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GB/T 11846-2015: Determination of silicon in uranium dioxide powder and pellets by spectrophotometry
Status: Valid GB/T 11846: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 11846-2015 | English | 149 |
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Determination of silicon in uranium dioxide powder and pellets by spectrophotometry
| Valid |
GB/T 11846-2015
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| GB/T 11846-1989 | English | 199 |
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Uranium dioxide powder and pellets--Determination of silicon--Spectrophotometric method
| Obsolete |
GB/T 11846-1989
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PDF similar to GB/T 11846-2015
Standard similar to GB/T 11846-2015 GB/T 10266 GB/T 11842 GB/T 11844 Basic data | Standard ID | GB/T 11846-2015 (GB/T11846-2015) | | Description (Translated English) | Determination of silicon in uranium dioxide powder and pellets by spectrophotometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F46 | | Classification of International Standard | 27.120.30 | | Word Count Estimation | 7,759 | | Date of Issue | 2015-07-03 | | Date of Implementation | 2016-02-01 | | Older Standard (superseded by this standard) | GB/T 11846-1989 | | Regulation (derived from) | National Standard Announcement 2015 No.22 | | Issuing agency(ies) | General Administration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 | | Summary | This Standard specifies the uranium dioxide powder and pellets - Determination of silicon method feeds, reagents and materials, apparatus and equipment, sample analysis step, the results of calculation and precision of the method. This Standard applies dioxide powder and pellets - Determination of uranium silicon, also apply to the determination of eight nuclear grade uranium oxide of silicon. Alkali fusion method to take an amount of 0.5 g sample, the measurement range of 10 ��g/g ~ 80 ��g when/g, acid digestion method for the sampling of 0.2 g, measured in the range of 10 ��g/g ~ 300 ��g/g. | GB/T 11846-2015: Determination of silicon in uranium dioxide powder and pellets by spectrophotometry
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Determination of silicon in uranium dioxide powder and pellets by spectrophotometry
ICS 27.120.30
F46
National Standards of People's Republic of China
Replacing GB/T 11846-1989
Determination of uranium dioxide powder and pellets of silicon
Issued on. 2015-07-03
2016-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 11846-1989 "uranium dioxide powder and pellets - Determination of silicon by spectrophotometry."
This standard compared with GB/T 11846-1989, the main changes are as follows.
--- Increased nitric - hydrofluoric acid sample dissolution method (see 6.3);
--- "Range" in the measurement range increases the acid-soluble law;
--- "Method summary" added sample dissolution temperature of the acid-soluble law;
--- "The precision" in the table header increased the "r, R" replaced "Sr, SR", modify the printing errors, increase acid
The method of solution method precision.
The standard proposed by China National Nuclear Corporation.
This standard by the National Standardization Technical Committee on Nuclear Energy (SAC/TC58) centralized.
This standard was drafted. China Jianzhong Nuclear Fuel Limited.
The main drafters of this Standard. Liang Hua, Xu Jianping, Lin Weizhi.
This standard replaces the standards previously issued as follows.
--- GB/T 11846-1989.
Determination of uranium dioxide powder and pellets of silicon
Spectrophotometry
1 Scope
This standard specifies the uranium dioxide powder and pellets - Determination of silicon method feeds, reagents and materials, apparatus and equipment, sample analysis step
Suddenly, the results of calculation and precision of the method.
This standard applies dioxide powder and pellets - Determination of uranium silicon, also apply to the determination of nuclear Triuranium in silicon. Alkali fusion method to take
0.5g sample volume, the measurement range of 10μg/g ~ 80μg/g; acid digestion method of sampling is 0.2g, the measurement range of 10μg/g ~ 300μg/g.
The main elements of the sample of interference allowable amount. As of 30μg/g, P is 250μg/g.
2 Method summary
Nitric acid - hydrofluoric acid 60 ℃ ~ 70 ℃ or alkali fusion method decompose the sample, at a certain pH conditions, the addition of ammonium molybdate and silicon to form a silicon
Molybdenum yellow, mixed acid medium, ascorbic acid was added to the silicon-molybdenum blue at the wavelength of 810nm (or 800nm) Department, with 5cm (or 3cm)
Cuvette with water as a reference photometrically.
3 Reagents and materials
Unless otherwise indicated, the analysis should be used in line with national standards for gifted class pure reagents. The water meets conductivity (25 ℃) is not greater than
0.1mS/m.
3.1 Reagents
3.1.1 sodium carbonate (Na2CO3).
3.1.2 hydrofluoric acid (HF), ρ = 1.15g/mL.
3.1.3 boric acid solution, 35g/L.
3.1.4 ammonium molybdate [(NH4) 6Mo7O24 · 4H2O] solution, 50g/L, the clarified solution was used.
3.1.5 sulfuric acid solution, 1.5mol/L.
3.1.6 ascorbic acid (C6H8O6) solution, 10g/L, the solution was formulated the day of use.
3.1.7 nitric acid (HNO3), ρ = 1.40g/mL.
3.1.8 nitric acid solution by (3.1.7) formulated with water volume ratio of 1.
3.1.9 2,4-dinitrophenol ethanol solution [(NO3) 2C6H3OH], 2,4-dinitrophenol weighed 0.1g, dissolved in 100mL anhydrous
Alcohol.
3.1.10 oxalic acid - sulfuric acid mixed solution, weighed 45g oxalic acid (H2C2O4 · 2H2O) in 1000mL beaker, add appropriate amount of water to dissolve
After stirring at constant, sulfuric acid was slowly added to about 175mL (ρ = 1.84g/mL). After cooling to transfer 1000mL volumetric flask, add
Water to the mark, into a polyethylene bottle save.
3.1.11 ammonia, before use by distillation or diffusion purified.
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