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GA/T 1689-2020: Forensic sciences--Technical specifications for bloody fingerprint development by Acid Yellow 7
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Basic data | Standard ID | GA/T 1689-2020 (GA/T1689-2020) | | Description (Translated English) | Forensic sciences--Technical specifications for bloody fingerprint development by Acid Yellow 7 | | Sector / Industry | Public Security (Police) Industry Standard (Recommended) | | Classification of Chinese Standard | A92 | | Classification of International Standard | 13.310 | | Word Count Estimation | 6,627 | | Date of Issue | 2020-03-11 | | Date of Implementation | 2020-05-01 | | Issuing agency(ies) | Ministry of Public Security | GA/T 1689-2020: Forensic sciences--Technical specifications for bloody fingerprint development by Acid Yellow 7
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Forensic Science Technical Specification for Acid Yellow Revealing Occult Blood Fingerprint)
ICS 13.310
A92
Public Safety Industry Standards of the People's Republic of China
Forensic Science Acid Yellow 7 shows occult blood fingerprints
specifications
byAcidYelow7
2020-03-11 released
2020-05-01 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 certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents.
This standard was proposed by the Fingerprint Inspection Subcommittee of the National Criminal Technology Standardization Technical Committee (SAC/TC179/SC3) and
Focus.
Drafting organizations of this standard. People's Public Security University of China, Material Evidence Appraisal Center of Ministry of Public Security.
The main drafters of this standard. Zhao Yabin, Luo Yaping, Liu Huan, Qu Huiying, Xue Jing.
Forensic Science Acid Yellow 7 shows occult blood fingerprints
specifications
1 Scope
This standard specifies the principles, applicable objects, equipment, reagents, laboratory environment requirements,
Operation steps and precautions.
This standard applies to the display of occult blood fingerprints on non-permeable and partially semi-permeable objects.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GA/T 144 Forensic Science Fingerprint Terminology
GA/T 1239-2015 Technical specifications for forensic science ninhydrin display fingerprints
3 Terms and definitions
The following terms and definitions defined in GA/T 1239-2015 and GA/T 144 apply to this document.
3.1
Acid Yellow 7 AcidYelow7
The molecular formula is C19H13N2NaO5S, a reagent capable of fluorescent color reaction with proteins in the blood.
Note. The molecular weight is 404.37, non-toxic, soluble in water, and yellow powder.
4 Appearance principle
Acid yellow can be combined with protein molecules in the blood under weak acid conditions, and its reaction product is excited by a light source in the 440nm band
Produce yellow fluorescence, which makes the occult blood fingerprints appear.
5 Equipment, reagents, laboratory environment requirements
5.1 Equipment
440nm band light source, yellow filter.
5.2 Reagents
Distilled water, absolute ethanol, acetic acid, 5-sulfosalicylic acid, acid yellow-7.
5.3 Laboratory environment requirements
It is clean, well ventilated, and has dark room conditions.
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