GA/T 1242-2015 English PDF

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GA/T 1242-2015: Technical specifications for latent fingerprint development by silver nitrate in forensic science
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GA/T 1242-2015	149	Add to Cart	2 days	Technical specifications for latent fingerprint development by silver nitrate in forensic science	Valid

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Basic data

Standard ID: GA/T 1242-2015 (GA/T1242-2015)
Description (Translated English): Technical specifications for latent fingerprint development by silver nitrate in forensic science
Sector / Industry: Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard: A92
Classification of International Standard: 13.310
Word Count Estimation: 5,551
Date of Issue: 2015-02-11
Date of Implementation: 2015-02-11
Quoted Standard: GA/T 144-1996
Regulation (derived from): Notice on Publication of Public Safety Industry Standard (Year 2015); Industry Standard Record Announcement No. 2016 (No. 197)
Issuing agency(ies): Ministry of Public Security
Summary: This standard specifies the principles, equipment, reagents, laboratory environmental requirements, operating procedures and precautions for the display of silver nitrate. This standard applies to the development of potential fingerprints on light-colored permeable objects.

GA/T 1242-2015: Technical specifications for latent fingerprint development by silver nitrate in forensic science

---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.
Technical specifications for latent fingerprint development by silver nitrate in forensic science ICS 13.310 A92 People's Republic of China Public Security Industry Standards Visualizing Fingerprints Forensic Science silver nitrate technical specifications forensicscience Issued on. 2015-02-11 2015-02-11 implementation People's Republic of China Ministry of Public Security

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. Please note that some of the content of this document may involve patents. Distribution of this document Institutions do not assume the responsibility to identify these patents. This standard by the National Standardization Technical Committee on Forensic Science and Technology fingerprint examination Standardization Technical Committee (SAC/TC179/SC3) mention And the focal point. This standard was drafted. Chinese People's Public Security University, Ministry of Public Security Evidence Identification Center. The main drafters of this standard. Shi Haiqing, Zhen dry, often Parker. Visualizing Fingerprints Forensic Science silver nitrate technical specifications

1 Scope

This standard specifies the method of silver nitrate show fingerprints principle, equipment, reagents, laboratory environmental requirements, procedures and precautions. This standard applies to latent fingerprints appear on the light permeability object.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GA/T 144-1996 fingerprint professional terminology

3 Terms and Definitions

Terms and definitions GA/T 144-1996 define apply to this document. Principle 4 show After silver nitrate and sodium chloride in sweat to produce a chemical reaction, generate ultraviolet rays or sunlight under silver chloride and sodium nitrate, silver chloride Decomposed into silver particles and chlorine, with the increase of silver particles, showing brown hand stamped line. 5 equipment, reagents and laboratory environmental requirements 5.1 Device Fume hood, UV lights. 5.2 Reagents Silver nitrate, ethanol and distilled water. 5.3 Environmental Laboratory Health clean, well-ventilated, with darkroom conditions.

6 steps and precautions

6.1 Procedure 6.1.1 solution preparation (Formulations) Formula 1. Weigh 1g ~ 3g silver nitrate, plus a small amount of water dissolved by adding 100mL of anhydrous ethanol. Formulation 2. Weigh 1g ~ 3g silver nitrate, dissolved in 100mL of distilled water. ......

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