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GB/T 39138.2-2020: Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 2: Determination of nickel content - Dimethylglyoxime gravimetric method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 39138.2-2020 | English | 119 |
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Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 2: Determination of nickel content - Dimethylglyoxime gravimetric method
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GB/T 39138.2-2020
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Basic data | Standard ID | GB/T 39138.2-2020 (GB/T39138.2-2020) | | Description (Translated English) | Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 2: Determination of nickel content - Dimethylglyoxime gravimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H15 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,675 | | 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 39138.2-2020: Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 2: Determination of nickel content - Dimethylglyoxime gravimetric method
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Methods for chemical analysis of gold nickel chromium iron silicon boron alloys - Part 2.Determination of nickel content - Dimethylglyoxime gravimetric method
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 2.Determination of Nickel Content
Diacetyl oxime gravimetric method
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 and boron" is divided into three 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 2 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., Shenzhen Zhongjin Lingnan Nonferrous Metal Co., Ltd., Guiyan Testing Technology
(Yunnan) Co., Ltd., Jiangxi Han's Precious Metal Co., Ltd., Xi'an Hantang Analysis and Testing Co., Ltd., National Standard (Beijing) Inspection and Certification Co., Ltd.
The company, Zijin Mining Group Co., Ltd., Guangdong Industrial Analysis and Testing Center, Changchun Gold Research Institute Co., Ltd., Beijing Nonferrous Metals and Rare Earth Application Research Institute.
The main drafters of this section. Jin Yaqiu, Fu Shimei, Liang Jie, Zhu Wuxun, Lu Ruizhi, Yuan Mengyan, Zuo Hongyi, Shi Shilong, Yu Fengshan,
Yang Pingping, Liu Leilei, Sun Baolian, Zhang Linna, Wang Lele, Yang Yehao, Luo Ronggen, Xie Hui, Chen Xiaolan, Chen Yonghong, Su Guangdong, Xu Zhao, Zhang Juan.
Chemical analysis method of gold-nickel-chromium-iron-silicon-boron alloy
Part 2.Determination of Nickel Content
Diacetyl oxime gravimetric method
1 Scope
This part of GB/T 39138 specifies a method for the determination of nickel content in gold-nickel-chromium-iron-silicon-boron alloys.
This section applies to the determination of nickel content in gold-nickel-chromium-iron-silicon-boron alloys. Measuring range. 60.00%~80.00%.
2 Method principle
The sample is decomposed with hydrochloric acid and a saturated solution of nitric acid-potassium chlorate. Sulfurous acid eliminates the interference of gold. In ammonia medium, nickel and diacetyl oxime produce
The precipitate is separated from other elements, the precipitate is filtered, washed and dried to constant weight, and the mass fraction of nickel is calculated. At the same time, the filtrate uses air-acetylene fire
Flame, in hydrochloric acid medium, at the wavelength of 232.00nm of atomic absorption spectrometer, measure the absorbance of nickel, and calculate the amount of nickel by working curve method.
Correction.
3 reagent
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 Potassium chlorate.
3.2 Ammonium chloride.
3.3 Hydrochloric acid (ρ=1.19g/mL).
3.4 Nitric acid (ρ=1.42g/mL).
3.5 Sulfurous acid (ρ=1.03g/mL).
3.6 Hydrochloric acid (1 1).
3.7 Nitric acid (1 1).
3.8 Ammonia (1 1).
3.9 Ammonia washing solution (1 19).
3.10 Nitric acid-potassium chlorate saturated solution. Dissolve potassium chlorate (3.1) in nitric acid (3.4) until saturated.
3.11 Potassium sodium tartrate solution (200g/L), use after filtration.
3.12 Ammonium acetate solution (200g/L), use after filtration.
3.13 Diacetyl oxime ethanol solution (10g/L), use after filtration.
3.14 Nickel standard storage solution. Weigh 0.1000g of metallic nickel (mass fraction ≥99.99%), place it in a 250mL beaker, and add 10mL
Nitric acid (3.7), 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 nickel.
3.15 Nickel standard solution. Pipette 10.00mL nickel standard stock solution (3.14) into a 100mL volumetric flask, add 10mL hydrochloric acid (3.6),
Dilute to the mark with water. Mix well. This solution 1mL contains 100μg nickel.
4 Instruments
4.1 Glass sand core crucible, 30mL, G4 (glass sand core crucible model). pore size 4μm~7μm.
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