Home Cart Quotation About-Us
www.ChineseStandard.net
SEARCH

GB/T 15249.2-2009 English PDF

Q: How long will the true-PDF of English version of GB/T 15249.2-2009 be delivered?

Upon your order, we will start to translate GB/T 15249.2-2009_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.

Q: Can I share the purchased PDF of GB/T 15249.2-2009_English with my colleagues?

Yes. The purchased PDF of GB/T 15249.2-2009_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Q: Does the price include tax/VAT?

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). Avoidance of Double Taxation Agreements (DTAs) between Singapore and 100+ Countries: https://www.iras.gov.sg/taxes/international-tax

Q: Do you accept my currency other than USD?

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.

Q: Should I purchase the latest version GB/T 15249.2-2009?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 15249.2-2009 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$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 15249.2-2009: Methods for chemical analysis of crude gold -- Part 2: Determination of silver content -- Fire assay gravimetric and EDTA titrimetric methods
Status: Valid

GB/T 15249.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 15249.2-2009	189	Add to Cart	3 days	Methods for chemical analysis of crude gold -- Part 2: Determination of silver content -- Fire assay gravimetric and EDTA titrimetric methods	Valid
GB/T 15249.2-1994	199	Add to Cart	2 days	Crude Gold-Determination of silver content-EDTA titrimetric method	Obsolete

Similar standards

GB/T 38744 GB/T 38783 GB/T 15076.3 GB/T 15249.4 GB/T 15249.5 GB/T 15249.3

Basic data

Standard ID: GB/T 15249.2-2009 (GB/T15249.2-2009)
Description (Translated English): Methods for chemical analysis of crude gold -- Part 2: Determination of silver content -- Fire assay gravimetric and EDTA titrimetric methods
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H15
Classification of International Standard: 77.120.70
Word Count Estimation: 8,848
Date of Issue: 2009-05-06
Date of Implementation: 2009-10-01
Older Standard (superseded by this standard): GB/T 15249.2-1994
Regulation (derived from): National Standard Approval Announcement 2009 No.6 (Total No.146)
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: Method 1: Scope fire assay gravimetric method for the determination of the amount of silver: GB/T 15249 requirements of this part of the determination of crude gold silver content. This section applies to crude gold (mine gold, metallurgical recovery of coarse gold products and gold) Determination of silver content. Determination of silver content range: 0. 50 %-40. 00%. When the sample contains affect the measurement accuracy of the fire assay gravimetric method of interfering elements (such as iridium, palladium, platinum, rhodium, ruthenium and osmium, etc.), this section will not apply. Method 2: Scope Determination of EDTA titration of silver content: GB/T 15249 provisions of this part of the determination of crude gold silver content. This section applies to crude gold (mine gold, metallurgical recovery of coarse gold products and gold) Determination of silver content. Determination of silver content of the mass fraction range: 0. 50 %-40. 00%.

GB/T 15249.2-2009: Methods for chemical analysis of crude gold -- Part 2: Determination of silver content -- Fire assay gravimetric and EDTA titrimetric methods

