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