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GB/T 1819.8-2017: Methods for chemical analysis of tin concentrates -- Part 8: Determination of zinc content -- Flame atomic absorption spectrometric method
Status: Valid GB/T 1819.8: Evolution and historical versions
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| GB/T 1819.8-2017 | English | 119 |
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Methods for chemical analysis of tin concentrates -- Part 8: Determination of zinc content -- Flame atomic absorption spectrometric method
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GB/T 1819.8-2017
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| GB/T 1819.8-2004 | English | 199 |
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Methods for chemical analysis of tin concentrates -- Determination of zinc content -- Flame atomic absorption spectrometric method
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GB/T 1819.8-2004
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Basic data | Standard ID | GB/T 1819.8-2017 (GB/T1819.8-2017) | | Description (Translated English) | Methods for chemical analysis of tin concentrates -- Part 8: Determination of zinc content -- Flame atomic absorption spectrometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D41 | | Classification of International Standard | 73.060 | | Word Count Estimation | 6,642 | | 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 1819.8-2017: Methods for chemical analysis of tin concentrates -- Part 8: Determination of zinc content -- Flame atomic absorption spectrometric method
---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 tin concentrates-Part 8. Determination of zinc content-Flame atomic absorption spectrometric method
ICS 73.060
D41
National Standards of People's Republic of China
Replacing GB/T 1819.8-2004
Methods for chemical analysis of tin concentrates
Part 8. Determination of zinc content
Flame atomic absorption spectrometry
Methods for chemical analysis of tinconcentrates-
Part 8.Determinationofzinccontent-
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 the amount of tungsten trioxide; potassium 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 8.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 1819.8-2004 "Determination of tin content - Determination of zinc content by flame atomic absorption spectrometry."
This section compared with GB/T 1819.8-2004, the following major changes.
--- The text format has been modified;
--- The upper limit of measurement from the original "3.00%" to "3.50%";
--- Symmetric sample table has been modified;
--- Part of the precision has been modified;
--- 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. Yunnan Tin Group (Holdings) Co., Ltd., Beijing Mining and Metallurgy Research Institute, Beijing Nonferrous Metal Research
General Hospital, China Nonferrous Guilin Institute of Mineral Geology Co., Ltd., Hunan Nonferrous Metal Research Institute, China Inspection and Certification Group Guangxi Co., Ltd.
The main drafters of this section. Shi Ruxiang, Zhang Hongling, Han Xiao, Liu Runting, Cai Jing, Li Hongping, Zhang Diankai, Li Tian, Wang Jiaxun, Yang Deli,
Pang Wenlin, Jiang Jing.
This part replaces the standards previously issued as.
--- GB/T 1827-1979;
--- GB/T 1819.8-2004.
Methods for chemical analysis of tin concentrates
Part 8. Determination of zinc content
Flame atomic absorption spectrometry
1 Scope
GB/T 1819 provisions of this part of the Determination of tin concentrate zinc content.
This section applies to the determination of zinc concentrate tin concentrate. Measurement range .0.005% ~ 3.50%.
2 method summary
Sample with hydrochloric acid, nitric acid decomposition, hydrochloric acid medium, the use of air - acetylene flame atomic absorption spectrometer at a wavelength of 213.9nm Department,
The absorbance of zinc is measured.
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 zinc standard stock solution Weigh 0.1000g zinc metal (wZn ≥ 99.99%) in.200mL Teflon beaker, add 20mL salt
Acid (1 1), low temperature heating until completely dissolved, removed, cooled to room temperature, transferred to 1000mL volumetric flask, 50mL hydrochloric acid (3.1), with
Dilute the water to the mark and mix well. Move into plastic bottle and save. 1 mL of this solution contains 100 μg zinc.
3.4 Zinc standard solution Pipette 20.00mL zinc standard stock solution (3.3) In a.200mL volumetric flask, add 10mL hydrochloric acid (3.1), with
Dilute the water to the mark and mix well. 1 mL of this solution contains 10 μg zinc.
4 instruments
Atomic absorption spectrometer, with zinc hollow cathode lamp.
In the best working conditions of the instrument, anyone who can meet the following indicators can be used.
--- Characteristic Concentration. In a solution consistent with the matrix of the measuring solution, the characteristic concentration of zinc should not exceed 0.014μg/mL.
--- Precision. With the highest concentration of standard solution measured 10 times the absorbance, the standard deviation should not exceed its average absorbance
1.0%; 10 times with the lowest concentration of the standard solution (not "zero" concentration standard solution), the standard deviation should not exceed
0.5% of the average absorbance of the highest concentration standard solution.
--- 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 0.7.
5 sample
Sample size should not be greater than 0.074mm. The sample should be baked at 105 ℃ ± 5 ℃ oven 1h, and placed in a desiccator cooled to room temperature
spare.
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