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GB/T 16484.4-2009: Chemical analysis methods of rare earth chloride and light rare earth carbonate -- Part 4: Determination of thorium oxide content -- Arsenazo Ⅲ spectrophotometry
Status: Valid GB/T 16484.4: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 16484.4-2009 | English | 189 |
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Chemical analysis methods of rare earth chloride and light rare earth carbonate -- Part 4: Determination of thorium oxide content -- Arsenazo Ⅲ spectrophotometry
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GB/T 16484.4-2009
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| GB/T 16484.4-1996 | English | 199 |
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Methods for chemical analysis of rare earth chloride and carbonate--Determination of thorium oxide content
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GB/T 16484.4-1996
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Basic data | Standard ID | GB/T 16484.4-2009 (GB/T16484.4-2009) | | Description (Translated English) | Chemical analysis methods of rare earth chloride and light rare earth carbonate -- Part 4: Determination of thorium oxide content -- Arsenazo �� spectrophotometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H14 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 8,894 | | Date of Issue | 2009-09-04 | | Date of Implementation | 2010-05-01 | | Older Standard (superseded by this standard) | GB/T 16484.4-1996 | | Regulation (derived from) | National Standard Approval Announcement 2009 No.12 (Total No.152) | | Issuing agency(ies)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 rare earth chloride, Determination of light rare earth carbonate in the amount of thorium oxide. This section applies to rare earth chloride, determination of light rare earth carbonate in the amount of thorium oxide. Measurement range from 0. 0001% to 0. 30 %. | GB/T 16484.4-2009: Chemical analysis methods of rare earth chloride and light rare earth carbonate -- Part 4: Determination of thorium oxide content -- Arsenazo Ⅲ spectrophotometry
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Chemical analysis methods of rare earth chloride and light rare earth carbonate Part 4. Determination of thorium oxide content ArsenazoⅢ spectrophotometry.
ICS 77.120.99
H14
National Standards of People's Republic of China
Replacing GB/T 16484.4-1996
Earth chloride and light rare earth carbonate chemical analysis methods
Part 4. Determination of thorium oxide content
Arsenazo Ⅲ spectrophotometry
Posted 2009-10-30 2010-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 16484-2009 "rare earth chloride and light rare earth carbonate chemical analysis method" is divided into 22 parts.
--- Part 1. Determination of cerium oxide content of ammonium ferrous sulfate titration;
--- Part 2. europium oxide content - Inductively Coupled Plasma Mass Spectrometry;
--- Part 3. 15 with a rare earth element oxide component measured by inductively coupled plasma atomic emission spectrometry;
--- Part 4. Determination of thorium oxide content arsenazo Ⅲ spectrophotometry;
--- Part 5. Determination of barium oxide by inductively coupled plasma atomic emission spectrometry;
--- Part 6. Determination of calcium oxide content by flame atomic absorption spectrometry;
--- Part 7. Determination of magnesium oxide content - Flame atomic absorption spectrometry;
--- Part 8. Determination of the amount of sodium oxide flame atomic absorption spectrometry;
--- Part 9. Determination of the amount of nickel oxide by flame atomic absorption spectrometry;
--- Part 10. Determination of manganese oxide content by flame atomic absorption spectrometry;
--- Part 11. Determination of lead oxide content by flame atomic absorption spectrometry;
--- Part 12. Determination of the amount of sulfate;
--- Part 13. Determination of the amount of ammonium chloride distillation - titration;
--- Part 14. Determination of the amount of phosphate phosphorus antimony molybdenum blue spectrophotometric method;
--- Part 15. light rare earth carbonate - Determination of the amount of chlorine in the silver nitrate turbidimetry;
--- Part 16. rare earth chloride in an amount of water insolubles - Gravimetric method;
--- Part 17. Determination of moisture content in rare earth carbonate;
--- Part 18. Determination of light rare earth carbonate in the weight loss on ignition method;
--- Part 20. nickel oxide, manganese oxide, lead oxide, aluminum oxide, zinc oxide, thorium oxide content - Inductively coupled plasma mass
Spectroscopy;
--- Part 21. Determination of iron oxide content of 1,10 phenanthroline spectrophotometry;
--- Part 22. Determination of the amount of zinc oxide flame atomic absorption spectrometry;
--- Part 23. Determination of carbonic acid insoluble light amount of rare earth gravimetric method.
