Search result: YS/T 254.3-2011 (YS/T 254.3-1994 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YS/T 254.3-2011 | English | 159 |
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Methods for chemical analysis of beryllium concentrate and beryl. Part 3: Determination of phosphorus content. Phosphomlybdium vanadic acid spectrophotometry
| Valid |
YS/T 254.3-2011
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| YS/T 254.3-1994 | English | 199 |
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Methods for chemical analysis of beryllium concentrates-beryl The molybdenum blue photometric method for the determination of phosphorus content
| Obsolete |
YS/T 254.3-1994
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| Standard ID | YS/T 254.3-2011 (YS/T254.3-2011) | | Description (Translated English) | Methods for chemical analysis of beryllium concentrate and beryl. Part 3: Determination of phosphorus content. Phosphomlybdium vanadic acid spectrophotometry | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | D43 | | Classification of International Standard | 73.060 | | Word Count Estimation | 6,657 | | Date of Issue | 2011-12-20 | | Date of Implementation | 2012-07-01 | | Older Standard (superseded by this standard) | YS/T 254.3-1994 | | Issuing agency(ies) | Ministry of Industry and Information Technology of the People's Republic of China | | Summary | This standard specifies the beryllium ore, determination of phosphorus content beryl. This standard applies to beryllium ore, determination of phosphorus in beryl. Measuring range: 0. 010% to 2. 00%. |
YS/T 254.3-2011
Methods for chemical analysis of beryllium concentrate and beryl.Part 3. Determination of phosphorus content.Phosphomlybdium vanadic acid spectrophotometry
ICS 73.060
D43
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 254.3-1994
Beryllium ore, beryl chemical analysis
Part 3. determination of phosphorus content
Molybdovanadophosphoric acid spectrophotometry
Part 3. Determinationofphosphoruscontent-
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 sections.
--- 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 3.
The partial replacement of YS/T 254.3-1994 "beryllium concentrates - beryl spectrophotometric determination of chemical analysis of the amount of phosphorus molybdenum blue" (original
GB/T 5870.3-1986).
Section compared with YS/T 254.3-1994 The main changes are as follows.
--- By the method of "molybdenum blue photometric method" to "Molybdovanadophosphoric spectrophotometry."
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is drafted. Xinjiang Institute of Nonferrous Metals, Hunan Nonferrous Metals Group Co., Ltd. Shuikoushan, Hunan Nonferrous Metal Research Institute.
The main drafters of this section. Guan Yuzhen, Cheng Hongwei, Xie Yi Bin, Li Qingchun, Liu Siyu, Zhang Xuelian.
This part of the standard replaces the previous editions are.
--- GB/T 5870.3-1986, YS/T 254.3-1994.
Beryllium ore, beryl chemical analysis
Part 3. determination of phosphorus content
Molybdovanadophosphoric acid spectrophotometry
1 Scope
This section YS/T 254 provisions of the beryllium ore, beryl determination of phosphorus content.
This section applies to beryllium ore, beryl determination of phosphorus. Determination range of 0.010% to 2.00%.
2 Method summary
Sample with sodium hydroxide melt, with the flooding in nitric acid medium, phosphate ions with ammonium vanadate and molybdate form soluble phosphorus molybdenum
Vanadate yellow complex in a spectrophotometer at a wavelength of 420nm, absorbance was measured.
3 Reagents
3.1 Sodium hydroxide (excellent pure).
Nitrate 3.2 (ρ1.42g/mL).
3.3 ethanol.
3.4 nitric acid solution (11).
3.5 nitric acid solution (13).
3.6 ammonium molybdate solution (100g/L). 10g of ammonium molybdate was dissolved in 80mL water, cooled diluted to 100mL.
3.7 ammonium vanadate solution (3g/L). 0.3g of ammonium metavanadate were dissolved in 50mL water, and 50mL was added a solution of nitric acid (3.4), and cooled.
3.8 Ammonium vanadate - molybdate mixed solution. The ammonium molybdate solution (3.6) was added slowly with constant stirring to the ammonium vanadate solution (3.7) and (when used
Existing service).
3.9 pairs nitrophenol ethanol solution (2g/L).
3.10 P standard stock solution. Weigh 0.4394g advance at 105 ℃ ~ 110 ℃ bake 2h and cooled to room temperature in desiccator phosphate
Potassium dihydrogen [w (KH2PO4) ≥99.9%], placed in 250mL beaker, dissolved in water and transferred to 500mL volumetric flask, dilute with water to
Volume, and mix. 1mL of this solution is equivalent to 200μg phosphorus.
3.11 Phosphorus standard solution. Pipette 20.00mL phosphorus standard stock solution (3.10), placed in 200mL volumetric flask, dilute to the mark,
Mix well. 1mL of this solution is equivalent to 20μg phosphorus.
4 Instrument
Spectrophotometer.
5 Sample
5.1 Beryllium concentrate, Beryl should be through the sieve of 0.074mm sieve.
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