GB/T 23514-2020 English PDF

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GB/T 23514-2020: Methods for chemical analysis of nuclear-grade Ag-In-Cd alloys
Status: Valid

GB/T 23514: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23514-2020	209	Add to Cart	3 days	Methods for chemical analysis of nuclear-grade Ag-In-Cd alloys	Valid
GB/T 23514-2009	239	Add to Cart	3 days	Chemical analysis methods for nuclear-grade Ag-In-Cd alloys	Obsolete

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Basic data

Standard ID: GB/T 23514-2020 (GB/T23514-2020)
Description (Translated English): Methods for chemical analysis of nuclear-grade Ag-In-Cd alloys
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H15
Classification of International Standard: 77.120.99
Word Count Estimation: 11,129
Date of Issue: 2020-11-19
Date of Implementation: 2021-10-01
Older Standard (superseded by this standard): GB/T 23514-2009
Regulation (derived from): National Standard Announcement No. 26 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the determination of the main components of silver, indium, cadmium and impurity elements magnesium, bismuth, copper, iron, manganese, nickel, lead, tin, and zinc in nuclear-grade silver-indium-cadmium (AgInCd80-15-5) alloys method. This standard applies to nuclear grade silver-indium-cadmium (AgInCd80-15-5) alloys with the main elements silver, indium, cadmium content and impurity elements magnesium, bismuth, copper, iron, manganese, nickel, lead, tin, and zinc content. Measurement, measurement range: 0.000 5% ~ 0.010%.

GB/T 23514-2020: Methods for chemical analysis of nuclear-grade Ag-In-Cd alloys

---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.
Methods for chemical analysis of nuclear-grade Ag-In-Cd alloys ICS 77.120.99 H15 National Standards of People's Republic of China Replace GB/T 23514-2009 Nuclear grade silver-indium-cadmium alloy chemical analysis method 2020-11-19 released 2021-10-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 23514-2009 "Nuclear grade silver-indium-cadmium alloy chemical analysis method". Compared with GB/T 23514-2009, the main technical changes of this standard are as follows. ---Modified the English abbreviation EDTA of disodium ethylenediaminetetraacetic acid to Na2EDTA (see Chapter 2,.2009 edition full text); ---Modified the number of calibrations for the concentration of sodium chloride and Na2EDTA standard titration solutions (see 2.2.14, 3.13 in the.2009 edition); ---Modified the content of the equipment part (see 2.3, Chapter 4 of the.2009 edition); ---Added the description of the pH meter in the silver titration section (see 2.5.3.3, 6.2.3 of the.2009 edition); --- Change the allowable error to precision (see 2.7, 8.2 in the.2009 edition); ---Inductively coupled plasma mass spectrometry has been added (see Chapter 3). This standard was proposed by China Nonferrous Metals Industry Association. This standard is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). Drafting organizations of this standard. Xi'an Hantang Analysis and Testing Co., Ltd., Guangdong Industrial Analysis and Testing Center, Ningxia Dongfang Tantalum Co., Ltd. Company, Baotai Group Co., Ltd., National Standard (Beijing) Inspection and Certification Co., Ltd. The main drafters of this standard. Liu Houyong, Wang Xiaojing, Wang Xinkai, Xu Jieyu, Zhang Junfeng, Liu Ting, Wang Changhua, Wang Jin, Hou Chuan, Xiong Xiaoyan, Mo Shumin, Zhang Linna. The previous versions of the standard replaced by this standard are. ---GB/T 23514-2009. Nuclear grade silver-indium-cadmium alloy chemical analysis method

1 Scope

This standard specifies the main components of the nuclear-grade silver-indium-cadmium (AgInCd80-15-5) alloy, silver, indium, cadmium and impurity elements magnesium, bismuth, copper, iron, manganese, nickel, Method for determination of lead, tin and zinc content. This standard applies to the main elements of silver, indium, cadmium and impurity elements magnesium, bismuth, copper, iron, Determination of manganese, nickel, lead, tin, zinc content, measurement range. 0.0005% ~ 0.010%. 2 Determination of silver, indium and cadmium content titration method 2.1 Principle The sample is dissolved with nitric acid. First use the potentiometric titration method to determine the silver content, use a composite silver electrode, and titrate to the potential with a sodium chloride standard solution End point; adjust the pH of the solution to 2.5, use PAN as an indicator, and titrate the indium with Na2EDTA standard solution; adjust the pH of the solution to 6.0, Continue to titrate cadmium with Na2EDTA standard solution. 2.2 Reagents Unless otherwise specified, only reagents and laboratory secondary water confirmed to be analytically pure are used in the analysis. 2.2.1 Electrolytic silver (wAg≥99.99%). 2.2.2 Metal indium (wIn≥99.99%). 2.2.3 Metal cadmium (wCd≥99.99%). 2.2.4 Ammonia (ρ0.90g/mL). 2.2.5 Glacial acetic acid (ρ1.049g/mL). 2.2.6 Nitric acid (ρ1.42g/mL). 2.2.7 Nitric acid (1 1). 2.2.8 Sodium hydroxide solution (200g/L). 2.2.9 Acetic acid-sodium acetate solution. Weigh 20g sodium acetate and dissolve in water, add 46.2mL glacial acetic acid (2.2.5), and dilute with water to 500mL, mix well. 2.2.10 PAN indicator. Weigh 0.1g PAN indicator dissolved in 100mL methanol, and mix. 2.2.11 Sodium chloride standard titration solution (c≈0.050mol/L). Weigh 2.92g sodium chloride (pre-burned at 560°C for 4h, then put it in a desiccator Cool to room temperature) in a 500mL beaker, add 300mL water to dissolve, transfer to a 1000mL volumetric flask, dilute with water to the mark, and mix. 2.2.12 Disodium ethylenediaminetetraacetic acid (Na2EDTA) standard titration solution (c≈0.010mol/L). Weigh 3.72g Na2EDTA and place In a 500mL beaker, add 300mL of water to dissolve, transfer to a 1000mL volumetric flask, dilute to the mark with water, and mix. 2.2.13 Silver indium cadmium (AgInCd80-15-5) standard mixed solution. accurately weigh the metal that has been cleaned with organic reagents and dried in a desiccator Electrolytic silver (2.2.1) 8.0000g, metallic indium (2.2.2) 1.5000g and metallic cadmium (2.2.3) 0.5000g, put them together in a 150mL beaker, Add 50mL nitric acid (2.2.7), heat at low temperature to dissolve the sample completely, remove the nitrogen oxides, and transfer it into a 100mL brown volumetric flask. Dilute to the mark with water and mix well. 2.2.14 Calibration of the concentration of sodium chloride and Na2EDTA standard titration solution. pipette 10.00mL silver indium cadmium standard mixed solution (2.2.13) Place in a 100mL volumetric flask, dilute to the mark with water, and mix well. Pipette 4 parts of the above solution each 10.00mL into four 100mL In a beaker, dilute with water to about 40mL. The following shall be carried out according to 2.5.3.3~2.5.3.5. ......

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