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GA/T 936-2011: Method for developing dust footprint by potassium ferricyanide of forensic
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Method for developing dust footprint by potassium ferricyanide of forensic
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GA/T 936-2011
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Basic data | Standard ID | GA/T 936-2011 (GA/T936-2011) | | Description (Translated English) | Method for developing dust footprint by potassium ferricyanide of forensic | | Sector / Industry | Public Security (Police) Industry Standard (Recommended) | | Classification of Chinese Standard | A92 | | Classification of International Standard | 13.310 | | Word Count Estimation | 4,444 | | Date of Issue | 2011-06-07 | | Date of Implementation | 2011-07-01 | | Quoted Standard | JB/T 9797-1999 | | Regulation (derived from) | Industry Standard Record Announcement No. 4 of 2012 (No. 148) | | Issuing agency(ies) | Ministry of Public Security | | Summary | This standard prescribes the basic methods of potassium iron cyanide enhanced plane dust traces and its applicable objects, principles, reagents, equipment, operating methods and requirements. This standard applies to all types of cases (things) on-site before the plane dust traces of the enhanced processing. | GA/T 936-2011: Method for developing dust footprint by potassium ferricyanide of forensic---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.
Method for developing dust footprint by potassium ferricyanide of forensic
ICS 13.310
A92
People 's Republic of China Public Security Industry Standard
Forensic science plane dust traces potassium ferricyanide enhancement method
2011-06-07 release
2011-07-01 implementation
Issued by the Ministry of Public Security of the People 's Republic of China
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
Please note that some of the contents of this document may involve patents. The release of this document
The Agency does not assume responsibility for identifying these patents.
This standard is proposed by the National Committee for the Standardization of Trademarks (SAC/TC179/SC9)
Go back.
The drafting unit of this standard. Department of Criminal Science and Technology, Chinese People 's Police University.
The main drafters of this standard. Luo Yaping, Guo Wei, Wang Danhua.
Forensic science plane dust traces potassium ferricyanide enhancement method
1 Scope
This standard specifies the basic methods of potassium carbide (potassium ferricyanide, K3 [Fe (CN) 6]) to enhance the surface dust traces and
Its applicable objects, principles, reagents, equipment, methods of operation and requirements.
This standard applies to all types of cases (things) on-site plane dust traces before the extraction of enhanced processing.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
JB/T 9797-1999 Sprayer spray parts
3 Applicable object
Paper, natural wood, non-woven fabrics, light-colored dense textiles and other penetrating surface of the surface of the dust traces, and light-colored tiles and other non-permeability
The surface of the surface of the plane dust traces.
4 principle
Hydrochloric acid reacts with iron in the dust to form ferrous chloride. Ferrous chloride reacts with potassium ferricyanide to form a precipitate of "Teng's Blue"
Color and enhance the dust footprint, the reaction is as follows.
FeO 2HCl = FeCl2 H2O
3FeCl2 2K3 [Fe (CN) 6] = Fe3 [Fe (CN) 6] 2 ↓ 6KCl
5 reagents and equipment
5.1 Reagent
The following reagents are chemically pure.
a) concentrated hydrochloric acid;
b) Ethanol;
c) potassium ferricyanide;
d) deionized water;
e) Dust fixative, refers to a special kind of dust fixative or styling hair gel and other resin-based polymer alcohol solution as the main component of the liquid.
5.2 equipment
sprayer. Sprayer spray components should be acid and alkali, the technical requirements see JB/T 9797-1999.
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