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SN/T 3996-2014 English PDF

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US$159.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
SN/T 3996-2014: Determination of fluoride content in calcined magnesite - Ion selective electrode method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 3996-2014	159	Add to Cart	3 days	Determination of fluoride content in calcined magnesite - Ion selective electrode method	Valid

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Basic data

Standard ID: SN/T 3996-2014 (SN/T3996-2014)
Description (Translated English): Determination of fluoride content in calcined magnesite - Ion selective electrode method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: D52
Classification of International Standard: 73.080
Word Count Estimation: 6,618
Date of Issue: 12/1/2014
Date of Implementation: 5/1/2015
Quoted Standard: GB/T 6379.2; GB/T 6682
Regulation (derived from): State-Quality-Inspection-accreditation [2014] 614
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the ion selective electrode method for the determination of fluorine in magnesium light burning method. This standard applies to light burning magnesium fluoride (as F) content determination. Measurement range (mass fraction): 0.01

SN/T 3996-2014: Determination of fluoride content in calcined magnesite - Ion selective electrode 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.
(Light burning magnesium fluoride ion selective electrode determination) People's Republic of China Entry-Exit Inspection and Quarantine Standards Light burning magnesium fluoride by ion selective electrode method Issued on. 2014-11-19 2015-05-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Liaoning Province Exit Inspection and Quarantine. The main drafters of this standard. Zeng Ze, of Interferon Xu Jing, Wang Jian, Qiu pay more, Jiang Xiaoguang, Xie Yan, Lin Xiaomei. Light burning magnesium fluoride by ion selective electrode method

1 Scope

This standard specifies the ion selective electrode method for the determination of fluorine in magnesium light burning method. This standard applies to light burning magnesium fluoride (as F) content determination. Measurement range (mass fraction). 0.010% to 0.15%.

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 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 Laboratory use specifications and test methods GB/T 6682 Analysis

3 Method summary

Samples with hydrochloric acid under microwave decomposed, sodium citrate was added as a masking agent, at pH6 ~ pH6.5 conditions, fluorine ion selective Electrode measuring electrode, calomel electrode as the reference electrode measuring potential. The potential is measured by a standard solution the fluorine content in the sample is calculated.

4 Reagents

Unless otherwise indicated, the reagents used in the analysis were pure class distinctions. Test water should comply with a water GB/T 6682 regulations. 4.1 hydrochloric acid solution (11). 4.2 Sodium hydroxide solution (200g/L). Weigh 50g of sodium hydroxide dissolved in 250mL water, transferred to a plastic jug and set aside. 4.3 sodium citrate solution (1mol/L). 4.4 fluoro standard stock solution (1000mg/L). Weigh 2.2101g previously dried to constant weight at 105 ℃ ~ 110 ℃ sodium fluoride place 150mL beaker, add water to dissolve, transferred to a 1000mL volumetric flask, dilute to the mark, shake. Transferred to a dry plastic bottles The sealed. 4.5-fluoro standard solution (80mg/L). Pipette 80.00mL fluoro standard stock solution (4.4) into a 1000mL volumetric flask, diluted with water To the mark. Transferred to a dry plastic bottle sealed. 4.6 ethanol (AR). 4.7 Alizarin Red S indicator (1g/L). Weigh 0.1g Alizarin Red S dissolved in 100mL of 25% ethanol (4.6 ml). 4.8 magnesium matrix solution. Weigh 20.000g purity magnesium rods (99.99%) into a beaker, adding a small amount of water. Continuously added in small 280mL of hydrochloric acid solution (4.1). Be careful during the addition. Initially, a small amount of hydrochloric acid was added (4.1), to prevent violent reaction caused by darting, The reaction to be slowed down, and then continue adding a small amount of hydrochloric acid solution (4.1), until all is added. Cooled, transferred to 500mL volumetric flask, diluted with water Volume. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of SN/T 3996-2014_English be delivered?

Answer: Upon your order, we will start to translate SN/T 3996-2014_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 3996-2014_English with my colleagues?

Answer: Yes. The purchased PDF of SN/T 3996-2014_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.