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GA/T 1314-2016 English PDF

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GA/T 1314-2016: Specifications for examination of composition of paper fibers in forensics
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PDF similar to GA/T 1314-2016


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Basic data

Standard ID GA/T 1314-2016 (GA/T1314-2016)
Description (Translated English) Specifications for examination of composition of paper fibers in forensics
Sector / Industry Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard A92
Classification of International Standard 13.310
Word Count Estimation 7,711
Date of Issue 2016-06-27
Date of Implementation 2016-06-27
Issuing agency(ies) Ministry of Public Security
Summary This standard specifies the inspection rules for the composition of paper fibers in the field of court science. This standard applies to the inspection of paper fibers in the field of court science.

GA/T 1314-2016: Specifications for examination of composition of paper fibers in forensics

---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.
Specifications for examination of composition of paper fibers in forensics ICS 13.310 A92 People 's Republic of China Public Security Industry Standard Code of inspection of fiber composition of forensic paper 2016-06-27 released 2016-06-27 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. This standard is proposed by the National Committee for Standardization of Criminal Technical Standards (SAC/TC179/SC10). This standard by the National Criminal Technology Standardization Technical Committee. The drafting of the standard units. the Beijing Municipal Public Security Bureau, the Ministry of Public Security evidence center. The main drafters of this standard. Zhang Jianzhou, Wang Xin, Han Xing Zhou. Code of inspection of fiber composition of forensic paper

1 Scope

This standard specifies the inspection rules for the composition of paper fibers in the field of court science. This standard applies to the inspection of paper fibers in the field of court science.

2 terms and definitions

The following terms and definitions apply to this document. 2.1 Weight factor The ratio of the thickness of the fiber to the thickness of the standard fiber.

3 equipment

The following instruments are recommended for reference. a) Biological microscope. magnification of 80-300 times; b) Dispenser; c) Slide. 76.2mm × 25.4mm specification; d) coverslips. specifications for the 20mm × 20mm; e) dropper. minimum scale 0.5mL; f) Drop bottle. 30 mL or 50 mL. Preparation of 4 Herzberg Staining Agents 4.1 Saturated zinc chloride solution at room temperature Zinc chloride (ZnCl2) was added to 100 mL of warm water until the solute was no longer dissolved. Until it is cooled to room temperature, to be zinc chloride (ZnCl2) crystallization, stored in a brown reagent bottle in reserve. 4.2 iodine solution 2.1 g of potassium iodide (KI) and 0.1 g of iodine (I2) were mixed, and 5 mL of water was added dropwise with a pipette, and the mixture was stirred by adding water while stirring. If iodide (I2) residues are not dissolved, the solution should be discarded and reconstituted. 4.3 Herzberg stains The solution of 15mL zinc chloride (ZnCl2), 1mL water and iodine (I2) solution was mixed for 6h or more. After all the precipitates were precipitated, The supernatant was poured into a brown drop and a small piece of iodine (I2) was added. Herzberg stains should be kept in dark places when not in use and should be re-formulated every two months. Before using the new dye, apply the known fiber to be checked. The concentration of the coloring agent is judged based on the color of the known fiber. Such as If the concentration of the coloring agent is low, a small amount of zinc chloride (ZnCl2) crystal chip should be added

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