drainage tube is provided at the rear end; There is a fixer, and a locator is provided at the rear end of the drainage tube, which has the function of detachable and fixing the sealing rubber pad; a piston is set at a certain distance behind the rubber pad, and the two sides of the piston are respectively connected with the air guide needle and the connecting rod with air guide holes Connection, the connecting rod is connected with the extrusion sleeve; the inner wall of the detection device at the rear end of the piston is provided with a spring holder, and the two ends of the spring are respectively connected with the spring holder and the inner wall of the extrusion sleeve. The invention has the advantages of simple structure, low cost, easy portability, fast detection, easy operation and the like.

Description

technical field [0001] The invention belongs to the technical field of Raman spectrum on-site detection, in particular to a surface-enhanced Raman spectrum detection device used in public security fire-fighting and fire scenes. Background technique [0002] The occurrence of fire has caused a serious impact on people's production and life and social harmony and stability. The identification of physical evidence at the fire scene is an important part of the fire cause investigation, which can provide key technical support for finding out the cause of the fire. The law of fire occurrence through the analysis of the fire cause can also help prevent and reduce the recurrence of similar accidents. [0003] Organic compounds widely exist in people's production and life. Knowing the chemical composition, content composition, molecular characteristics, spatial distribution, existence mode, and change characteristics of such combustion residues in the fire scene is very important for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
Inventor 顾海昕张永丰龙亿涛李大伟曹丽英黄昊包任烈
Owner SHANGHAI FIRE RES INST OF THE MIN OF PUBLIC SECURITY