---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 crude gold Part 2. Determination of silver content Fire assay gravimetric and EDTA titrimetric methods ICS 77.120.70 H15 National Standards of People's Republic of China Replacing GB/T 15249.2-1994 Crude Gold Analysis Part 2. Determination of silver content Fire assay gravimetric and EDTA titration Posted 2009-05-06 2009-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 15249 "Crude Gold analysis method" is divided into the following five sections. --- Part 1. Determination of the amount of gold fire assay gravimetric method; --- Part 2. Determination of the amount of silver fire assay gravimetric and EDTA titration; --- Part 3. Determination of copper content iodometry; --- Part 4. Determination of lead content EDTA titration; --- Part 5. Determination of mercury content - Cold atomic absorption spectrometry. This section GB/T 15249 Part 2. This Part replaces GB/T 15249.2-1994 "Crude Gold analysis method EDTA titration method for the determination of silver content." This portion of the GB/T 15249.2-1994 compared to the main changes are as follows. --- On the basis of the content of the original standard adds content determination fire assay gravimetric method for silver content and the method of arbitration as a method; --- Text format was revised; increase the "Preface", as described in GB/T 15249 "Methods for chemical analysis of crude gold" composition Partial revision of the standard and background information; --- Remove the old version of "reference standard" clause, "the term" clause, and the "principle of the method" clause text was re-expressed; --- Increased clause "samples"; --- Remove the old version of "allowable difference" clause; --- Added "precision" clause, "quality assurance and control" clause. This section proposed by the People's Bank of China. This part of the National Standardization Technical Committee on Finance (SAC/TC180) centralized. This section is responsible for drafting the Shenyang Mint. This part by the Chengdu Banknote Printing Company, Changchun Gold Research Institute, Shanghai Mint, Beijing Mining Research Institute, Nanjing Mint participated in the drafting. The main drafters of this section. Wang Yu, Chen Jie, Chen Feifei, Wang Zisen, Linle Qin, Chu Ling Bao Long Shujie, Meng Bo, Zhu Muping, Dupei Yong, Zhuxiu Fen, Huang Minhua. This part of the standard replaces the previous editions are. --- GB/T 15249.2-1994. Crude Gold Analysis Part 2. Determination of silver content Fire assay gravimetric and EDTA titration Method 1 a fire assay gravimetric method for the determination of the amount of silver 1.1 Scope This section GB/T 15249 specifies the method for determination of crude gold silver content. This section applies to the determination of crude gold (gold mining, smelting and recycling crude metal products such as gold) silver content. Determination of the mass fraction range of silver. 0.50% - 40.00%. When a sample containing the influence of interference element fire assay gravimetric method for the measurement accuracy (such as iridium, palladium, platinum, rhodium, ruthenium and osmium), this section will not Be applicable. 1.2 Principle of the method Weigh a certain quality of crude gold samples, wrapped in lead foil is carried out at a high temperature molten ash blown state, lead and gold and silver and base metals are oxidized stars Away, said gold and silver have combined grain quality and the amount of gold fire assay sample were measured by subtraction calculations and measurement along with the synthesis of gold and silver standard after correction Calculate the mass fraction of silver. 1.3 Reagents and materials Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. 1.3.1 lead foil. pure lead (mass fraction of not less than 99.99%) processed into a length of about 51mm, a thickness of about 0.1mm square sheet. 1.3.2 Silver. the mass fraction of not less than 99.99%. 1.3.3 gold. the mass fraction of not less than 99.99%. 1.3.4 nitric acid (1 + 1). 1.3.5 nitric acid (1 + 2). 1.4 instruments and appliances 1.4.1 Box-type high-temperature furnace. 1.4.2 scales. a sense of the amount of 0.01mg. 1.4.3 cupel 1.4.3.1 ashes dish. animal ashes made from the ashes of the best sheep. The animal bones crushed into ashes after firing the following particle size 0.175mm Ashes powder, add 10% to 15% of the water pressing on the gray ash pan dish machine, natural drying after use. Ashes dish Dimensions. Diameter 30mm, high Of 23mm, an inner diameter of 26mm, the concave depth 10mm. 1.4.3.2 magnesia cupel. Calcined magnesia powder (particle size 0.147mm) and 525 Portland cement by mixing a small amount of water 85.15 Pressing, dry naturally after use. Magnesium oxide ash pan size. diameter 40mm, height 25mm, inner diameter of 30mm, the depth of the concave 15mm. 1.4.4 grind machine. small, rolled up to a thickness of 0.1mm. 1.5 Sample To avoid contamination of the sample surface, the heat can be used hydrochloric acid (1 + 1) soak 15min. Washed by the water after washing with alcohol or acetone twice, Drying in the oven at 105 ℃ ~ 110 ℃. 1.6 Analysis Steps 1.6.1 Gold, silver forecast given 1.6.1.1 Weigh 0.5g sample (1.5) in duplicate, to the nearest 0.00001g, wherein a lead foil packet (1.3.1) and the other based on the estimated ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 15249.2-2009_English be delivered?

Answer: Upon your order, we will start to translate GB/T 15249.2-2009_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 15249.2-2009_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 15249.2-2009_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 15249.2-2009?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 15249.2-2009 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.