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SN/T 0951-2010 English PDF

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SN/T 0951-2010: Determination of tungsten trioxide content in ammonium paratungstate for import and export
Status: Valid

SN/T 0951: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
SN/T 0951-2010English139 Add to Cart 2 days [Need to translate] Determination of tungsten trioxide content in ammonium paratungstate for import and export Valid SN/T 0951-2010
SN/T 0951-2000English199 Add to Cart 2 days [Need to translate] Method for the determination of tungsten trioxide content in ammonium paratungstate for import export Obsolete SN/T 0951-2000

PDF similar to SN/T 0951-2010


Standard similar to SN/T 0951-2010

YS/T 1297   GB/T 1479.2   GB/T 1479.1   SN/T 0962   

Basic data

Standard ID SN/T 0951-2010 (SN/T0951-2010)
Description (Translated English) Determination of tungsten trioxide content in ammonium paratungstate for import and export
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard H16
Word Count Estimation 5,523
Date of Issue 2010-05-27
Date of Implementation 2010-12-01
Older Standard (superseded by this standard) SN/T 0951-2000
Quoted Standard GB/T 6682; GB/T 10116
Regulation (derived from) National Quality Inspection (2010) 290; industry standard filing Notice 2010 No. 10 (No. 130 overall)
Issuing agency(ies) General Administration of Customs
Summary This standard specifies the export APT tungsten trioxide content determination. This standard applies to tungsten trioxide content of 88. 5% over the APT tungsten trioxide content.

SN/T 0951-2010: Determination of tungsten trioxide content in ammonium paratungstate for import and export


---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 content in ammonium paratungstate for import and export People's Republic of China Entry-Exit Inspection and Quarantine Standards Instead of the SN/T 0951-2000 Importers ammonium paratungstate tungsten trioxide Determination of Issued on. 2010-05-27 2010-12-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

Instead of the standard SN/T 0951-2000 "Determination of ammonium paratungstate in the import and export of tungsten trioxide content." This standard compared with SN/T 0951-2000, the main changes are as follows. --- According to GB/T 1.1-2009 "Standardization Guide Part 1. Structure and rules are written standard" and GB/T 20001.4-2001 "Rules for drafting standards - Part 4. Chemical analysis methods" requirements for the structure of the original standard Modified. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard is drafted by. People's Republic of China Guangdong CIQ. The main drafters of this standard. Chen Wenjie, Lin Hongxiong, Liang Meiqiong, Lingju Qing, Huang Chin-feng, Fang Yongkang, Liu Sheng. Importers ammonium paratungstate tungsten trioxide Determination of

1 Scope

This standard specifies the method for the determination of ammonium paratungstate in the import and export of tungsten trioxide content. Determination of ammonium paratungstate tungsten trioxide content This standard applies to tungsten trioxide content of more than 88.5%.

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 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) GB/T 10116 paratungstate Test Method 3 3.1 Method summary Samples with ammonia dissolved by adding hydrochloric acid precipitated tungsten acid, hydrochloric acid was added to make the solution cinchonine acid precipitate completely, and with impurity stars From the precipitate was filtered, washed with hydrofluoric acid to remove silicon after burning After burning again, said the amount of tungsten trioxide. 3.2 Reagents and solutions Unless otherwise indicated, the reagents used were of analytical grade or secondary water GB/T 6682 provisions of the above specifications, test the water. Warning. the acid test solution is a highly corrosive solution, the operation should wear latex gloves 3.2.1 Hydrofluoric acid. ρ = 1.13g/mL. 3.2.2 hydrochloric acid solution. 11. 3.2.3 sulfuric acid solution. 9mol/L. 3.2.4 ammonia solution. mass fraction of 15%. 3.2.5 hydrochloric acid solution. 13. 3.2.6 cinchonine hydrochloride solution (100g/L). 10g called cinchonine dissolved in 100mL of hydrochloric acid solution (3.2.5), filtered spare. 3.2.7 hydrochloric acid cinchonine lotion (3g/L). Take 30mL cinchonine hydrochloride solution (3.2.6) and 30mL hydrochloric acid (3.2.2) and mix with water Diluted to 1000mL, shake spare. 3.2.8 ammonia solution. mass fraction of 1.5%. 3.3 Equipment 3.3.1 platinum crucible. 3.3.2 high-temperature furnace. 3.3.3 water bath. 3.3.4 Quantitative Slow filter paper. 11cm.

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