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GB/T 8208-2007 English PDF

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Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8208-2007 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.

US$159.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 8208-2007: Determination of gallium in coal
Status: Valid

GB/T 8208: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 8208-2007	159	Add to Cart	3 days	Determination of gallium in coal	Valid
GB/T 8208-1987	199	Add to Cart	2 days	Determination of gallium in coals	Obsolete

Similar standards

GB/T 16659 GB/T 9143 SN/T 4763

Basic data

Standard ID: GB/T 8208-2007 (GB/T8208-2007)
Description (Translated English): Determination of gallium in coal
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D22
Classification of International Standard: 73.040
Word Count Estimation: 6,669
Date of Issue: 2007-11-01
Date of Implementation: 2008-06-01
Older Standard (superseded by this standard): GB/T 8208-1987
Regulation (derived from): China National Standard Approval Announcement2007 No.12 (Total No.112)
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 molten alkali Jia coal-extraction and separation-Rhodamine B spectrophotometric acid melting-extraction and separation-Rhodamine B spectrophotometric method for feed, reagent materials, equipment, test procedures, results and methods of presentation precision and so on. This standard applies to lignite, bituminous coal and anthracite, measuring range (1 ~ 100) ��g/g arbitration analysis should be used alkali fusion-extraction and separation-Rhodamine B spectrophotometric method.

GB/T 8208-2007: Determination of gallium in coal

---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.
Determination of gallium in coal ICS 73.040 D22 National Standards of People's Republic of China Replacing GB/T 8208-1987 Determination of gallium in coal Posted 2007-11-01 2008-06-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 8208-1987 "Determination of gallium in coal." This standard compared with GB/T 8208-1987, the main changes are as follows. --- Delete the original standard visual colorimetry (1987 version 3.4); --- According to GB/T 1.1-2000 "Standardization Guide Part 1. Standard structure and write rules" and GB/T 483-2007 "Standard Test Method for Analysis of Coal General Provisions" revised standard written format, units of measure and symbols. The standard proposed by China Coal Industry Association. This standard by the National Standardization Technical Committee of Coal. This standard was drafted. CCRI coal analysis laboratory, Coalfield Geology Institute. The main drafters of this standard. Yang Huayu. This standard replaces the standards previously issued as follows. --- GB/T 8208-1987. Determination of gallium in coal

1 Scope

This standard specifies the base molten gallium in coal - Extraction Separation - Rhodamine B spectrophotometric acid and molten - The extraction - Rhodamine B Spectrophotometric method summary, reagent materials, equipment, test procedures, results are expressed and precision of the method and the like. This standard applies to lignite, bituminous coal and anthracite, the measurement range (1 ~ 100) μg/g. Arbitration analysis should be used alkali fusion - The extraction - Rhodamine B spectrophotometric method.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Analysis Method GB/T 212 coal (GB/T 212-2001, eqv ISO 11722.1999, eqv ISO 1171.1997, eqv ISO 562.1998) GB/T 483 coal analysis test methods - General provisions

3 Method summary

Coal ash after molten alkali, hydrochloric acid, evaporated to dryness and dehydration silicic acid, or sulfuric acid, hydrochloric acid, hydrofluoric acid mixture exploded. The melt Or decomposition with 6mol/L hydrochloric acid dissolved in a solution of titanium trichloride eliminate the influence of interfering elements, added to a solution of rhodamine B with chlorine gallate Forming a colored complex with benzene - ether extract, and then measured using a spectrophotometer.

4 Reagents and materials

4.1 Water. deionized water or equivalent purity distilled water. 4.2 sulfuric acid solution. volume ratio of 1 + 1, 1 volume of sulfuric acid (GB/T 625) was slowly added to 1 volume of water, and mix. 4.3 hydrochloric acid solution. about 6mol/L, 1 volume of hydrochloric acid (GB/T 622) was added to 1 volume of water, and mix. 4.4 hydrofluoric acid (GB/T 620). the relative density of 1.15. 4.5 Sodium hydroxide (GB/T 622). 4.6 ethanol (GB/T 679). 95%. 4.7 titanium trichloride (HG3122) solution. mass fraction of 15.0% to 20.0%. 4.8 Rhodamine B solution. 5g/L. Weigh 0.5g Rhodamine B was dissolved in 100mL solution of hydrochloric acid (4.3) in. 4.9 gallium stock standard solution. 100μg/mL. Weigh 0.1344g spectroscopically pure gallium oxide in 200mL flask was added a solution of hydrochloric acid (4.3) 20mL ~ 30mL, heated to End Totally dissolved. After cooling the solution into the 1L flask, the flask was washed with hydrochloric acid solution, lotion incorporated into the flask. Diluted hydrochloric acid solution To the mark, shake spare. NOTE. gallium stock standard solution can also be used commercially available certified reference materials. 4.10 Ga intermediate standard solution. 10μg/mL. Imbibe gallium stock standard solution (4.9) 10mL to 100mL volumetric flask, dilute to the mark, shake spare. 4.11 gallium working standard solution. 1μg/mL. Imbibe gallium intermediate standard solution 10mL to 100mL volumetric flask, dilute to the mark, shake spare. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 8208-2007_English be delivered?

Answer: Upon your order, we will start to translate GB/T 8208-2007_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 8208-2007_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 8208-2007_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 8208-2007?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8208-2007 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.