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GB/T 22660.5-2008 English PDF

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GB/T 22660.5-2008: Chemical analysis methods of lithium fluoride -- Part 5: Determination of calcium content -- Flame atomic absorption spectrometric method
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GB/T 22660.5-2008English139 Add to Cart 3 days [Need to translate] Chemical analysis methods of lithium fluoride -- Part 5: Determination of calcium content -- Flame atomic absorption spectrometric method Valid GB/T 22660.5-2008

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Basic data

Standard ID GB/T 22660.5-2008 (GB/T22660.5-2008)
Description (Translated English) Chemical analysis methods of lithium fluoride -- Part 5: Determination of calcium content -- Flame atomic absorption spectrometric method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H60
Classification of International Standard 77.120
Word Count Estimation 6,655
Date of Issue 2008-12-29
Date of Implementation 2009-11-01
Quoted Standard GB/T 22660.1-2008
Regulation (derived from) National Standard Approval Announcement 2008 No.23 (Total No.136)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the method for the determination of lithium fluoride in calcium content. This section applies to the determination of lithium fluoride, calcium content. Measuring range: �� 0. 50%.

GB/T 22660.5-2008: Chemical analysis methods of lithium fluoride -- Part 5: Determination of calcium content -- Flame atomic absorption spectrometric method


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Chemical analysis methods of lithium fluoride Part 5. Determiantion of calcium content Flame atomic absorption spectrometric method ICS 77.120 H60 National Standards of People's Republic of China Methods for chemical analysis of lithium fluoride Part 5. Determination of calcium content Flame Atomic Absorption Spectrometry Posted 2008-12-29 2009-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 22660 "Methods for chemical analysis of lithium fluoride" is divided into eight sections. --- Part 1. Preparation and storage of test samples; --- Part 2. Determination of the weight of water in the wet method; --- Part 3. Determination of distillation of fluorine content - thorium nitrate volumetric method; --- Part 4. Determination of magnesium by flame atomic absorption spectrometry; --- Part 5. Determination of calcium content by flame atomic absorption spectrometry; --- Part 6. Determination of silicon dioxide content - Molybdenum blue spectrophotometric method; --- Part 7. Determination of iron oxide content phenanthroline spectrophotometry; --- Part 8. Determination of sulfate content of barium sulfate gravimetric method. This is Part 5 GB/T 22660 of. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This section is responsible for drafting unit. Fluoride Chemicals Co., Ltd., China Nonferrous Metals Industry Standards and Metrology Institute for Quality. Participated in the drafting of this section. Hunan Nonferrous fluorine chemical limited liability company, Aluminum Corporation of China Zhengzhou Research Institute. The main drafters of this section. Han Shijun, Li Yongqiang, Xue Xu Jin, Vicky division, Xu army, BU Law See Zhu Liang, Li Zhijian, even Chen Xi, Lan Wen Hui. Methods for chemical analysis of lithium fluoride Part 5. Determination of calcium content Flame Atomic Absorption Spectrometry

1 Scope

This section GB/T 22660 specifies the method for determination of lithium fluoride in calcium content. This section applies to the determination of lithium fluoride content of calcium. Measuring range. ≤0.50%.

2 Normative references

The following documents contain provisions which, through reference GB/T 22660 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revised edition are not adapted to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated references, the latest edition of this adaptation section. GB/T 22660.1-2008 Chemical analysis methods of lithium fluoride - Part 1. Sample Preparation and Storage

3 Method summary

Sample with perchloric catch fluorine, heated to high acid smokes do, dissolved in hydrochloric acid and water, in the presence of lanthanum nitrate, atomic absorption spectrometer wave Long 422.7nm at the air - acetylene flame measured calcium content.

4 Reagents

4.1 perchloric acid (ρ1.67g/mL). 4.2 hydrochloric acid (1 + 1) pure class distinctions. 4.3 lithium solution (7.5mg/mL). Weigh accurately 6.5628g a purity of 99.9% LiOH · H2O, constant volume of water in 500mL capacity Flask. 4.4 lanthanum nitrate solution (200g/L). Weigh accurately 100gLa (NO3) 3 · H2O, constant volume of water in 500mL flask. 4.5 Calcium standard stock solution. Weigh accurately 1.2486g pre-drying at 110 ℃ and cooled in the dryer baseline calcium carbonate placed 250mL beaker, covered with a watch glass, was added 50mL of water, add 10mL of hydrochloric acid (4.2) micro heat, until the reaction is complete, cool, moved 500mL volumetric flask, dilute with water to volume, and mix. 1mL solution containing calcium ions 1.0000mg. 4.6 Calcium standard solution. Pipette calcium standard stock solution (4.5) 10mL placed in 250mL volumetric flask, dilute to volume, mix, then the solution Solution concentration. 40μg/mL.

5 instruments and equipment

5.1 platinum dish. diameter 80mm, high 35mm. 5.2 Atomic absorption spectrometer, with a calcium hollow cathode lamp. Under optimum working conditions, who can be used to achieve the following indicators. --- Characteristic concentration. in the measurement of the sample matrix was consistent with the characteristic concentration of calcium should not exceed 0.24μg/mL. --- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed the average absorbance of 1.0% With the lowest concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum 0.5% concentration of the standard average absorbance.

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