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GA/T 1918-2021 English PDF

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GA/T 1918-2021: Forensic sciences - Examination methods for nitrite ion - Chemical analysis and ion chromatography
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PDF similar to GA/T 1918-2021


Standard similar to GA/T 1918-2021

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Basic data

Standard ID GA/T 1918-2021 (GA/T1918-2021)
Description (Translated English) Forensic sciences - Examination methods for nitrite ion - Chemical analysis and ion chromatography
Sector / Industry Public Security (Police) Industry Standard (Recommended)
Classification of Chinese Standard A92
Word Count Estimation 10,139
Issuing agency(ies) Ministry of Public Security

GA/T 1918-2021: Forensic sciences - Examination methods for nitrite ion - Chemical analysis and ion 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 nitrite ion -- Chemical analysis and ion chromatography ICS 13.310 CCSA92 People's Republic of China Public Safety Industry Standards Forensic Science Nitrite Ion Test Chemical and Ion Chromatography Published on 2021-10-14 2022-05-01 Implementation Published by the Ministry of Public Security of the People's Republic of China

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by the National Criminal Technology Standardization Technical Committee Toxic Analysis Sub-Technical Committee (SAC/TC179/SC1). focal point. This document is drafted by. Criminal Technology Center of Guangdong Provincial Public Security Department, Physical Evidence Appraisal Center of Ministry of Public Security, Criminal Technology General Department of Heilongjiang Provincial Public Security Department Team, Wuhan Municipal Public Security Judicial Appraisal Center, Liaoning Provincial Public Security Department Criminal Technology Corps, Beijing Municipal Public Security Bureau Criminal Investigation Corps Eighth Team, Nanjing Public Security Bureau Bureau of Criminal Science and Technology Research Institute, People's Public Security University of China, Criminal Police Detachment of Qingdao Public Security Bureau. The main drafters of this document. Zhang Liang, Pei Maoqing, Shi Wenbing, Hu Haolang, Wang Bin, Xu Ruolun, Hou Xiaoping, Shao Bo, Li Juan, Wu Di, Wang Yanyan, Wang Yong, Jiang Hong, Guo Jie. Forensic Science Nitrite Ion Test Chemical and Ion Chromatography

1 Scope

This document specifies methods for the qualitative and quantitative analysis of nitrite ions in forensic science. This document is applicable to the qualitative analysis of nitrite ions in forensic in vitro samples and fresh samples such as vomitus, gastric lavage and gastric contents. analysis and quantitative analysis. Other test materials can be used for reference.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 6682 Analysis Laboratory Water Specifications and Test Methods GA/T 122 Toxic Analysis Terminology

3 Terms and Definitions

Terms and definitions defined in GA/T 122 apply to this document.

4 Principles

With blank sample and added sample as control, according to the requirements of parallel operation, extract and purify the test material, adopt chemical method and ion chromatography Statutory. The chemical method takes the color reaction as the qualitative judgment basis, and the ion chromatography uses the retention time as the qualitative judgment basis. in ionic color Based on the peak area. Quantification was performed using the external standard method.

5 Reagents and Materials

5.1 Reagents The water used for the test shall conform to the first-class water specified in GB/T 6682.Unless otherwise stated, the reagents used in the analysis were of analytical grade, The following reagents are included. a) Gries reagent. A solution, 0.5g p-aminobenzenesulfonic acid is dissolved in 150mL 30% acetic acid; B solution, 0.1g α-naphthylamine is dissolved in 20mL water, filtered, and the filtrate was mixed with 150 mL of 30% acetic acid. For immediate use, mix equal amounts of solution A and solution B to prepare Griess reagent. b) The standard solution is as follows. 1) Standard material stock solution. After conversion according to the purity and salt type of the sodium nitrite standard material, weigh an appropriate amount and prepare it with water. 1.0mg/mL nitrite ion standard substance stock solution, sealed and refrigerated, valid for 1 month. or use the city Standard solutions for sale.

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