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GB/T 1819.7-2017: Methods for chemical analysis of tin concentrates -- Part 7: Determination of bismuth content -- Flame atomic absorption spectrometric method
Status: Valid GB/T 1819.7: Evolution and historical versions
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| GB/T 1819.7-2017 | English | 119 |
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Methods for chemical analysis of tin concentrates -- Part 7: Determination of bismuth content -- Flame atomic absorption spectrometric method
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GB/T 1819.7-2017
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| GB/T 1819.7-2004 | English | 199 |
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Methods for chemical analysis of tin concentrates -- Determination of bismuth content -- Flame atomic absorption spectrometric method
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GB/T 1819.7-2004
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Basic data | Standard ID | GB/T 1819.7-2017 (GB/T1819.7-2017) | | Description (Translated English) | Methods for chemical analysis of tin concentrates -- Part 7: Determination of bismuth 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 | 6,685 | | 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 1819.7-2017: Methods for chemical analysis of tin concentrates -- Part 7: Determination of bismuth content -- Flame atomic absorption spectrometric method
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Methods for chemical analysis of tin concentrates - Part 7. Determination of bismuth content - Flame atomic absorption spectrometric method
ICS 73.060
D41
National Standards of People's Republic of China
Replacing GB/T 1819.7-2004
Methods for chemical analysis of tin concentrates
Part 7. Determination of bismuth content
Flame atomic absorption spectrometry
Methods for chemical analysis of tinconcentrates-
Part 7.Determinationofbismuthcontent-
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 7.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB/T 1819.7-2004 "Determination of tin content of tin concentrate bismuth flame atomic absorption spectrometry", the
Part and GB/T 1819.7-2004 compared to the following major changes.
--- The text format has been modified;
--- The upper limit of determination from the original "2.00%" revised "2.50%";
--- The original "bismuth content of less than 0.04% of the sample deuterium lamp subtracted background determination" to "bismuth less than 0.10% of the sample
Deuterium lamp with background subtraction ";
--- 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., Guangzhou Nonferrous Metal Research Institute, China Inspection and Certification Set
Guangxi Group Co., Ltd., Northwest Nonferrous Metal Research Institute, Guangxi Huaxi Group Co., Ltd.
The main drafters of this section. Wang Junfeng, Shi Ruxiang, Zhang Tiao Jiao, Zhang Ting, Su Aiping, Zhang Hongling, Xie Hui, Huang Puying, Tan Jianyou, Zhou Kai,
Dong Qi, Sun Baolian, Wei Zhiming, Li Jinfei.
This part replaces the standards previously issued as.
--- GB/T 1826-1979;
--- GB/T 1819.7-2004.
Methods for chemical analysis of tin concentrates
Part 7. Determination of bismuth content
Flame atomic absorption spectrometry
1 Scope
GB/T 1819 provisions of this part of the tin concentrate Determination of bismuth.
This section applies to the determination of bismuth in tin concentrate. Determination of the range of 0.005% ~ 2.50%.
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 223.06nm
Department, measuring the absorbance of bismuth.
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 (200 g/L).
3.6 bismuth standard stock solution Weigh 0.5000g bismuth metal (wBi ≥ 99.99%) in 250mL beaker, add 20mL nitric acid
(3.4), cover the watch glass, slightly heated to dissolve completely, remove, cool to room temperature, with a small amount of water purify the watch glass and cup wall, water into the 500mL
Volumetric flask, add 50mL of nitric acid (3.2), diluted with water to the mark, mix well. This solution 1 mL contains 1 mg bismuth.
3.7 bismuth standard solution Pipette 25.00mL bismuth standard stock solution (3.6) In a 250mL volumetric flask, add 25mL nitric acid (3.2), with
Dilute the water to the mark and mix well. This solution 1 mL contains 100 μg of bismuth.
4 instruments
Atomic Absorption Spectrometer, Bismuth 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 measurement of the solution matrix, bismuth characteristic concentration should not exceed 0.14μg/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 0.70.
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
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