|
US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 26019-2010: Methods for chemical analysis of high impurity tungsten mineral -- Determination of tungsten trioxide content -- Twice separation and igniting gravimetric method
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 26019-2010 | English | 189 |
Add to Cart
|
3 days [Need to translate]
|
Methods for chemical analysis of high impurity tungsten mineral -- Determination of tungsten trioxide content -- Twice separation and igniting gravimetric method
| Valid |
GB/T 26019-2010
|
PDF similar to GB/T 26019-2010
Basic data | Standard ID | GB/T 26019-2010 (GB/T26019-2010) | | Description (Translated English) | Methods for chemical analysis of high impurity tungsten mineral -- Determination of tungsten trioxide content -- Twice separation and igniting gravimetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H63 | | Classification of International Standard | 77.120.99 | | Word Count Estimation | 8,898 | | Date of Issue | 1/10/2011 | | Date of Implementation | 10/1/2011 | | Regulation (derived from) | Announcement of Newly Approved National Standards 2011 No. (No. 166 overall) 1 | | 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 determination of high impurity tungsten ore of tungsten trioxide content. This Standard is applicable to the phosphorus content of less than 2%, titanium content of less than 1%, 2% tungsten ore Determination of tungsten trioxide content is less than the amount of tin. Tungsten trioxide measurement range: 20% or more. | GB/T 26019-2010: Methods for chemical analysis of high impurity tungsten mineral -- Determination of tungsten trioxide content -- Twice separation and igniting gravimetric method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methods for chemical analysis of high impurity tungsten mineral.Determination of tungsten trioxide content.Twice separation and igniting gravimetric method
ICS 77.120.99
H63
National Standards of People's Republic of China
High Impurity Tungsten Chemical Analysis Method
Determination of tungsten trioxide content
Secondary separation and burning weight method
2011-01-10 released
2011-10-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
This standard by the National Nonferrous Metals Standardization Technical Committee (SAC/TC23) centralized.
The drafting unit of this standard. Chenzhou Diamond Tungsten Products Co., Ltd., Xiamen Tungsten Industry Co., Ltd., Ganzhou Institute of Nonferrous Metals, Lake
Nan Chenzhou Shizhuyuan Nonferrous Metals Co., Ltd., Luoyang Luanchuan Molybdenum Group Co., Ltd.
The main drafters of this standard. Du Fangcai, Zhang Yuanxia, Tang Yihui, Zhu Guirong, Wang Caiyun, Kuang Jing, Pan Jianzhong, Wang Zhoulin, Lei Yong, Cui Yajuan,
Zhang Chunling.
High Impurity Tungsten Chemical Analysis Method
Determination of tungsten trioxide content
Secondary separation and burning weight method
1 Scope
This standard specifies the determination of tungsten trioxide in high-quality tungsten.
This standard is applicable to the determination of the amount of tungsten oxide in tungsten ore with a phosphorus content of less than 2%, a titanium content of less than 1% and a tin content of less than 2%. three
Tungsten oxide measurement range. 20% or more.
2 method summary
Samples in the presence of a small amount of ammonium fluoride, hydrochloric acid, nitric acid, perchloric acid dissolved, concentrated to white smoke to get rid of excess fluoride and nitric acid
Roots, tungsten tung tung acid precipitation, filtration, separation with most of the coexisting elements, with ammonia dissolved tungstic acid, adding ferric nitrate and beryllium nitrate precipitation separation
His impurities, the filtrate by steaming, burning, to hydrofluoric acid to silicon, and then said after the amount of tungsten trioxide. The amount of tungsten trioxide in the residue was measured by spectrophotometry,
Correction results. When the molybdenum content is greater than 0.3%, the results need to be corrected.
3 reagent
Unless otherwise stated, the reagents used in this section are analytical reagents that conform to national standards or industry standards, and the water used is distilled water.
3.1 Sodium peroxide.
3.2 Ammonium fluoride.
3.3 Disodium EDTA (EDTA).
3.4 Hydrochloric acid (ρ1.19g/mL).
3.5 nitric acid (ρ1.42g/mL).
3.6 hydrofluoric acid (ρ1.15g/mL).
3.7 anhydrous ethanol.
3.8 ammonia (ρ0.90g/mL).
3.9 aqueous ammonia solution (1 1).
3.10 aqueous ammonia solution (1 4).
3.11 Ammonia-Ammonium Nitrate Mixture. Remove 40 mL of aqueous ammonia (3.9), add 450 mL of water, add 2 mL of nitric acid (3.5).
3.12 Sodium hydroxide solution (24 g/L).
3.13 Sodium hydroxide solution (100 g/L).
3.14 Sodium hydroxide solution (50 g/L).
3.15 perchloric acid (ρ1.67g/mL).
3.16 Perchloric acid wash solution (1.199).
3.17 ferric nitrate solution. Weigh 1g of pure iron powder, add 50mL nitric acid (3.5), dissolved in the electric furnace dissolved in water after dilution
1000mL.
3.18 beryllium nitrate solution. weighed 10g analysis of pure BeSO4 · 4H2O, add 400mL water dissolved, add 50mL ammonia (3.8), heating boiled
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 26019-2010_English be delivered?Answer: Upon your order, we will start to translate GB/T 26019-2010_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 26019-2010_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 26019-2010_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.
|