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GB/T 22662.4-2008 English PDF

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GB/T 22662.4-2008: Chemical analysis methods of potassium fluotitanate -- Part 4: Determination of silica content -- Molybdenum blue photometric method
Status: Valid
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GB/T 22662.4-2008English139 Add to Cart 3 days [Need to translate] Chemical analysis methods of potassium fluotitanate -- Part 4: Determination of silica content -- Molybdenum blue photometric method Valid GB/T 22662.4-2008

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Basic data

Standard ID GB/T 22662.4-2008 (GB/T22662.4-2008)
Description (Translated English) Chemical analysis methods of potassium fluotitanate -- Part 4: Determination of silica content -- Molybdenum blue photometric method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H61
Classification of International Standard 77.120.10
Word Count Estimation 6,695
Date of Issue 2008-12-29
Date of Implementation 2009-11-01
Quoted Standard GB/T 22662.1-2008
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 fluorine in the silicon content of potassium titanate. This section applies to the determination of fluorine in the silicon content of potassium titanate. Measuring range: �� 0. 50%.

GB/T 22662.4-2008: Chemical analysis methods of potassium fluotitanate -- Part 4: Determination of silica content -- Molybdenum blue photometric method


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Chemical analysis methods of potassium fluotitanate Part 4. Determination of silica content Molybdenum blue photometric method. ICS 77.120.10 H61 National Standards of People's Republic of China Potassium titanate fluorine chemical analysis Determination of silicon content. Part 4 Molybdenum blue spectrophotometric method 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 22662 "potassium titanate fluorine chemical analysis method" is divided into nine 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 fluorine potassium titanate ammonium ferric sulfate volumetric method; --- Part 4. Determination of silicon content - Molybdenum blue spectrophotometric method; --- Part 5. Determination of calcium content by flame atomic absorption spectrometry; --- Part 6. Determination of iron content by flame atomic absorption spectrometry; --- Part 7. Determination of lead content by flame atomic absorption spectrometry; --- Part 8. Determination of the chlorine content of mercuric nitrate volumetric method; --- Part 9. Determination of phosphorus pentoxide content - Molybdenum blue spectrophotometric method. This is Part 4 GB/T 22662 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 drafted. Hunan Nonferrous fluorine chemical limited liability company. Participated in the drafting of this section. Fluoride Chemicals Co., Ltd., Zhengzhou Research Institute, Aluminum Corporation of China, Hengyang City State Friends Chemical Technology Co., Ltd. The main drafters of this section. Li Zhijian, Zhu Liang, Liao Zhihui, Shi Xiuhua, Wang Hui, BU Law See Feng Jingdong, Liu Zhihong Huang Ju in particular, Liu Min. Potassium titanate fluorine chemical analysis Determination of silicon content. Part 4 Molybdenum blue spectrophotometric method

1 Scope

This section GB/T 22662 specifies the method for determination of fluorine in silicon content of potassium titanate. This section applies to the determination of fluorine in silicon content of potassium titanate. Measuring range. ≤0.50%.

2 Normative references

The following documents contain provisions which, through reference GB/T 22662 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 22662.1-2008 fluorine potassium titanate chemical analysis methods - Part 1. Preparation and storage of test samples

3 Method summary

After the sample was dissolved in sulfuric acid, boric acid complex fluorine, ammonium molybdate, molybdenum silicon so as to form a yellow complex ions, to further increase the acidity of [H +] 0.8mol/L or more, reduction with ascorbic acid yellow silicon molybdenum complex ions having a higher sensitivity silicon molybdenum blue, to compare on a spectrophotometer Determination of color.

4 Reagents

Sulfuric acid 4.1. 1 + 7. 4.2 boric acid. 40g/L. 4.3 ammonium molybdate solution. 100g/L. 4.4 HCl. 1 + 1. 4.5 ascorbic acid solution. 25g/L. 4.6 silicon standard stock solution. Weigh 0.5000g finely pre-burning 1h at 1000 ℃, and cooled to room temperature in the dryer two Silicon oxide (99.9%), placed in a platinum crucible, 5g of anhydrous sodium carbonate was added thereto within a platinum spoon adequate mixing at a high temperature in the furnace 950 ℃ carefully melted (about 10min), then cool, water was added to the crucible, heated slowly to dissolve completely. Cooled solution was carefully transferred 1L volumetric flask, dilute to volume, and mix. Immediately poured into a polyethylene bottle. This solution 1mL containing 0.500mg silica. 4.7 Silicon standard solution. Pipette 50.0mL silica standard stock solution (4.6) in 500mL volumetric flask, dilute to the mark, Mix well. Immediately transferred to plastic bottles. This solution 1mL containing 0.050mg silica. The solution was formulated before use now. 4.8 fluorine potassium titanate substrate solution Weigh 0.625g excellent pure fluorine potassium titanate, after pulverized, placed in polyethylene 250mL volumetric flask, add 40 ℃ ~ 60 ℃ hot water 100mL, plus 9mL sulfuric acid (4.1), cap tightly, shake flask fluorine potassium titanate completely dissolved, boric acid was added 100mL (4.2), Diluted with water to volume, and mix.

5 instruments and equipment

Common laboratory instruments and equipment.

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