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YS/T 254.2-2011: Methods for chemical analysis of beryllium concentrate and beryl. Part 2: Determination of ferric oxide content. EDTA titrimetry and sulfosalicylic acid spectrophotometry
Status: Valid YS/T 254.2: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YS/T 254.2-2011 | English | 209 |
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Methods for chemical analysis of beryllium concentrate and beryl. Part 2: Determination of ferric oxide content. EDTA titrimetry and sulfosalicylic acid spectrophotometry
| Valid |
YS/T 254.2-2011
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| YS/T 254.2-1994 | English | 199 |
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Methods for chemical analysis of beryllium concentrates-beryl The EDTA volumetric method for the determination of ferric sesquioxide content
| Obsolete |
YS/T 254.2-1994
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PDF similar to YS/T 254.2-2011
Basic data | Standard ID | YS/T 254.2-2011 (YS/T254.2-2011) | | Description (Translated English) | Methods for chemical analysis of beryllium concentrate and beryl. Part 2: Determination of ferric oxide content. EDTA titrimetry and sulfosalicylic acid spectrophotometry | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | D43 | | Classification of International Standard | 73.060 | | Word Count Estimation | 8,821 | | Date of Issue | 2011-12-20 | | Date of Implementation | 2012-07-01 | | Older Standard (superseded by this standard) | YS/T 254.2-1994 | | Regulation (derived from) | ?MIIT Announcement 2011 No.43 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the beryllium ore, determination of beryl iron oxide content. This standard applies to beryllium ore, determination of beryl iron oxide. A method for determining the range of> 3. 00%-10. 00%, Method Two measurement range of 0. 50% to 3. 00%. | YS/T 254.2-2011: Methods for chemical analysis of beryllium concentrate and beryl. Part 2: Determination of ferric oxide content. EDTA titrimetry and sulfosalicylic acid spectrophotometry
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Methods for chemical analysis of beryllium concentrate and beryl.Part 2. Determination of ferric oxide content.EDTA titrimetry and sulfosalicylic acid spectrophotometry
ICS 73.060
D43
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 254.2-1994
Beryllium ore, beryl chemical analysis
Part 2. iron oxide contents -
EDTA titration, sulfosalicylic acid spectrophotometric method
Part 2. Determinationofferricoxidecontent-
Issued on. 2011-12-20
2012-07-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 254 "of beryllium ore, beryl chemical analysis method" is divided into seven parts.
--- Part 1. Determination of the amount of beryllium oxide phosphate gravimetric method;
--- Part 2. iron oxide contents - EDTA titration sulfosalicylic acid spectrophotometric method;
--- Part 3. Determination of phosphorus content Molybdovanadophosphoric acid spectrophotometry;
--- Part 4. Determination of the amount of lithium oxide flame atomic absorption spectrometry;
--- Part 5. Determination of the amount of fluorine ion selective electrode method;
--- Part 6. Determination of calcium oxide content by flame atomic absorption spectrometry;
--- Part 7. moisture content - Gravimetric method.
This section YS/T 254 Part 2.
The partial replacement of YS/T 254.2-1994 "beryllium concentrates - Determination of beryl chemical analysis of EDTA complexometric titration trioxide
Iron "(formerly GB/T 5870.2-1986).
Section compared with YS/T 254.2-1994 The main changes are as follows.
--- Adds two. sulfosalicylic acid spectrophotometric method;
--- Increased repeatability terms;
--- Text format has been re-edited, an increase of quality assurance and control provisions.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is drafted. Xinjiang Institute of Nonferrous Metals, Xinjiang Alashankou Exit Inspection and Quarantine, Hunan Nonferrous Metals set Shuikoushan
Group Limited.
The main drafters of this section. Guan Yuzhen, Du Songdong, SURVEYING, Mou Kun, Xie Yi Bin, Li Qingchun, Liu Hui.
This part of the standard replaces the previous editions are.
--- GB/T 5870.2-1986, YS/T 254.2-1994.
Beryllium ore, beryl chemical analysis
Part 2. iron oxide contents -
EDTA titration, sulfosalicylic acid spectrophotometric method
1 Scope
This section YS/T 254 provisions of the beryllium ore, beryl Determination of iron oxide content.
This section applies to beryllium ore, beryl determination of ferric oxide. A method for determining the range of > 3.00% - 10.00%; party
Act II measurement range of 0.50% to 3.00%.
2 EDTA Titration Method One
2.1 Method summary
Mixing the sample with an alkaline flux melted, remove the current flooding, acidified with hydrochloric acid. Acidic solution at a pH of 1.2 to 1.5 in order to sulfosalicylamide
Acid as indicator, with disodium EDTA standard solution titration, determination of the amount of ferric oxide.
2.2 Reagents
2.2.1 ammonium persulfate.
2.2.2 hydrochloric acid (ρ1.19g/mL).
2.2.3 Mixed flux. Anhydrous potassium carbonate, anhydrous sodium carbonate, sodium tetraborate proportionally 1.2.1 preparation, mix.
2.2.4 hydrochloric acid solution (15).
2.2.5 Ammonia (11), pure class distinctions.
2.2.6 sulfosalicylic acid solution (200g/L).
2.2.7 ferric oxide standard stock solution. Weigh 1.0000g advance at 105 ℃ ~ 110 ℃ bake 2h and placed in a desiccator to cool to
Room ferric oxide [w (Fe2O3) ≥99.9%], placed in 250mL beaker, add 30mL hydrochloric acid (2.2.2), cover the dish table, low
Heated until completely dissolved, removed, cooled to room temperature and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL phase
When to 1000μg ferric oxide.
2.2.8 ferric oxide standard solution. Pipette 100.00mL iron sesquioxide standard stock solution (2.2.7), placed in 500mL volumetric flask
The diluted with water mark and shake. This solution was equivalent to 200μg 1mL ferric oxide.
2.2.9 Standard solution of disodium edetate
2.2.9.1 preparation
Weigh 1.87g disodium edetate, placed in 250mL beaker, add 200 mL of water, dissolved by heating, cooled to room temperature, transferred to
1000mL volumetric flask, dilute with water to volume, and mix.
2.2.9.2 Calibration
Pipette three 10.00mL diiron trioxide standard solution (2.2.8), placed in three 250mL conical flask, 0.1g persulfate
Ammonium (2.2.1), heated to a boil and keep 3min, remove the coolish, add 8 drops of sulfosalicylic acid solution (2.2.6), with ammonia (2.2.5) in
And purple to disappear and appear reddish brown, immediately hydrochloric acid solution (2.2.4) and to purple just appeared and excess 2mL, temperature control solution
Is 60 ℃ ~ 80 ℃, with disodium edetate standard solution (2.2.9) slow titration to the disappearance of the purple is the end.
According to formula (1) calculated standard solution of disodium ethylenediamine tetraacetate titer T.
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