This section GB/T Part of 416,484.
The place of "GB/T 16484.4-1996 rare earth chloride, rare earth carbonate chemical analysis of thorium oxide content determination" section.
This section compared with the GB/T 16484.4-1996, have the following main changes.
--- Increasing the precision of the terms;
--- Increased quality assurance and control;
--- Delete the original standard annotated;
--- Standard text made editorial changes.
This part of the National Standardization Technical Committee rare and centralized.
This section is responsible for drafting unit. Beijing Nonferrous Metal Research Institute, China Nonferrous Metals Industry Institute of Standards and Metrology and Quality.
This section was drafted by the Beijing Nonferrous Metal Research Institute.
Participated in the drafting of this section. Ganzhou, Jiangxi Institute of Metallurgy.
The main drafters of this section. Bing, Liu Wenhua, Jiang Weijun.
The drafters of some of the participants. Yang Feng, Pan Jianzhong.
This part of the alternative criteria previously issued as follows.
--- GB/T 16484.4-1996.
Earth chloride and light rare earth carbonate chemical analysis methods
Part 4. Determination of thorium oxide content
Arsenazo Ⅲ spectrophotometry
1 Scope
GB/T 16484 provisions of this part of the determination of earth chloride and light rare earth carbonate in the amount of thorium oxide.
This section applies to rare earth, light rare earth carbonate - Determination of the amount of thorium oxide chlorination. Measurement range. 0.0001% to 0.30%.
Principle 2
The sample was dissolved in nitric acid or hydrochloric acid, at pH < 2 in hydrochloric acid medium with PMBP- butyl acetate solution was extracted thorium to separate rare earths. use
6mol/L hydrochloric acid, and extracted thorium, measured at 650nm wavelength spectrophotometer and thorium arsenazo Ⅲ complex absorbance.
3 Reagents
3.1 hydrochloride (ρ1.19g/mL).
Nitrate 3.2 (ρ1.42g/mL).
3.3 perchloric acid (ρ1.67g/mL).
3.4 Hydrogen peroxide (30%).
3.5 HCl (1 + 1).
3.6 hydrochloric acid (1 + 49).
Ammonia 3.7 (1 + 9).
3.8 Phenyl-3-methyl-4-benzoyl - pyrazolone -5 (PMBP) - butyl acetate solution (10g/L). Weigh 5gPMBP, plus 500mL
Butyl acetate dissolved.
3.9 acid buffer solution. Weigh 87g chloroacetic acid, add 1L of water was dissolved, the pH was adjusted to 2.0 with hydrochloric acid (3.5) and ammonia (3.7).
3.10 thoria standard stock solution. Weigh 0.1000g by 110 ℃ dried and placed in a desiccator to cool to room temperature in thorium dioxide
100mL beaker, add 10mL of hydrochloric acid (3.5), 1 drop of hydrofluoric acid (1 + 19), low-temperature heating until completely dissolved and evaporated to about 1mL,
Plus 5mL hydrochloric acid (3.5), and evaporation was continued until about 1mL, repeat the operation once to rush to make a fluoride ion. Cooling to room temperature, transferred to 1000mL
Flask dilute to volume, and mix. This solution 1mL containing 100μg of thorium oxide.
3.11 thorium oxide standard solution. Pipette 5.00mL thorium standard stock solution (3.10) in 200mL volumetric flask (3.6) with dilute hydrochloric acid
To the mark, and mix. This solution 1mL containing 2.5μg thorium oxide.
3.12 arsenazo Ⅲ solution (1g/L).
3.13 cresol red solution (1g/L).
4 Equipment
Spectrophotometer.
5 Sample
5.1 Preparation of rare earth chloride sample. A sample was crushed, quickly placed in a weighing bottle immediately weighed.
5.2 Preparation of light rare earth carbonate sample. weigh the sample immediately after the opening.
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