GB/T 18114.7-2010 English PDF

US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 18114.7-2010: Chemical analysis methods of rare earth concentrates -- Part 7: Determination of iron oxide content -- Potassium dichromate titration
Status: Valid

GB/T 18114.7: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 18114.7-2010	139	Add to Cart	3 days	Chemical analysis methods of rare earth concentrates -- Part 7: Determination of iron oxide content -- Potassium dichromate titration	Valid
GB/T 18114.7-2000	199	Add to Cart	2 days	Methode for chemical analysis of monazite concentrates. Determination of iron oxide content	Obsolete

Similar standards

GB/T 18882.1   GB/T 18115.2   GB/T 18882.2   GB/T 18114.3   GB/T 18114.8   GB/T 18114.11   

Basic data

Standard ID: GB/T 18114.7-2010 (GB/T18114.7-2010)
Description (Translated English): Chemical analysis methods of rare earth concentrates -- Part 7: Determination of iron oxide content -- Potassium dichromate titration
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Word Count Estimation: 6,642
Date of Issue: 1/14/2011
Date of Implementation: 11/1/2011
Older Standard (superseded by this standard): GB/T 18114.7-2000
Regulation (derived from): Announcement of Newly Approved National Standards No. 2 of 2011
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 iron oxide content of rare earth concentrates. This Standard is applicable to the determination of iron oxide content of rare earth concentrates, the measurement range of 0. 50% to 10. 0%.

GB/T 18114.7-2010: Chemical analysis methods of rare earth concentrates -- Part 7: Determination of iron oxide content -- Potassium dichromate titration

---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.
Chemical analysis methods of rare earth concentrates Part 7. Determination of iron oxide content Potassium dichromate titration ICS 77.120.99 H14 National Standards of People's Republic of China Replacing GB/T 18114.7-2000 Methods for chemical analysis of rare earth concentrates Part 7. Determination of iron oxide content Dichromate method Part 7. Determinationofironoxidecontent- Issued on. 2011-11-01 2011-01-14 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. This is Part 7. This part is GB/T 18114.7-2000 "Methods for chemical analysis of monazite concentrates - Determination of iron oxide content," the amendment. This section compared with the GB/T 18114.7-2000, have the following main changes. --- Measured by the range of 0.50% to 5.00 percent to 0.50% to 10.0%; --- Sample was adjusted to the melting time from 40min 25min; --- The filtrate was adjusted with hydrochloric acid to dissolve the alkali separated directly after the funnel was filtered off and the filter paper together into the original beaker, add The precipitate was dissolved into boiling hydrochloric acid, filtered while hot; --- Made with tin dichloride is used as a reducing agent to adjust tin dichloride - titanium trichloride as reducing agent; --- Increasing the precision of the terms; --- Increased quality assurance and control provisions. 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. This section was drafted by the Beijing Nonferrous Metal Research Institute. This part of Guangdong Zhujiang Rare Earth Co., Ltd., Ganzhou Qiandong Rare Earth Group Co., Ltd. participated in the drafting. The main drafters of this section. Liu Pengyu, Bing. The drafters of some of the participants. Liang Zhijie, Denghan Qin Yao Hung Nan, Chen Jie, Zhu Ni, REID sea. This part of the standard replaces the previous editions are. --- GB/T 18114.7-2000. Methods for chemical analysis of rare earth concentrates Part 7. Determination of iron oxide content Dichromate method

1 Scope

GB/T 18114 provisions of this part of the determination of iron oxide content of rare earth concentrates. This section applies to the determination of rare earth concentrates of iron oxide content, a measurement range of 0.50% to 10.0%.

2 principle of the method

After the sample by alkali melting, flooding, filtered to remove most of the coexisting elements; the filtrate was acidified with hydrochloric acid, the first with a large amount of iron tin dichloride (Ⅲ) reduction of iron (Ⅱ), and then sodium tungstate as an indicator, with titanium trichloride remaining Fe (Ⅲ) reduction, further reduction of tungstate to generate Tungsten blue, then a solution of potassium dichromate to the disappearance of the blue. Sulfuric acid mixed media, diphenylamine sulfonate as indicator with dichromate.

3 Reagents and materials

3.1 sodium hydroxide. 3.2 sodium peroxide. 3.3 potassium dichromate (reference). 3.4 titanium trichloride 150g/L ~ 200g/L (or commercially available). 3.5 hydrochloride (11). 3.6 NaOH wash (10g/L). 3.7 HCl wash (298). 3.8 tin dichloride solution. Weigh 5g tin dichloride, was added 10mL of hydrochloric acid (3.5), heated to dissolve, dilute to 100mL. The time is now equipped with. 3.9 sodium tungstate solution (250g/L). 3.10 titanium trichloride solution (2080), the time is now equipped with. 3.11 sulfuric acid, phosphoric acid mixed solution. constant stirring, 150mL to 700mL of water was slowly added sulfuric acid (ρ1.84g/mL) and 150mL phosphate (ρ1.69g/mL). 3.12 ferrous ammonium sulfate solution (approximately 0.1mol/L). 3.13 potassium dichromate standard titration solution. Weigh 0.4390g by 150 ℃ drying 1h baseline potassium dichromate (3.3) in the 100mL beaker The amount of water was added to dissolve the clear, transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution of iron titration factor (F) is 0.5000g/L. 3.14 diphenylamine sulfonate solution (5g/L).

4 Sample

The sample size should be 4.1 to grind through the 0.074mm sieve. 4.2 The sample was 105 ℃ ~ 110 ℃ drying 2h, placed in a desiccator, cooled to room temperature. Step 5 Analysis 5.1 Sample Table 1. Weigh the sample (4), accurate to 0.0001g. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 18114.7-2010_English be delivered?

Answer: Upon your order, we will start to translate GB/T 18114.7-2010_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 18114.7-2010_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 18114.7-2010_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+ countries

Question 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 Sales@ChineseStandard.net. 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.

Question 5: Should I purchase the latest version GB/T 18114.7-2010?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 18114.7-2010 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.