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YS/T 555.8-2009: Methods for chemical analysis of molybdenum concentrate. Determination of tungsten content. Thiocyanate spectrophotometry
Status: Valid YS/T 555.8: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YS/T 555.8-2009 | English | 169 |
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Methods for chemical analysis of molybdenum concentrate. Determination of tungsten content. Thiocyanate spectrophotometry
| Valid |
YS/T 555.8-2009
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| YS/T 555.8-2006 | English | 199 |
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Molybdenum concentrates. Determination of tungsten content
| Obsolete |
YS/T 555.8-2006
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PDF similar to YS/T 555.8-2009
Basic data | Standard ID | YS/T 555.8-2009 (YS/T555.8-2009) | | Description (Translated English) | Methods for chemical analysis of molybdenum concentrate. Determination of tungsten content. Thiocyanate spectrophotometry | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H14;D43 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 6,698 | | Date of Issue | 2009-12-04 | | Date of Implementation | 2010-06-01 | | Older Standard (superseded by this standard) | YS/T 555.8-2006 | | Regulation (derived from) | MIIT [2009] No. 66 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the determination of tungsten molybdenum method. This standard applies to the determination of tungsten molybdenum. Measuring range: 0. 020% to 3. 00 % | YS/T 555.8-2009: Methods for chemical analysis of molybdenum concentrate. Determination of tungsten content. Thiocyanate spectrophotometry
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Methods for chemical analysis of molybdenum concentrate.Determination of tungsten content.Thiocyanate spectrophotometry
ICS 77.120.99
H14
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 555.8-2006
Methods for chemical analysis of molybdenum concentrate
Determination of tungsten content of Thiocyanate spectrophotometric
Posted 2009-12-04
2010-06-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 555 "Methods for chemical analysis of molybdenum concentrate" includes 11 parts.
YS/T 555.1 Methods for chemical analysis of molybdenum concentrate molybdenum content of lead molybdate assay gravimetric method
YS/T 555.2 Methods for chemical analysis of molybdenum concentrate - Determination of silicon dioxide content and weight of molybdenum blue spectrophotometric method
YS/T 555.3 Methods for chemical analysis of molybdenum concentrate and the amount of arsenic antimony content - Atomic Fluorescence Spectrometry and DDTC-Ag spectrophotometer
DEGREE
YS/T 555.4 Methods for chemical analysis of molybdenum concentrate tin content - Atomic Fluorescence Spectrometry
YS/T 555.5 Methods for chemical analysis of molybdenum concentrate phosphorus content of molybdenum blue spectrophotometric determination of phosphorus
YS/T 555.6 Methods for chemical analysis of molybdenum concentrate copper, lead, bismuth, zinc content - Flame Atomic Absorption Spectrometry
YS/T 555.7 Methods for chemical analysis of molybdenum concentrate calcium oxide content by flame atomic absorption spectrometry
YS/T 555.8 Methods for chemical analysis of molybdenum concentrate - Determination of tungsten content - Thiocyanate spectrophotometric method
YS/T 555.9 Methods for chemical analysis of molybdenum concentrate the amount of potassium and sodium contents - Flame Atomic Absorption Spectrometry
YS/T 555.10 Methods for chemical analysis of molybdenum concentrate rhenium contents - Thiocyanate spectrophotometric
Determination of YS/T 555.11 Methods for chemical analysis of molybdenum concentrate oil and moisture content of the total weight of the law
This section section 8.
"Analysis of tungsten concentrates - Determination of the amount of the" partial replacement of YS/T 555.8-2006 (formerly GB/T 15079.8-1994).
This portion of YS/T 555.8-2006 compared to the main changes are as follows.
--- Increasing the precision of the terms;
--- Text format has been modified, supplemented with quality assurance and control provisions.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This section is responsible for drafting unit. Jinduicheng Molybdenum Group Co., Ltd., China Nonferrous Metals Industry Institute of Standards and Metrology and Quality.
Participated in the drafting of this section. JCC (Dexing) New Mining Technology Development Co., Ltd., Luoyang Luanchuan Molybdenum Group Co. Shares
the company.
The main drafters of this section. Yang Dengfeng, Wang Zhongqi, Tian Wenhui, Wang Guoliang, Zhang Min.
This part certifier. Li Hongjun, Tian Yonghong.
This part of the standard replaces the previous editions are.
--- GB/T 15079.8-1994;
--- YS/T 555.8-2006.
Methods for chemical analysis of molybdenum concentrate
Determination of tungsten content of Thiocyanate spectrophotometric
1 Scope
This section provides the determination of tungsten content of molybdenum concentrate.
This section applies to the determination of tungsten content of molybdenum concentrate. Measurement range. 0.020% to 3.00%.
2 Method summary
Samples to fusion with sodium peroxide, leaching, in 8mol/L HCl medium tin dichloride and titanium trichloride restore the hexavalent tungsten pentavalent
Tungsten, potassium thiocyanate and four phenylarsonic chloride hydrochloride and a yellow pentavalent tungsten ternary complex. Extracted with chloroform, spectrophotometer wave
Long measuring absorbance at 405nm.
3 Reagents
3.1 sodium peroxide.
3.2 titanium trichloride.
3.3 chloroform.
3.4 hydrochloride (ρ1.19g/mL).
3.5 hydrochloric acid solution (2 + 1).
3.6 ethanol solution (98 + 2).
3.7 four phenylarsonic chloride hydrochloride solution (10g/L).
3.8 tin dichloride solution (200g/L). Weigh 20g tin dichloride, dissolved in 100mL of hydrochloric acid solution (3.5) in.
3.9 solution of potassium thiocyanate (150g/L).
3.10 HCl bath. in 100mL of hydrochloric acid solution (3.5) was added 1mL solution of potassium thiocyanate (3.9), 1mL solution of tin dichloride
(3.8), and mix. The time is now equipped with.
3.11 Tungsten standard stock solution. Weigh 0.1260g pre-bake at 105 ℃ and cooled in a desiccator to room temperature 1h tungsten trioxide (C
Tungsten oxide mass fraction of greater than or equal to 99.9%) in the 250mL beaker, add 40mL of sodium hydroxide solution (100g/L), slightly hot finish to make it
Totally dissolved, and cooled. Moved into 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 100μg tungsten. Store in a plastic
Feeding bottle.
3.12 Tungsten standard solution. Pipette 20.00mL tungsten standard stock solution (3.11) in 100mL volumetric flask, dilute to the mark with water, mix
uniform. This solution 1mL containing 20μg tungsten. Store in plastic bottle.
4 Instrument
Spectrophotometer.
5 Sample
Specimens shall be pre-stripped oil and moisture, particle size less than 0.090mm. After the sample should be 100 ℃ ~ 105 ℃ baking 1h, dry place
Dryer to cool to room temperature.
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