GB/T 10267.1-2025 English PDF

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GB/T 10267.1-2025: Methods for analysis of calcium metal - Part 1: Determination of chlorine by chloride selective electorode method
Status: Valid

GB/T 10267.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 10267.1-2025	219	Add to Cart	3 days	Methods for analysis of calcium metal - Part 1: Determination of chlorine by chloride selective electorode method	Valid
GB/T 10267.1-1988	139	Add to Cart	2 days	Method for analysis of calcium metal. The determination of chlorine content by chloride. Selective electrode

Basic data

Standard ID: GB/T 10267.1-2025 (GB/T10267.1-2025)
Description (Translated English): Methods for analysis of calcium metal - Part 1: Determination of chlorine by chloride selective electorode method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H12
Classification of International Standard: 77.120
Word Count Estimation: 10,168
Date of Issue: 2025-08-01
Date of Implementation: 2026-02-01
Older Standard (superseded by this standard): GB/T 10267.1-1988
Issuing agency(ies): State Administration for Market Regulation, Standardization Administration of China

GB/T 10267.1-2025: Methods for analysis of calcium metal - Part 1: Determination of chlorine by chloride selective electorode method

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT10267.1-2025
ICS 77.120 CCSH12 National Standard of the People's Republic of China Replaces GB/T 10267.1-1988 Metal Calcium Analysis Method Part 1.Determination of chloride by chloride ion selective electrode method Released on August 1, 2025 Implementation on February 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 1 5 Reagents or materials 1 6 Instruments and Equipment 2 7 Sample 2 8 Test Step 2 9 Experimental data processing 3 10 Precision 3 11 Quality Assurance and Control 3 12 Test Report 3 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is Part 1 of GB/T 10267 “Analysis of Metallic Calcium”. GB/T 10267 has been published in the following parts. --- Part 1.Determination of chlorine by chloride ion selective electrode method; --- Part 2.Photometric determination of trace silicon; --- Part 3.Direct determination of iron, nickel, copper, manganese and magnesium by atomic absorption spectrophotometry; --- Part 4.Spectrophotometric determination of aluminum using 8-hydroxyquinoline-chloroform extraction; --- Part 5.Determination of nitrogen using the distillation-Nessler reagent photometric method. This document replaces GB/T 10267.1-1988 "Analysis of metallic calcium - Determination of chlorine by the chloride ion selective electrode method" and is incompatible with GB/T 10267.1- Compared with 1988, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The determination range of chlorine in "Scope" has been changed (see Chapter 1, Chapter 1 of the 1988 edition); b) The pH range in the “Principle” was changed (see Chapter 4, Chapter 2 of the 1988 edition); c) The requirements for laboratory water in "Reagents or Materials" have been changed (see Chapter 5, Chapter 3 of the 1988 edition); d) Added the relevant content on the use of standard substances/standard samples in “chlorine standard stock solution” (see 5.13); e) Added the requirements for sample status in "Sample" (see 7.1); f) The description of the relevant content in "Precision" has been changed (see Chapter 10, Chapter 7 of the 1988 edition); g) Added the description of “quality assurance and control” (see Chapter 11); h) Added the description of the relevant content of "test report" (see Chapter 12). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Technical Committee for Nuclear Energy Standardization (SAC/TC58). This document was drafted by. China National Nuclear Corporation Northern Nuclear Fuel Element Co., Ltd., Sichuan Honghua Industrial Co., Ltd., China National Nuclear Corporation 404 Co., Ltd., Hanzhong Zinc Industry Special Materials Co., Ltd. The main drafters of this document are. Li Qingchao, Yang Yongming, Liu Yibo, Li Jiajia, Zhang Ruijuan, Liu Xinchun, Liu Yi, Zhao Shenglu, Yang Lichun, Ji Qiuyu, Shen Yanan, Jia Lingyu, Wang Yumin, Wang Weijie, Long Gaoxu, and Cao Peng. The previous versions of this document and the documents it replaces are as follows. ---First published in 1988 as GB/T 10267.1-1988; ---This is the first revision.

