GB/T 22661.2-2008 English PDF

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GB/T 22661.2-2008: Chemical analysis methods of potassium fluoborate -- Part 2: Determination of moisture content -- Gravimetric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22661.2-2008	149	Add to Cart	2 days	Chemical analysis methods of potassium fluoborate -- Part 2: Determination of moisture content -- Gravimetric method	Valid

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Basic data

Standard ID: GB/T 22661.2-2008 (GB/T22661.2-2008)
Description (Translated English): Chemical analysis methods of potassium fluoborate -- Part 2: Determination of moisture content -- Gravimetric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H61
Classification of International Standard: 77.120.10
Word Count Estimation: 5,582
Date of Issue: 2008-12-29
Date of Implementation: 2009-11-01
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 potassium fluoroborate wet water storage. This section applies to the determination of potassium fluoroborate wet water storage. Measuring range: �� 0. 5%.

GB/T 22661.2-2008: Chemical analysis methods of potassium fluoborate -- Part 2: Determination of moisture content -- Gravimetric method

---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.
Chemical analysis methods of potassium fluoborade Part 2. Determination of moisture content Gravimetric method. ICS 77.120.10 H61 National Standards of People's Republic of China Chemical analysis methods of potassium fluoroborate Part 2. Determination of the weight of water in the wet 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 22661 "potassium fluoroborate chemical analysis method" is divided into 10 parts. --- Part 1. Preparation and storage of test samples; --- Part 2. Determination of the weight of water in the wet method; --- Part 3. Determination of potassium fluoride boric acid sodium hydroxide 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 content - Molybdenum blue spectrophotometric method; --- Part 7. Determination of sodium content by flame atomic absorption spectrometry; --- Part 8. Determination of the free boronic acid sodium volumetric method; --- Part 9. Determination of the chlorine content of mercuric nitrate volumetric method; --- Part 10. Determination of phosphorus pentoxide content - Molybdenum blue spectrophotometric method. This section GB/T 22661 Part 2. 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, Wang Hui, Li Yongqiang, Zhao Xiaochun, Feng Jingdong, Liu Zhihong Huang Ju in particular, Liu Min. Chemical analysis methods of potassium fluoroborate Part 2. Determination of the weight of water in the wet method

1 Scope

This section GB/T 22661 specifies the method for determination of potassium fluoroborate hygroscopic water. This section applies to the determination of potassium fluoroborate hygroscopic water. Measuring range. ≤0.5%.

2 Normative references

The following documents contain provisions which, through reference GB/T 22661 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 22661.1-2008 Chemical analysis methods of potassium fluoroborate Part 1. Preparation and storage of test samples

3 Method summary

The sample was dried at 110 ℃ and measuring the amount of loss.

4 Instrument

4.1 weighing bottle. diameter 45mm, flat type. 4.2 electric oven. the temperature can be controlled at 110 ℃ ± 5 ℃.

5 Sample

The specimen shall comply with GB/T 22661.1-2008 in 3.2 requirements. Step 6 Analysis 6.1 Sample Weigh 2.5g of the original sample (5), to the nearest 0.001g, denoted m1 0. 6.2 Determination of the number of Independent of the two measurements, the mean value. 6.3 Determination 6.3.1 advance at 110 ℃ ± 5 ℃ in an electric oven (4.2) in the drying 2h, and cooled in a desiccator sample (6.1) into the weighing bottle (4.1), the lid was weighed (accurate to 0.001g), referred to as m1 2. 6.3.2 Place the sample weighing bottle (6.3.1) where the temperature was adjusted to 110 ℃ ± 5 ℃ in an electric oven, the lid of the bottle rack on top do not cover strict. At the same time placed in an oven with a diameter slightly larger than the weighing bottle table dish, bake 2h, remove the cap put on the table dish, and place all dry Dry vessel. After cooling, remove the sheet pan, cap tightly, and weighed (accurate to 0.001g), referred to as m1. 7. Calculation of analytical results According to formula (1) to calculate the mass fraction of water in the wet (%). (Moisture intrudes) m1 m1 = m1 2- 0 × 100 (1) ......

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