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GB/T 1819.16-2017: Methods for chemical analysis of tin concentrates -- Part 16: Determination of silver content -- Flame atomic absorption spectrometry
Status: Valid GB/T 1819.16: Evolution and historical versions
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| GB/T 1819.16-2017 | English | 119 |
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Methods for chemical analysis of tin concentrates -- Part 16: Determination of silver content -- Flame atomic absorption spectrometry
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GB/T 1819.16-2017
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| GB/T 1819.16-2006 | English | 279 |
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Methods for chemical analysis of tin concentrates -- Determination of silver content -- Flame atomic absorption spectrometric method
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GB/T 1819.16-2006
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Basic data | Standard ID | GB/T 1819.16-2017 (GB/T1819.16-2017) | | Description (Translated English) | Methods for chemical analysis of tin concentrates -- Part 16: Determination of silver content -- Flame atomic absorption spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D41 | | Classification of International Standard | 73.060 | | Word Count Estimation | 6,623 | | Date of Issue | 2017-09-29 | | Date of Implementation | 2018-04-01 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 1819.16-2017: Methods for chemical analysis of tin concentrates -- Part 16: Determination of silver content -- Flame atomic absorption spectrometry
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Methods for chemical analysis of tin concentrats - Part 16. Determination of siliver content - Flame atomic absorption spectrometry
ICS 73.060
D41
National Standards of People's Republic of China
Replacing GB/T 1819.16-2006
Methods for chemical analysis of tin concentrates
Part 16. Determination of silver content
Flame atomic absorption spectrometry
Methods for chemical analysis of tinconcentrats-
Part 16.Determinationofsilivercontent-
2017-09-29 Posted
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
GB/T 1819 "tin concentrate chemical analysis method" is divided into 21 parts.
--- Part 1. Determination of moisture thermal drying method;
--- Part 2. Determination of tin content potassium iodate titration;
--- Part 3. Determination of iron content cerium sulfate titration method;
--- Part 4. Determination of lead content by flame atomic absorption spectrometry and Na2 EDTA titration;
--- Part 5. Determination of arsenic Arsenic antimony molybdenum blue spectrophotometry and iodometric titration;
--- Part 6. Determination of the amount of antimony; malachite green spectrophotometry and flame atomic absorption spectrometry;
--- Part 7. Determination of bismuth content by flame atomic absorption spectrometry;
--- Part 8. Determination of zinc content by flame atomic absorption spectrometry;
--- Part 9. Determination of tungsten oxide content; thiocyanate spectrophotometry;
--- Part 10. Determination of sulfur content High-frequency induction furnace combustion infrared absorption method and potassium iodate titration;
--- Part 11. Determination of the amount of aluminum oxide chromium azure S spectrophotometry;
--- Part 12. Determination of the amount of silica silicon molybdenum blue spectrophotometry and sodium hydroxide titration;
--- Part 13. Determination of magnesia, calcium oxide content; Flame atomic absorption spectrometry;
--- Part 14. Determination of copper content by flame atomic absorption spectrometry;
--- Part 15. Determination of fluorine content ion selective electrode method;
--- Part 16. Determination of silver content; Flame atomic absorption spectrometry;
--- Part 17. Determination of mercury content; atomic fluorescence spectrometry;
--- Part 18. Determination of nickel content by flame atomic absorption spectrometry;
--- Part 19. Determination of cobalt content; Flame atomic absorption spectrometry;
--- Part 20. Determination of cadmium content by flame atomic absorption spectrometry;
--- Part 21. Determination of calcium, magnesium, copper, lead, zinc, arsenic, antimony, bismuth, silver content Inductively coupled plasma atomic emission spectrometry.
This section GB/T 1819 Part 16.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part Replaces GB/T 1819.16-2006 "Methods for chemical analysis of tin concentrates Determination of silver content flame atomic absorption spectrometry."
This section compared with GB/T 1819.16-2006, the following major changes.
--- Determination of the medium from the original "thiourea - hydrochloric acid" to "hydrochloric acid - nitric acid" medium.
--- Modify the precision part;
--- Increase the test report terms.
This part is proposed by China Nonferrous Metal Industry Association.
This part of the National Non-ferrous Metal Standardization Technical Committee (SAC/TC243) centralized.
This section is responsible for the drafting unit. Yunnan Tin Industry Co., Ltd..
Participated in the drafting of this section. Hunan Nonferrous Metal Research Institute, Beijing Mining and Metallurgy Research Institute, Guangdong Provincial Industrial Analysis and Testing Center, China Inspection
Certification Group.
The main drafters of this section. Zhang Guibing, Tan Yong, Yang Deli, Pang Wenlin, Feng Zhenhua, Wang Haoying, Mailibi, Chen Xiaodong, Qiu Xingwang,
Zhong Guiyuan, Shi Yunchun, Xu Jie Yu, Huang Puying.
This part replaces the standards previously issued as.
--- GB/T 1819.16-2006.
Methods for chemical analysis of tin concentrates
Part 16. Determination of silver content
Flame atomic absorption spectrometry
1 Scope
GB/T 1819 provisions of this part of the Determination of silver concentrate in tin concentrate.
This section applies to the determination of silver concentrate tin concentrate. Determination range .0.0010% ~ 0.1000%.
2 method summary
Sample with hydrochloric acid, nitric acid decomposition, hydrochloric acid - nitric acid medium, the use of air - acetylene flame atomic absorption spectrometer wavelength 328.1nm
Department, measuring the absorbance of silver.
3 reagent
Unless otherwise specified, only reagents that are identified as analytically pure and secondary water are used in the analysis.
3.1 Hydrochloric acid (p = 1.19 g/mL).
3.2 Nitric acid (p = 1.42 g/mL).
3.3 mixed acid hydrochloric acid nitric acid (3 1), formulated with time.
3.4 Nitric acid (1 1).
3.5 Ammonium fluoride solution (500 g/L).
3.6 silver standard storage solution Weigh 0.5000g silver metal (wAg ≥ 99.99%) in.200mL beaker, add 20mL nitric acid
(3.4), cover the surface dish, slightly heated to dissolve completely, boil away nitrogen oxides, remove, cool to room temperature, water surface dishes, into 1000mL
Brown volumetric flask, add 20mL nitric acid (3.4), diluted with water to the mark, mix well, this solution 1mL containing 500μg silver.
3.7 silver standard solution Pipette 10.00mL silver standard stock solution (3.6) in 250mL brown volumetric flask. Add 10 mL of nitric acid
(3.4), diluted with water to the mark, mix well. This solution 1 mL contains 20 μg of silver.
4 instruments
Atomic absorption spectrometer, silver hollow cathode lamp.
In the best working conditions of the instrument, anyone who can meet the following indicators can be used.
--- Characteristic concentration In the solution in accordance with the matrix of the measurement solution, the characteristic concentration of silver should not exceed 0.03μg/mL.
--- Precision. With the highest concentration of standard solution measured 10 times the absorbance, the standard deviation should not exceed 1.0% of the average absorbance;
Measure the absorbance 10 times with the lowest standard solution (not the "zero" standard solution), and the standard deviation should not exceed the maximum
Concentration Standard solution 0.5% of the average absorbance.
--- Work curve linearity. The standard curve is divided into five equal concentrations, the highest segment of the absorbance difference and the lowest segment of the absorbance difference
Than, should not be less than 0.9.
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