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A noble metal sol spray for in-situ detection of explosives by surface-enhanced Raman spectroscopy and its preparation method and application

A surface-enhanced Raman and precious metal sol technology is applied in the field of explosive detection and analysis to achieve the effects of improving detection efficiency, simplifying extraction and detection time, and saving costs

Active Publication Date: 2019-02-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, surface-enhanced Raman spectroscopy cannot be used for in-situ detection of hard-to-volatilize inorganic explosive molecules on solid surfaces such as envelopes.

Method used

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  • A noble metal sol spray for in-situ detection of explosives by surface-enhanced Raman spectroscopy and its preparation method and application
  • A noble metal sol spray for in-situ detection of explosives by surface-enhanced Raman spectroscopy and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0042]The noble metal sol spray applied to surface-enhanced Raman spectroscopy for in-situ detection of explosives is a modified sol spray formed by modifying the surface of noble metal sol particles and then dispersing them in an organic solvent. The preparation method steps are as follows:

[0043] (1) Preparation of modified precious metal sol: Add 5ml of copper reagent aqueous solution with a concentration of 0.1mmol / L dropwise into 100ml of precious metal sol with a concentration of 1mmol / L and stir. The precious metal sol is silver sol, and the stirring time is 15min to obtain modified silver Nanosol.

[0044] (2) After centrifuging the modified silver nano-sol obtained in step (1) at 5000 rpm for 10 minutes, the concentrated solution at the bottom was dispersed in the same volume of ethanol to obtain final product.

[0045] Application of noble metal sol spray for in-situ detection of explosives by surface-enhanced Raman spectroscopy:

[0046] (1) Preparation of test s...

Embodiment 2

[0053] The preparation method of the noble metal sol spray applied to the in-situ detection of surface-enhanced Raman spectroscopy described in Example 1, the difference is:

[0054] The noble metal sol is gold sol, which is prepared according to the existing method.

[0055] Example 2:

[0056] The preparation method of the noble metal sol spray applied to the in-situ detection of surface-enhanced Raman spectroscopy described in Example 1,

[0057] The difference is:

[0058] The modifier is 3-mercapto-1-propylamine aqueous solution with a concentration of 0.1mmol / L.

Embodiment 3

[0060] The preparation method of the noble metal sol spray applied to the in-situ detection of surface-enhanced Raman spectroscopy described in Example 1, the difference is:

[0061] The modifier is 2-dimethylaminoethanethiol hydrochloride aqueous solution with a concentration of 0.05mmol / L.

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Abstract

The invention relates to a noble metal sol spray for in-situ detection of explosives through a surface enhancing raman spectrum as well as a preparation method and an application thereof. The noble metal sol spray is a modified sol spray which is formed by modifying the colloidal particle surface of the noble metal sol and then dispersing into the organic solvent. The noble metal sol spray provided by the invention can be used for quickly, sensitively and accurately realizing the in-situ detection for the inorganic explosives and nitro organic explosives on the solid surface.

Description

technical field [0001] The invention relates to a noble metal sol spray applied to in-situ detection of explosives by surface-enhanced Raman spectroscopy, a preparation method and application thereof, and belongs to the technical field of detection and analysis of explosives. Background technique [0002] Since the 1990s, all kinds of terrorist incidents have spread rapidly around the world, and the trend is severe. Security issues have attracted more and more attention. The rapid detection of suspicious explosives is particularly important to prevent the occurrence of dangerous events. Common explosives are mainly divided into two categories: organic explosives and inorganic explosives. Compared with common strong organic explosives such as TNT, inorganic explosives are often used by dangerous elements due to their low cost, easy access, and common inorganic explosives include black powder with nitrate as the main component and perchloric acid Explosives in which salt is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 占金华陈娟史玉娥
Owner SHANDONG UNIV
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