GA/T 1657-2019 English PDF

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GA/T 1657-2019: Forensic sciences--Examination methods for ball pen ink traces--Liquid chromatography
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GA/T 1657-2019	139	Add to Cart	3 days	Forensic sciences--Examination methods for ball pen ink traces--Liquid chromatography	Valid

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Basic data

Standard ID: GA/T 1657-2019 (GA/T1657-2019)
Description (Translated English): Forensic sciences--Examination methods for ball pen ink traces--Liquid chromatography
Sector / Industry: Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard: A92
Classification of International Standard: 13.310
Word Count Estimation: 6,642
Date of Issue: 2019
Date of Implementation: 2019-12-01
Issuing agency(ies): Ministry of Public Security

GA/T 1657-2019: Forensic sciences--Examination methods for ball pen ink traces--Liquid chromatography

---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 sciences--Examination methods for ball pen ink traces--Liquid chromatography ICS 13.310 A92 Public Safety Industry Standards of the People's Republic of China Forensic Science Ballpoint Pen Handwriting Color Mark Inspection Liquid chromatography 2019-10-14 released 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 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 National Criminal Technology Standardization Technical Committee Physical and Chemical Inspection Subcommittee (SAC/TC179/SC4) and Focus. Drafting organizations of this standard. China Criminal Police Academy, Material Evidence Identification Center of the Ministry of Public Security. Drafters of this standard. Shi Xiaofan, Wang Yan, Zhang Zhenyu, Mei Hongcheng. Forensic Science Ballpoint Pen Handwriting Color Mark Inspection Liquid chromatography

1 Scope

This standard specifies the liquid chromatography inspection method for the color marks of ballpoint pens in the field of forensic science. This standard is applicable to the comparative inspection of dye components in the color marks of blue and black ballpoint pens in the field of forensic science.

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 242 The terminology of physical and chemical examination of trace evidence in forensic science

3 Terms and definitions

The terms and definitions defined in GA/T 242 apply to this document.

4 Principle

The colored components in ballpoint pen inks are composed of different dyes and pigments, which are commonly used in blue and black ballpoint pen inks. Crystal Violet, Basic Violet 5BN, Basic Brilliant Blue B, etc. The dyes used in ballpoint pen inks produced by different brands and different manufacturers are different. Intermediate products and by-products are also different. These differences can lead to differences in the number of chromatographic peaks, retention times, and peak height ratios in their chromatograms. because Therefore, the types of color marks of ballpoint pens can be compared based on the analysis results of dye components in the color marks of ballpoint pens. test.

5 Reagents and materials

The required reagents and materials are as follows. a) Methanol (chromatographically pure); b) Deionized water; c) Pinhole sampler (inner diameter not greater than 0.5mm); d) Micro syringe (5μL or 10μL); e) Test tube (0.5mL).

6 Apparatus and equipment

High performance liquid chromatograph with UV-visible detector. ......

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