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SN/T 3012-2011 English PDF

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US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 3012-2011: Determination of tungsten trioxide in tungsten ores. X-ray fluorescence spectrom
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 3012-2011	189	Add to Cart	3 days	Determination of tungsten trioxide in tungsten ores. X-ray fluorescence spectrom	Valid

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Basic data

Standard ID: SN/T 3012-2011 (SN/T3012-2011)
Description (Translated English): Determination of tungsten trioxide in tungsten ores. X-ray fluorescence spectrom
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: D43
Classification of International Standard: 73.060.99
Word Count Estimation: 7,775
Date of Issue: 2011-09-09
Date of Implementation: 2012-04-01
Quoted Standard: GB/T 4414; GB/T 6379.2; GB/T 6682; GB/T 16597
Regulation (derived from): National Quality Inspection (2011) 492; industry standard filing Notice 2012 No. 4 (No. 148 overall)
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the wavelength dispersive X-ray fluorescence spectrometry tungsten tungsten trioxide content determination. This standard applies to tungsten, also applies to other tungsten ore of tungsten trioxide content. Measuring range (mass fraction): 17% to 70%.

SN/T 3012-2011: Determination of tungsten trioxide in tungsten ores. X-ray fluorescence spectrom

---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 tungsten trioxide in tungsten ores.X-ray fluorescence spectrom People's Republic of China Entry-Exit Inspection and Quarantine Standards Determination in Tungsten trioxide Content X-ray fluorescence spectrometry Issued on. 2011-09-09 2012-04-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard is in accordance with GB/T 1.1-2009. Rules "Standardization Guide Part 1 standard structure and drafting" given Drafted. This standard is proposed and managed by the China Certification and Accreditation Regulatory Commission. This standard was drafted. Xiamen, People's Republic of China Exit Inspection and Quarantine, Xiamen Tungsten Co., Ltd. The main drafters of this standard. Busch force, Dong Qing wood, heron Cai Yan, Wang Honghui, love Ye Shu, Wei Liying, Wang Caiyun. This is the first issue of inspection and quarantine industry standards. Determination in Tungsten trioxide Content X-ray fluorescence spectrometry Warning. Use of this standard shall have a person experiences regular laboratory work. This standard does not point out all possible security issues. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant state laws and regulations.

1 Scope

This standard specifies the method for the determination of tungsten concentrates - Determination of tungsten trioxide (WO3) content using wavelength dispersive X-ray fluorescence spectrometry. This standard applies to tungsten ore concentrates, also applicable to the determination of other tungsten ores WO3 content measurement range (mass fraction). 17% 70%.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 4414 Packaging tungsten concentrates sampling and sample preparation method GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat Of the basic methods of reproduction (GB/T 6379.2-2004, ISO 5275-2.1994, IDT) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) GB/T 16597 metallurgical product analysis X- ray fluorescence spectrometry General

3 Method summary

With sodium tetraborate and lithium tetraborate (63.35 weight ratio) was used as a flux, lithium nitrate as the oxidizing agent, lithium bromide as a release agent, in 1200 ℃ molten sample sheet prepared by spectroscopically pure WO3 preparation of calibration standards to Lα Lα line of tungsten and tantalum fluorescent emission intensity ratio Ordinate value, WO3 concentration as abscissa calibration curve, calculate the amount of analyte.

4 Reagents and materials

Unless otherwise stated, use only approved analytical reagent purity and above. Water is in line with two water GB/T 6682 regulations. 4.1 mixed flux [m (Na2B4O7) .m (Li2B4O7) = 65.35] (X-ray fluorescence dedicated reagent). at least 550 ℃ burning 4h, placed in a desiccator and stored. 4.2 lithium bromide (LiBr). at 105 ℃ drying 1h. 4.3 lithium bromide solution (400mg/mL). Weigh 200g ± 0.001g lithium bromide (4.2), was dissolved in 400mL of water, diluted to 500mL. 4.4 lithium nitrate (LiNO3). at 105 ℃ drying 1h. 4.5 lithium nitrate solution (220mg/mL). Weigh 0.001g 110g ± lithium nitrate (4.4), was dissolved in 200mL water and dilute to 500mL. 4.6 tungsten trioxide (WO3). pure spectrum at 800 ℃ burning 2h. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of SN/T 3012-2011_English be delivered?

Answer: Upon your order, we will start to translate SN/T 3012-2011_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 SN/T 3012-2011_English with my colleagues?

Answer: Yes. The purchased PDF of SN/T 3012-2011_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.