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SN/T 2092-2008 English PDF

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SN/T 2092-2008: Determination of selenium content in antimony ingot for import and export.Atomic fluorescence spectrometric method
Status: Valid
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SN/T 2092-2008English169 Add to Cart 3 days [Need to translate] Determination of selenium content in antimony ingot for import and export.Atomic fluorescence spectrometric method Valid SN/T 2092-2008

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Basic data

Standard ID SN/T 2092-2008 (SN/T2092-2008)
Description (Translated English) Determination of selenium content in antimony ingot for import and export.Atomic fluorescence spectrometric method
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard H25
Classification of International Standard 77.040
Word Count Estimation 6,651
Date of Issue 2008-04-29
Date of Implementation 2008-11-01
Regulation (derived from) National-accreditation-Science [2012] 57
Issuing agency(ies) General Administration of Customs
Summary This standard specifies the import and export of antimony ingot method for determination of selenium. This standard applies to imports and antimony selenium content. Measuring range: 0. 00010% to 0. 010%

SN/T 2092-2008: Determination of selenium content in antimony ingot for import and export.Atomic fluorescence spectrometric method


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Determination of selenium content in antimony ingot for import and export.Atomic fluorescence spectrometric method Exit inspection and quarantine industry standard book People's Republic of China Determination of antimony content of selenium in the import and export of Atomic Fluorescence Spectrometry Posted 2008-04-29 2008-11-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

Appendix A of this standard is an informative annex. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard by the People's Republic of China Guangdong CIQ is responsible for drafting. The main drafters of this standard. Zhongmei Fang, Guo Seoul, hair autumn Mei, Li Guangming, yellow submarine Ji, Gu Changsheng, Zhang. This standard is the first release of the entry-exit inspection and quarantine industry standards. Determination of antimony content of selenium in the import and export of Atomic Fluorescence Spectrometry

1 Scope

This standard specifies the method for determination of import and export antimony content of selenium. This standard applies to the determination of Importers and antimony content of selenium. Measurement range. 0.0001% to 0.010%.

2 Method summary

A sample was calcined agent, covering trapping agent, calcined at 800 ℃, extracted with water and dispensing serum, in hydrochloric acid medium, reducing the hexavalent selenium Tetravalent selenium, potassium borohydride reduction of the tetravalent selenium hydrogen selenide, determination of selenium by atomic fluorescence spectrometer.

3 Reagents and materials

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or water of equivalent purity. 3.1 potassium hydroxide. 3.2 magnesium oxide. 3.3 anhydrous sodium carbonate. 3.4 Toner (or activated carbon). 3.5 potassium borohydride. 3.6 hydrochloric acid (ρ1.19g/mL, pure class distinctions). 3.7 nitrate (ρ1.42g/mL, pure class distinctions). 3.8 scavenger. 4 parts of anhydrous sodium carbonate was mixed with 1 part of magnesium oxide, ground, 105 ℃ drying 2h. 3.9 solution of potassium borohydride (15g/L). Weigh 15g potassium borohydride (3.5), was dissolved in 1000mL potassium hydroxide solution (2g/L), and mixed uniform. The time is now equipped with. 3.10 Selenium standard stock solution (100μg/mL). Weigh 0.1000g of pure selenium (purity ≥99.95%), placed in 100mL beaker, add 5mL nitric acid, heating the water bath and evaporated to dryness, dissolved in water and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. 3.11 selenium standard solution (1.00μg/mL). Pipette 1.00mL stock selenium standard solution (3.10), placed in 100mL flask with water Dilute to volume, and mix. The time is now equipped with. 3.12 argon (purity ≥99.99%).

4 Instrument

4.1 atomic fluorescence spectrometer, with a special selenium hollow cathode lamp. 4.2 muffle furnace. Control temperature 800 ℃ ± 20 ℃.

5 Sample

All samples should be ground to a standard sieve through 0.13mm, at 105 ℃ ~ 110 ℃ baking 1h, placed in a desiccator, cool to room temperature. Step 6 Analysis 6.1 Sample Table 1. Weigh the sample to the nearest 0.0001g.

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