GB/T 42906-2023 English PDF

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GB/T 42906-2023: Graphite materials - Test method for equivalent boron contents - Inductively coupled plasma atomic emission spectrometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42906-2023	189	Add to Cart	3 days	Graphite materials - Test method for equivalent boron contents - Inductively coupled plasma atomic emission spectrometry	Valid

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Basic data

Standard ID: GB/T 42906-2023 (GB/T42906-2023)
Description (Translated English): Graphite materials - Test method for equivalent boron contents - Inductively coupled plasma atomic emission spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q52
Classification of International Standard: 29.050
Word Count Estimation: 10,184
Date of Issue: 2023-08-06
Date of Implementation: 2024-03-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42906-2023: Graphite materials - Test method for equivalent boron contents - Inductively coupled plasma atomic emission spectrometry

---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.
ICS 29.050 CCSQ52 National Standards of People's Republic of China Determination of equivalent boron content of graphite materials Inductively coupled plasma atomic emission spectrometry Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by the China Iron and Steel Industry Association. This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This document was drafted by. Sinosteel New Materials Co., Ltd., Metallurgical Industry Information Standards Research Institute. The main drafters of this document. Yang Hui, Xu Jianping, Mao Yuzhen, Wang Xiaoyuan, Xu Hanchun, Zhang Shuang, Xu Runjiao, Ji Huanhuan. Determination of equivalent boron content of graphite materials Inductively coupled plasma atomic emission spectrometry

1 Scope

This document describes the use of an inductively coupled plasma atomic emission spectrometer (ICP spectrometer for short) to measure the equivalent boron content of graphite materials. Principles of quantity, instruments and equipment, reagents and materials, samples, test procedures, result calculations and test reports. This document applies to lithium, boron, sodium, silicon, potassium, calcium, titanium, vanadium, chromium, manganese, iron, Determination of equivalent boron content of 25 elements including cobalt, nickel, copper, strontium, molybdenum, silver, cadmium, barium, samarium, europium, gadolinium, dysprosium, thorium and uranium. other elements or other materials The measurement can be used as a reference.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 1427 Carbon material sampling method GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 8170 Numerical rounding rules and representation and determination of limit values GB/T 40408 Nuclear-grade isostatic graphite for internal components of high-temperature gas-cooled reactors JJG768 Calibration procedures for emission spectrometers

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 EBC The absorption of neutrons by a given impurity element in nuclear material, expressed in terms of the amount equivalent to boron. Note. The total equivalent boron content of the material is the sum of the equivalent boron content of each given impurity element, referred to as boron content. 3.2 μi The product of the relative atomic mass of boron and the thermal neutron absorption cross-section of a single impurity element is the product of the thermal neutron absorption cross-section of boron and the thermal neutron absorption cross-section of the impurity element. The ratio of the product of prime relative atomic masses. Note 1.Abbreviated as EBC factor. Please refer to Appendix A for EBC factors of various elements. Note 2.The EBC factor of a single impurity element is calculated according to formula (1). μi = MBσi MiσB (1) In the formula. MB --- relative atomic mass of boron element, dimensionless; ......

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