Method used for perform combustion improver kind similarity judgment using Pearson product-moment correlation coefficient (PPMC)

A technology of product-moment correlation and correlation coefficient, which is applied in the field of judging the similarity of combustion accelerant types by using the Pearson product-moment correlation coefficient method, can solve problems such as fire investigation interference, and achieve the effect of fast, efficient, accurate, and concise qualitative and quantitative methods

Inactive Publication Date: 2018-02-09
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

And someone has conducted a series of experiments, the results show that the pyrolysis products produced may interfere with the fire investigation to a certain extent (see literature [6]Almirall JR, FurtonKG.2004.Characterization of background and pyrolysis products that may interfere with the forensic Analysis of fire debris [J]. Journal of Analytical and Applied Pyrolysis. 71(1):51-67.)

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  • Method used for perform combustion improver kind similarity judgment using Pearson product-moment correlation coefficient (PPMC)
  • Method used for perform combustion improver kind similarity judgment using Pearson product-moment correlation coefficient (PPMC)
  • Method used for perform combustion improver kind similarity judgment using Pearson product-moment correlation coefficient (PPMC)

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0023] figure 1 It is the interface diagram of the similarity analysis software for combustion aids. Now use this method to detect unknown samples, and use similarity software to quantitatively describe the similarity of the combustion products of the two combustion aids, which can be used to analyze and identify the similarity between the unknown sample and the standard combustion aid. The specific operation process is as follows:

[0024] 1. Sample processing method

[0025] A certain amount of sample is placed in a metal tank and heated by a propane torch at the bottom to burn and decompose the sample. After the experiment, the sample was cooled and collected into a glass sample bottle, sealed intact, and waiting for testing.

[0026] Solid phase microextraction (SPME), extraction head model: PDMS (Supelco);

[0027] Extraction temperature: 100°C, extraction ti...

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Abstract

The invention discloses a method used for perform combustion improver kind similarity judgment using Pearson product-moment correlation coefficient (PPMC). The method is used for avoiding influences of the uncertainty and the randomness of artificial identification of chromatograms, and influences of combustible matters, and combustion or decomposition products of combustion improvers on spectrums, and providing reliable technical support for material evidence identification process of complex fire fields. According to the method, practical fire field environment is taken into consideration asfar as possible, gas chromatography-mass spectrometry (GC-MS) technology is adopted for detection of samples and samples containing combustion improvers; influences of combustible matters and combustion improver pyrolysis products on identification is taken into consideration; a combustion improver similarity analysis software is adopted for rapid identification. The method is rapid, is accurate,and is high in efficiency, is a simplified qualitative-and-quantitative method of similarity analysis of combustion improvers, and scientific reference execution standards and basis are provided forfire hazard investigation personnel.

Description

Technical field [0001] The invention belongs to the technical field of identification of combustion-supporting agents in fire investigations in fire science, and specifically relates to a method for judging the similarity of combustion-supporting agents by using the Pearson Product Moment Correlation Coefficient (PPMC) method. Background technique [0002] At present, the types of fires in society are developing in the direction of major and unconventional, and the occasional arson cases have greatly affected the stability of society. After a fire accident occurs, only by correctly identifying the cause of the fire can the person responsible for the fire accident be correctly determined, reasonable compensation for the casualties, and guiding opinions on the corresponding manufacturing process, building structure, fire protection facilities, etc. The determination of the cause of fire is of great significance for detecting arson cases and maintaining social harmony. [0003] Arson...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/025
Inventor 宗若雯高佳鑫胡杨慧
Owner UNIV OF SCI & TECH OF CHINA
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