GB/T 40374-2021 English PDF

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GB/T 40374-2021: Hardmetals - Determination of lead and cadmium content - Flame atomic absorption spectrometric method and inductively coupled plasma atomic emission spectrometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40374-2021	184	Add to Cart	3 days	Hardmetals - Determination of lead and cadmium content - Flame atomic absorption spectrometric method and inductively coupled plasma atomic emission spectrometry	Valid

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Basic data

Standard ID: GB/T 40374-2021 (GB/T40374-2021)
Description (Translated English): Hardmetals - Determination of lead and cadmium content - Flame atomic absorption spectrometric method and inductively coupled plasma atomic emission spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H63
Word Count Estimation: 10,177
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40374-2021: Hardmetals - Determination of lead and cadmium content - Flame atomic absorption spectrometric method and 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.
Hardmetals - Determination of lead and cadmium content - Flame atomic absorption spectrometric method and inductively coupled plasma atomic emission spectrometry ICS 77.160 CCSH63 National Standards of People's Republic of China Cemented carbide chemical analysis methods lead and cadmium content Determination of flame atomic absorption spectrometry and inductance Coupled plasma atomic emission spectrometry (ISO 26482.2010, Hardmetals-Determinationofleadandcadmiumcontent, IDT) Released on 2021-08-20 and implemented on 2022-03-01 State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

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" Drafting. This document is equivalent to ISO 26482.2010 "Determination of Lead and Cadmium in Cemented Carbides". A chapter "Terms and Definitions" has been added to this document. This document has made the following minimal editorial changes. ---In order to be consistent with the existing standard series, the standard name is revised to "Cemented Carbide Chemical Analysis Method for the Determination of Lead and Cadmium Flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry. Please note that some of the contents of this document may involve patents, and the issuing agency of this document is not responsible for identifying patents. This document was proposed by China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Non-ferrous Metals Standardization Technical Committee (SAC/TC243). Drafting organizations of this document. Zhuzhou Cemented Carbide Group Co., Ltd., National Standard (Beijing) Inspection and Certification Co., Ltd., Guangdong Academy of Sciences Industry Analysis and Testing Center, Changsha Research Institute of Mining and Metallurgy Co., Ltd. The main drafters of this document. Zhang Ying, Peng Yu, Liang Hong, Liu Tiemei, Li Tian, Chen Xiongfei, Chen Xiaodong, Xu Siting, Yang Binghong, Zhang Zhiyong. Cemented carbide chemical analysis methods lead and cadmium content Determination of flame atomic absorption spectrometry and inductance Coupled plasma atomic emission spectrometry

1 Scope

This document specifies the flame atomic absorption spectrometry and inductively coupled plasma emission spectrometry to determine the amount of lead in cemented carbide and The amount of cadmium. This document applies to cemented carbides with lead and cadmium content between 0.0001% (mass fraction) and 0.1% (mass fraction).

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. ISO 385 Laboratory glassware-Burettes Note. GB/T 12805-2011 Laboratory glass burette (ISO 385.2005, NEQ) ISO 648 Laboratory glassware-Single-volumepipettes ISO 1042 Laboratory glassware-One-mark volumetric flask flasks) Note. GB/T 12806-2011 laboratory glassware single mark volumetric flask (ISO 1042.1998, NEQ)

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Principle

Place the sample in a platinum dish or a polytetrafluoroethylene (PTFE) beaker, decompose the sample with hydrofluoric acid and nitric acid, and dissolve it with sodium hydroxide solution Tungstic acid precipitation. Use potassium cyanide to mask residual cobalt, extract and separate lead and cadmium with dithizone, dilute, and use flame atomic absorption spectrometry (AAS) and electricity Inductively coupled plasma atomic emission spectrometry (ICP-AES) for measurement.

5 Reagents

Unless otherwise stated, only use reagents and distilled water or equivalent purity water confirmed to be analytically pure in the analysis. 5.1 Perchloric acid. ρ=1.67g/mL. 5.2 Nitric acid (HNO3). ρ=1.40g/mL, 69%~71%, diluted with water to prepare (11). 5.3 Hydrofluoric acid. 40% (mass fraction), ρ=1.14g/mL or 50% (mass fraction), ρ=1.17g/mL. 5.4 Ammonium citrate solution. 250g/L. 5.5 Sodium hydroxide solution. 250g/L. ......

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