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GB/T 39143-2020: Methods for chemical analysis of gold-arsenic alloys - Determination of arsenic content - Inductively coupled plasma atomic emission spectrometry
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| GB/T 39143-2020 | English | 119 |
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Methods for chemical analysis of gold-arsenic alloys - Determination of arsenic content - Inductively coupled plasma atomic emission spectrometry
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GB/T 39143-2020
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Basic data | Standard ID | GB/T 39143-2020 (GB/T39143-2020) | | Description (Translated English) | Methods for chemical analysis of gold-arsenic alloys - Determination of arsenic content - 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 | 6,617 | | 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 39143-2020: Methods for chemical analysis of gold-arsenic alloys - Determination of arsenic content - Inductively coupled plasma atomic emission spectrometry
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Methods for chemical analysis of gold-arsenic alloys - Determination of arsenic content - Inductively coupled plasma atomic emission spectrometry
ICS 77.120.99
H15
National Standards of People's Republic of China
Gold-arsenic alloy chemical analysis method
Determination of arsenic 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
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
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. Beijing Institute of Nonferrous Metals and Rare Earth Application, Beijing Metallurgical Product Quality Supervision and Inspection Station, Beijing Dabo You
Ferrous Metal Solder Co., Ltd., Nanjing Product Quality Supervision and Inspection Institute, Shenzhen Zhongjin Lingnan Nonferrous Metal Co., Ltd., Guangdong
Provincial Industrial Analysis and Testing Center, Changchun Gold Research Institute Co., Ltd., Beikuang Testing Technology Co., Ltd., Henan Zhongyuan Gold Smelter Co., Ltd.
Ren company, Fujian Zijin Mining and Metallurgy Testing Technology Co., Ltd.
The main drafters of this standard. Zhi Fuguo, Wang Wei, Chen Xiaoyu, Han Peng, Xu Lijuan, Liu Ying, Yan Ru, Yu Jieli, Gao Ruifeng, Cao Xiaoyong, Zuo Hongyi,
Hu Yanzhi, Chen Xiaolan, Zhang Sheng, Su Guangdong, Han Xiao, Liu Chengxiang, Lu Xiaolong.
Gold-arsenic alloy chemical analysis method
Determination of arsenic content
Inductively coupled plasma atomic emission spectrometry
1 Scope
This standard specifies the method for determination of arsenic content in gold-arsenic alloys.
This standard applies to the determination of arsenic content in gold-arsenic alloys. Measuring range. 0.10%~3.00%.
2 Principle
The sample was dissolved in a mixed acid of hydrochloric acid and nitric acid, and measured with an inductively coupled plasma atomic emission spectrometer to calculate the mass fraction of arsenic.
3 Reagents and materials
Unless otherwise specified, only the pure reagents and deionized water confirmed to be superior grade are used in the analysis.
3.1 Hydrochloric acid (ρ1.19g/mL).
3.2 Nitric acid (ρ1.42g/mL).
3.3 Hydrochloric acid (1 1).
3.4 Mixed acid. Mix 3 volumes of hydrochloric acid (3.1) and 1 volume of nitric acid (3.2), and prepare them when used.
3.5 Arsenic standard storage solution. Weigh 0.1320g of arsenic trioxide (reference reagent, pre-placed in a concentrated sulfuric acid dryer to dry to constant weight)
In a 100mL beaker, add 10mL sodium hydroxide solution (200g/L) to dissolve, cool, transfer to a 100mL volumetric flask, add 10mL
Hydrochloric acid (3.1), dilute to the mark with water, and mix well. This solution 1mL contains 1000μg arsenic.
3.6 Arsenic standard solution. accurately pipette 10.00mL arsenic standard stock solution (3.5) into a 100mL volumetric flask, add 10mL hydrochloric acid
(3.1) Dilute to the mark with water and mix well. This solution 1mL contains 100μg arsenic.
3.7 Argon (volume fraction ≥99.99%).
4 Instruments
Inductively coupled plasma atomic emission spectrometer. Under the best conditions of the instrument, it can be used where the following indicators can be achieved.
---Resolution. The optical resolution at.200nm is not greater than 0.008nm; the optical resolution at 400nm is not greater than 0.020nm.
---Instrument stability. Under the best working conditions of the instrument, measured 11 times with 1.0μg/mL copper standard solution, and its emission intensity
The relative standard deviation does not exceed 2.0%.
5 Sample
Process the sample into chips not larger than 1mm.
6 Test procedure
6.1 Sample
Weigh 0.10g sample, accurate to 0.0001g.
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