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GB/T 18114.6-2010: Chemical analysis methods of rare earth concentrates -- Part 6: Determination of silicon oxide content
Status: Valid GB/T 18114.6: Evolution and historical versions
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Chemical analysis methods of rare earth concentrates -- Part 6: Determination of silicon oxide content
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GB/T 18114.6-2010
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| GB/T 18114.6-2000 | English | 199 |
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Methods for chemical analysis of monazite concentrates. Determination of sillicon oxide content
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GB/T 18114.6-2000
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Basic data | Standard ID | GB/T 18114.6-2010 (GB/T18114.6-2010) | | Description (Translated English) | Chemical analysis methods of rare earth concentrates -- Part 6: Determination of silicon oxide content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H14 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 9,933 | | Date of Issue | 1/14/2011 | | Date of Implementation | 11/1/2011 | | Older Standard (superseded by this standard) | GB/T 18114.6-2000 | | Regulation (derived from) | Announcement of Newly Approved National Standards 2011 No. (No. 167 overall) 2 | | 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 Determination of rare earth concentrates in silica content. This Standard is applicable to the determination of silicon dioxide content of rare earth concentrates. Method 1 Measurement range: 0. 10 to 6. 00%; Method 2 Measurement range: 1. 00% to 10. 00%. | GB/T 18114.6-2010: Chemical analysis methods of rare earth concentrates -- Part 6: Determination of silicon oxide content
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Chemical analysis methods of rare earth concentrates Part 6. Determination of silicon oxide content
ICS 77.120.99
H14
National Standards of People's Republic of China
Replacing GB/T 18114.6-2000
Methods for chemical analysis of rare earth concentrates
Part 6. Determination of the amount of silica
Part 6. Determinationofsiliconoxidecontent
Issued on. 2011-01-14
2011-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 18114 "Methods for chemical analysis of rare earth concentrates" is divided into 11 parts.
--- Part 1. Determination of total rare earth oxide gravimetric method;
--- Part 2. Determination of thorium oxide content;
--- Part 3. Determination of calcium oxide content;
--- Part 4. niobium oxide, zirconium oxide, titanium oxide content - Inductively coupled plasma atomic emission spectrometry;
--- Part 5. aluminum oxide content - Inductively coupled plasma atomic emission spectrometry;
--- Part 6. Determination of the amount of silica;
--- Part 7. Determination of the amount of iron oxide dichromate method;
--- Part 8. fifteen rare earth element oxide with components measured by inductively coupled plasma atomic emission spectrometry;
--- Part 9. Determination of the amount of phosphorus pentoxide bismuth molybdenum blue spectrophotometric method;
--- Part 10. Determination of moisture content - Gravimetric method;
--- Part 11. Determination of the amount of fluorine EDTA titration.
Part is divided into 6 sections.
This part is GB/T 18114.6-2000 "Methods for chemical analysis of monazite concentrates - Determination of the amount of silica" amendment.
This section compared with the GB/T 18114.6-2000, have the following main changes.
--- Adjustment adopted by the gravimetric method for the molybdenum blue spectrophotometry and inductively coupled plasma atomic emission spectrometry;
--- Increasing the precision of the terms;
--- Increased quality assurance and control provisions.
When analyzing the scope of the two methods overlap to 1 arbitration method.
This part of the National Standardization Technical Committee of rare earth (SAC/TC229) centralized.
This section is Baotou Rare Earth Research Institute, China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting.
Part 1 was drafted by the Baotou Rare Earth Research Institute.
Method 1 of this section by the Ganzhou Nonferrous Metallurgy Research Institute, Guangdong Zhujiang Rare Earth Co., Ltd. participated in the drafting.
The main drafters of this Part 1. Wang Anli, Hao Qian
Method 1 of this section participate drafters. Li Ying, Liu Hong, Liang Zhijie, Denghan Qin.
Method 2 This part was drafted by the Baotou Rare Earth Research Institute.
Method 2 of this section by the Ganzhou Nonferrous Metallurgy Research Institute, Guangdong Zhujiang Rare Earth Co., Ltd. participated in the drafting.
The main drafters of this section Method 2. Yumei, Liu Xiaojie.
Method 2 of this section participate drafters. Li Ying, Liu Hong, Song Yao, Denghan Qin.
This part of the standard replaces the previous editions are.
--- GB/T 18114.6-2000.
Methods for chemical analysis of rare earth concentrates
Part 6. Determination of the amount of silica
1 Scope
GB/T 18114 provisions of this part of the determination of silicon dioxide content of rare earth concentrates.
This section applies to the determination of silicon dioxide content of rare earth concentrates. Method 1 Measuring range. 0.10 to 6.00%; Method 2 Determination Fan
Wai. 1.00% to 10.00%.
Molybdenum blue spectrophotometric method
2 principle of the method
Sample with sodium hydroxide - fusion with sodium peroxide, in the presence of a certain acidity and lower alcohol, silicic acid and ammonium molybdate generate Si - Mo heteropoly acid, in
Oxalic acid in the presence of sulfuric acid mixed with ferrous reducing Si - Mo heteropoly acid into silicon molybdenum blue heteropoly acid was measured at a wavelength of 785nm.
3 Reagents and materials
3.1 sodium hydroxide, pure class distinctions.
3.2 sodium peroxide, pure class distinctions.
3.3 anhydrous sodium carbonate, pure class distinctions.
3.4 hydrochloric acid (ρ1.19g/mL), pure class distinctions.
3.5 hydrochloride (13).
3.6 Ammonia (14), pure class distinctions.
3.7 Ethanol (95%).
3.8 ammonium molybdate solution 50g/L.
3.9 oxalic acid solution of sulfuric acid mixed. under constant stirring in 965mL water was slowly added to 35mL sulfuric acid (ρ1.84g/mL) and 15g
Oxalic acid (excellent pure) and mix.
3.10 ferrous ammonium sulfate solution (6%). 6g ferrous ammonium sulfate dissolved in 100mL of sulfuric acid medium (5%).
3.11 pairs nitrophenol indicator solution. 1%.
Silicon 3.12 Standard stock solution. Weigh 0.1000g silica (purity > 99.9%, 120 ℃ drying 2H), placed in a platinum crucible, is added
5g anhydrous sodium carbonate (3.3), at 950 ℃ ~ 1000 ℃ melt to red transparent. Coolish after leaching with hot water, cooling. Moved
1000mL volumetric flask, dilute with water to volume, and mix. Immediately transferred to a polyethylene bottle preservation, this solution 1mL containing 100μg dioxide
Silicon.
3.13 Silicon standard solution. Pipette 20.00mL silicon standard stock solution (3.12) into 100mL volumetric flask, dilute to the mark with water, mix
uniform. This solution 1mL containing 20μg silica, immediately transferred to a polyethylene bottle save.
4 Instrument
722 spectrophotometer.
5 Sample
The sample size should be 5.1 to grind through the 0.074mm sieve.
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