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GA/T 1655-2019: Forensic sciences--Examination methods for soil elements--X-ray fluorescence spectrometry
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Forensic sciences--Examination methods for soil elements--X-ray fluorescence spectrometry
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GA/T 1655-2019
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Basic data | Standard ID | GA/T 1655-2019 (GA/T1655-2019) | | Description (Translated English) | Forensic sciences--Examination methods for soil elements--X-ray fluorescence spectrometry | | Sector / Industry | Public Security (Police) Industry Standard (Recommended) | | Classification of Chinese Standard | A92 | | Classification of International Standard | 13.310 | | Word Count Estimation | 6,613 | | Date of Issue | 2019 | | Date of Implementation | 2019-12-01 | | Issuing agency(ies) | Ministry of Public Security | GA/T 1655-2019: Forensic sciences--Examination methods for soil elements--X-ray fluorescence spectrometry
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Forensic sciences--Examination methods for soil elements--X-ray fluorescence spectrometry
ICS 13.310
A92
Public Safety Industry Standards of the People's Republic of China
Forensic soil elemental composition test
X-ray fluorescence spectroscopy
Published on October 14,.2019
2019-12-01 Implementation
Issued by the Ministry of Public Security of the People's Republic of China
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Please note that some content of this document may involve patents. The issuer of this document does not assume responsibility for identifying these patents.
This standard was proposed by the National Criminal Technology Standardization Technical Committee Physical and Chemical Inspection Sub-Technical Committee (SAC/TC179/SC4) and
Be in charge.
This standard was drafted by. Material Evidence Appraisal Center of the Ministry of Public Security, Material Evidence Appraisal Center of Shanghai Public Security Bureau.
The main drafters of this standard. Guo Hongling, Ding Minju, Wang Ping, Quan Yangke.
Forensic soil elemental composition test
X-ray fluorescence spectroscopy
1 Scope
This standard specifies the method of inspection and analysis of soil physical evidence by X-ray fluorescence spectroscopy in the field of forensic science.
This standard is applicable to the comparison test of the elemental composition contained in the soil physical evidence in the field of forensic science. It can also be used by reference in other fields.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GA/T 242 Terms of physical and chemical testing for forensic science
3 Terms and definitions
The terms and definitions defined in GA/T 242 apply to this document.
4 Principle
When the sample is irradiated with strong X-rays, the atoms of each component element are excited to produce secondary characteristic X-rays, namely
X-ray fluorescence. Different elements have characteristic X-ray lines of different wavelengths, and the intensity of each line is in a certain degree with the concentration of the element
Relationship, the wavelength and intensity of the characteristic X-ray spectrum of the element to be measured can be analyzed qualitatively and quantitatively.
Mud is a mixture of minerals, organic matter and living organisms as well as moisture, air, etc., with minerals as the main component. Different soil
The elemental composition and content of minerals are different. The X-ray fluorescence spectrometer can be used to analyze the elements in the soil sample, thereby
Achieve inspection and comparison of soil element composition.
5 Reagents and materials
Boric acid (analytical purity).
6 Instruments and equipment
The required instruments and equipment are as follows.
a) X-ray fluorescence spectrometer;
b) grinding machine;
c) Tablet press (with tablet mold), pressure range 20MPa~30MPa;
d) oven;
e) Balance, accuracy 0.1mg.
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