introduction

This document is an important standard in the field of metal calcium detection in my country. Since its release in 1988, it has provided a reference for the determination of chlorine content in metal calcium. It has a scientific basis and is widely used in the nuclear industry, metallurgy and new materials research and development. GB/T 10267 "Analysis of Metallic Calcium" aims to provide the analysis method of the chemical composition of metallic calcium and is intended to consist of 5 parts. --- Part 1.Determination of chlorine using a chloride ion selective electrode. The purpose is to establish a method for the determination of chlorine content in metallic calcium. --- Part 2.Photometric determination of trace silicon. The purpose is to establish a method for the determination of silicon content in metallic calcium. --- Part 3.Direct determination of iron, nickel, copper, manganese and magnesium by atomic absorption spectrophotometry. The purpose is to establish the direct determination of iron, nickel, copper, manganese and magnesium in metallic calcium. Direct determination method of manganese and magnesium content. --- Part 4.8-Hydroxyquinoline-chloroform extraction spectrophotometric determination of aluminum. The purpose is to establish the determination of aluminum content in metallic calcium. Determine the method. --- Part 5.Determination of nitrogen by distillation-Nessler reagent photometric method. The purpose is to establish a method for the determination of nitrogen content in metallic calcium. With the advancement of analytical technology and the improvement of detection accuracy requirements, the original standards need to be further optimized in terms of method applicability and operating specifications. The application of metallic calcium in high-end fields such as nuclear reactor cladding materials and high-strength alloys places more stringent requirements on the control of chlorine content. The lower limit of measurement needs to be extended, the chlorine standard stock solution should be increased by directly purchasing the certified national standard solution, and the water and sample status in the standard should be standardized. The ion selective electrode analysis method for determining chlorine content is simple to operate and reflects the latest level of industry development. The analysis method meets various The detection method of metallic calcium products produced by the process is scientific and reliable. Metal Calcium Analysis Method Part 1.Determination of chloride by chloride ion selective electrode method

1 Scope

This document describes the analytical method for the determination of chloride in metallic calcium using a chloride ion selective electrode. This document is applicable to the determination of chlorine in metallic calcium. Determination range. 100μg/g~5000μg/g. Impurity tolerance. Cr, Fe, Al, Ni, Mn and Si are both 1 mg, Cu 4 mg, Mg 6 mg.

2 Normative references

This document has no normative references.

3 Terms and Definitions

There are no terms or definitions that require definition in this document. 4 Principles The sample was dissolved in water and nitric acid and converted into nitrate. Sodium nitrate solution was used as ionic strength agent at pH 4-8. The chloride ion selective electrode determines the chloride content in the sample.

5 Reagents or materials

Unless otherwise specified, the reagents used in the analysis are all high-grade pure reagents that meet national standards, and the water used for analysis is to meet the conductivity of ≤0.10mS/m (25 ℃) deionized water. 5.1 Nitric acid. ρ = 1.42 g/mL. 5.2 Sodium hydroxide. 5.3 Sodium nitrate. analytical grade. 5.4 Calcium carbonate. spectrally pure. 5.5 Sodium chloride. spectrally pure. Burn at 500°C~600°C for 40min~50min before use. 5.6 Anhydrous ethanol. analytical grade. 5.7 Nitric acid solution. φ(HNO3) = 50%, prepared from nitric acid (5.1) and water. 5.8 Nitric acid solution. φ(HNO3) = 5%, prepared from nitric acid (5.1) and water. 5.9 Sodium nitrate solution. c(NaNO3) = 5 mol/L. Weigh 212.5 g of sodium nitrate (5.3), dissolve it in water, and dilute to 500 mL with water. 5.10 Sodium hydroxide solution. ρ(NaOH) =.200 g/L, prepared by mixing sodium hydroxide (5.2) with water. 5.11 Sodium hydroxide solution. ρ(NaOH) = 50 g/L, prepared by mixing sodium hydroxide (5.2) with water. 5.12 Matrix calcium solution. ρ(Ca) = 0.1 g/mL. Weigh 125g of calcium carbonate (5.4) into a 300mL plastic cup, moisten it with water, and slowly add nitric acid solution 1 (5.7) until it is completely dissolved. Cool, transfer to a 500 mL volumetric flask, dilute to the mark with water, and mix well. ......

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