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GB/T 39138.3-2020: Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 3: Determination of chromium, iron, silicon and boron contents - Inductively coupled plasma atomic emission spectrometry
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Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 3: Determination of chromium, iron, silicon and boron contents - Inductively coupled plasma atomic emission spectrometry
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GB/T 39138.3-2020
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Basic data | Standard ID | GB/T 39138.3-2020 (GB/T39138.3-2020) | | Description (Translated English) | Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 3: Determination of chromium, iron, silicon and boron contents - Inductively coupled plasma atomic emission spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H15 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,645 | | Date of Issue | 2020-10-11 | | Date of Implementation | 2021-09-01 | | Regulation (derived from) | National Standard Announcement No. 21 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39138.3-2020: Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 3: Determination of chromium, iron, silicon and boron contents - Inductively coupled plasma atomic emission spectrometry
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Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 3.Determination of chromium, iron, silicon and boron contents - Inductively coupled plasma atomic emission spectrometry
ICS 77.120.99
H15
National Standards of People's Republic of China
Chemical analysis method of gold-nickel-chromium-iron-silicon-boron alloy
Part 3.Determination of chromium, iron, silicon and boron content
Inductively coupled plasma atomic emission spectrometry
2020-10-11 released
2021-09-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
GB/T 39138 "Methods for chemical analysis of gold-nickel-chromium-iron-silicon-boron alloys" is divided into 3 parts.
---Part 1.Determination of gold content by ferrous sulfate potentiometric titration;
---Part 2.Determination of nickel content by the diacetyl oxime gravimetric method;
---Part 3.Determination of chromium, iron, silicon, boron content inductively coupled plasma atomic emission spectrometry.
This part is Part 3 of GB/T 39138.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
This part was proposed by China Nonferrous Metals Industry Association.
This part is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243).
Drafting organizations of this section. Guiyan Platinum Co., Ltd., Jiangxi Han's Precious Metal Co., Ltd., Guiyan Testing Technology (Yunnan) Co., Ltd.
Company, Xi'an Hantang Analysis and Testing Co., Ltd., National Standard (Beijing) Inspection and Certification Co., Ltd., Zijin Mining Group Co., Ltd., Changchun Huang
Gold Research Institute Co., Ltd., Guangdong Industrial Analysis and Testing Center, Beijing Research Institute of Nonferrous Metals and Rare Earth Applications.
The main drafters of this section. Jin Yaqiu, Jia Guifa, Chen Dengquan, Zhao Wenhu, Zhu Wuxun, Fu Shimei, Yu Fengshan, Liu Leilei, Song Yiyun,
Hou Chuan, Lan Li, Long Xiujia, Lu Xingen, Su Guangdong, Li Xiaoling, Chen Xiaodong, Yanfengbo, Xu Haiyan.
Chemical analysis method of gold-nickel-chromium-iron-silicon-boron alloy
Part 3.Determination of chromium, iron, silicon and boron content
Inductively coupled plasma atomic emission spectrometry
1 Scope
This part of GB/T 39138 specifies the determination method of chromium, iron, silicon and boron content in gold-nickel-chromium-iron-silicon-boron alloy.
This section applies to the determination of chromium, iron, silicon and boron content in gold-nickel-chromium-iron-silicon-boron alloys. Measuring range. Cr. 4.00%~7.00%; Fe,
Si, B. 1.00%~5.00%.
2 Method summary
The sample is dissolved with hydrochloric acid, nitric acid, and hydrochloric acid, nitric acid, and hydrofluoric acid are used when measuring silicon. In hydrochloric acid medium, inductively coupled plasma
The atomic emission spectrometer measures the mass fraction of chromium, iron, boron and silicon in the test solution.
3 Reagents and materials
Unless otherwise specified, only use reagents and distilled or deionized water or equivalent purity water confirmed to be analytically pure in the analysis.
3.1 Hydrochloric acid (ρ=1.19g/mL).
3.2 Nitric acid (ρ=1.42g/mL).
3.3 Hydrofluoric acid (ρ=1.12g/mL), excellent grade pure.
3.4 Boric acid solution (50g/L).
3.5 Chromium standard storage solution. Weigh 0.1000g metallic chromium (mass fraction ≥99.99%), place it in a 250mL beaker, and add 10mL
Hydrochloric acid (3.1), 1mL nitric acid (3.2), cover with a watch glass, and heat at low temperature to dissolve completely. Cool to room temperature. Transfer to a 100mL volumetric flask, use
Dilute to the mark with water and mix well. This solution 1mL contains 1000μg chromium.
3.6 Iron standard storage solution. Weigh 0.1000g of metal iron powder (mass fraction ≥99.99%), place it in a 250mL beaker, and add 10mL
Hydrochloric acid (3.1), cover with a watch glass, heat at low temperature to dissolve completely, transfer to a 100mL volumetric flask, dilute to the mark with water. Mix well. This solution
1mL contains 1000μg iron.
3.7 Silicon standard storage solution. Weigh 0.1000g elemental silicon (mass fraction ≥99.99%), place it in a polytetrafluoroethylene digestion tank, and add 2g
Potassium hydroxide, put it in the oven, dissolve it at 150℃ for 16h, take it out, cool it, and transfer it into a 100mL plastic volumetric flask, dilute it with water until
degree. Mix well. This solution 1mL contains 1000μg silicon.
3.8 Boron standard storage solution. Weigh 0.5720g of spectral pure boric acid (H3BO3) dried at 40℃~45℃ for 1h, and place it in 100mL stone
After dissolving in the English beaker, transfer it to a 100mL volumetric flask and dilute to the mark with water. Mix well. This solution 1mL contains 1000μg boron.
3.9 Chromium, iron, and boron mixed standard solution. Pipette 10.00mL chromium, iron, boron standard storage solution (3.5, 3.6, 3.8) into 100mL volume respectively
In the bottle, add 10mL hydrochloric acid (3.1), dilute to the mark with water. Mix well. This solution 1mL contains 100μg chromium, iron, boron.
3.10 Silicon standard solution. Pipette 10.00mL silicon standard stock solution (3.7) into a 100mL plastic volumetric flask, add 10mL hydrochloric acid
(3.1), dilute to the mark with water. Mix well. This solution 1mL contains 100μg silicon.
3.11 Argon (volume fraction ≥ 99.99%).
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