Method for detecting specificity of trinitrotoluene

A trinitrotoluene and detection method technology, applied in the direction of fluorescence/phosphorescence, analysis through chemical reaction of materials, material excitation analysis, etc., can solve the problems of unfavorable trinitrotoluene, complicated pretreatment, time-consuming, etc. Achieve high sensitivity, simple sample processing, and specific detection effects

Inactive Publication Date: 2010-09-22
HUNAN UNIV
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These methods are time-consuming, expensive, and sample pretreatment is complicat

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  • Method for detecting specificity of trinitrotoluene
  • Method for detecting specificity of trinitrotoluene
  • Method for detecting specificity of trinitrotoluene

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[0016] The present invention will be further described below in conjunction with the examples, rather than limiting the present invention.

[0017] Using the method of the present invention, the inventor can detect trinitrotoluene in a certain soil in Hunan University simply, quickly and specifically.

[0018] 1. Add 150mL of 67.8mg of cysteine ​​(l-cysteine) containing 96.5mg of Cd(AC) under the condition of nitrogen protection 2 in ultrapure water; use 0.5M NaOH to adjust the pH value of the solution to 11.0; add 223.5mg sodium citrate and 17.9mgNa 2 TeO 3 ; Under the condition of blowing nitrogen, add 16.5mg NaBH 4 ; Finally, 25mL of the above solution was transferred to an autoclave, and reacted at 160°C for different times to obtain CdTe quantum dots with different particle sizes.

[0019] 2. Extraction of trinitrotoluene from soil: 2 g of soil from Hunan University was mixed with 3 mL of acetonitrile under ultrasonic conditions for 2 hours; the precipitate was filtere...

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Abstract

The invention provides a method for detecting the specificity of trinitrotoluene. The method comprises the following steps of: under a nitrogen protection condition, adding 67.8mg of cysteine into 150mL of ultra pure water containing 96.5mg of Cd(AC)2; adjusting a pH value of the solution to be 11.0 by using 0.5M NaOH; adding 223.5mg of sodium citrate and 17.9mg of Na2TeO3 respectively into the solution; under a condition of introducing nitrogen, adding 16.5mg of NaBH4; finally, transferring 25mL of the solution to a high-pressure reaction kettle to perform reaction at the temperature of 160 DEG C so as to obtain the solution of CdTe quantum dots with different grain sizes; and adding a condensed detection sample into the solution of CdTe quantum dots and reacting for 2 hours, and detecting the sample by using a spectrofluorometer. The method has the advantages of high sensitivity and specificity, short detection time, easy sample treatment and good application prospect.

Description

technical field [0001] The invention relates to a simple, rapid and specific new method for detecting p-trinitrotoluene based on the principle of quantum dot fluorescence quenching. Background technique [0002] Trinitrotoluene is a high explosive widely used in factories and mines. Trinitrotoluene is a highly hazardous poison that can enter the human body through inhalation, ingestion, and percutaneous absorption, causing serious damage to the human body including toxic liver damage, toxic cataract, anemia, dermatitis, and eczema. Therefore, realizing the simple, rapid and specific detection of p-TNT is of great significance for monitoring the pollution degree of TNT in the environment and studying its biological toxicity mechanism. At present, high performance liquid chromatography, gas chromatography, enzyme-linked immunoassay and other methods are mainly used to detect trinitrotoluene. These methods are time-consuming, expensive, and sample pretreatment is complicated,...

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Application Information

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IPC IPC(8): G01N21/64G01N21/75
Inventor 罗胜联陈章刘玉堂陈玉芳何晔娟刘承斌蔡青云
Owner HUNAN UNIV
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