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SN/T 3014-2011 English PDF

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SN/T 3014-2011: Determination of fluorine and chlorine contents in chrome ores for import and export. Ion selective electrode method
Status: Valid
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SN/T 3014-2011English239 Add to Cart 3 days [Need to translate] Determination of fluorine and chlorine contents in chrome ores for import and export. Ion selective electrode method Valid SN/T 3014-2011

PDF similar to SN/T 3014-2011


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Basic data

Standard ID SN/T 3014-2011 (SN/T3014-2011)
Description (Translated English) Determination of fluorine and chlorine contents in chrome ores for import and export. Ion selective electrode method
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard D41
Classification of International Standard 73.060.99
Word Count Estimation 9,949
Date of Issue 2011-09-09
Date of Implementation 2012-04-01
Quoted Standard GB/T 6682; GB/T 6730.1; GB/T 12806; GB/T 12808; SN 0066
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 ion-selective electrode method for the determination of chromium ore export method of fluorine and chlorine. This standard applies to imports of chrome ore in fluorine and chlorine. Measuring range (mass fraction): Fluoride: 0. 020% to 0. 20%, Cl

SN/T 3014-2011: Determination of fluorine and chlorine contents in chrome ores for import and export. Ion selective electrode method


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Determination of fluorine and chlorine contents in chrome ores for import and export.Ion selective electrode method People's Republic of China Entry-Exit Inspection and Quarantine Standards Determination of chrome ore import and export of fluorine and chlorine Ion Selective Electrode 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

Accordance with the standards GB/T 1.1-2009. Drafting Rules "Standardization Guide Part 1 standard structure and preparation of" given. Please note that some of the content of this document may involve patents. Distribution of this document Institutions do not assume the responsibility to identify these patents. The standard by the China Certification and Accreditation Regulatory Commission. This standard was drafted. People's Republic of China Liaoning Entry Inspection and Quarantine Bureau, People's Republic of China Guangdong Entry-Exit Inspection and Quarantine Bureau. The main drafters of this standard. of Interferon Zeng Ze Lin Xiaomei, pay more hatred, Liu Ran, Wang Zhangwen, Niedong Rui, Fu Yao, Zhong Zhiguang. This standard is the first release of the entry-exit inspection and quarantine industry standards. Determination of chrome ore import and export of fluorine and chlorine Ion Selective Electrode 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 national regulations.

1 Scope

This standard specifies the ion selective electrode method for the determination of chromium ore import and export of fluorine and chlorine method. This standard applies to the determination of chrome ore import and export of fluorine and chlorine. Measurement range (mass fraction). 0.020% to 0.20% fluorine, Chloro 0.020% to 0.40%.

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. Laboratory use specifications and test methods GB/T 6682 Analysis GB/T 6730.1 Method for analysis of chemical analysis of iron pre-dried sample preparation GB/T 12806 Laboratory glassware single marking flask GB/T 12808 Laboratory glassware single marking pipette SN 0066 chrome ore imports bulk sampling and sample preparation method

3 Determination of fluorine content

3.1 Method summary Sample sodium peroxide in a nickel crucible and melted, dissolved in water and a small amount of dilute nitric acid, volume, dry filter. Citric acid was added to the filtrate Solution, the test solution with a nitric acid solution to adjust the pH value 6.5 ± 0.3, and fluoride ion selective electrode measured directly potentiometric method. 3.2 Reagents Unless otherwise indicated, the reagents used were of analytical grade, water as a secondary water or equivalent purity water GB/T 6682 regulations. 3.2.1 sodium peroxide. WARNING. Flammable sodium peroxide, the operation should isolate the source of fire, avoid wiping with a dry cotton. 3.2.2 Sodium hydroxide. pure class distinctions. 3.2.3 sodium hydroxide solution (20g/L). 3.2.4 nitrate (ρ1.42g/mL). 3.2.5 nitric acid (11). 3.2.6 Citric acid. pure class distinctions. 3.2.7 citric acid solution (1mol/L). Weigh 192.1g citric acid (3.2.6) was dissolved in 800mL of water and transferred to 1L volumetric flask, Dilute with water to volume, and mix. 3.2.8 fluoro standard stock solution (1000μg/mL). Weigh 2.216g pre-dried at 105 ℃ sodium fluoride reference reagents dissolved in water

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