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GB/T 22661.9-2008: Chemical analysis methods of potassium fluoborate -- Part 9: Determination of chloride content -- Distillation mercury nitration volumetric method
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Chemical analysis methods of potassium fluoborate -- Part 9: Determination of chloride content -- Distillation mercury nitration volumetric method
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GB/T 22661.9-2008
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Basic data | Standard ID | GB/T 22661.9-2008 (GB/T22661.9-2008) | | Description (Translated English) | Chemical analysis methods of potassium fluoborate -- Part 9: Determination of chloride content -- Distillation mercury nitration volumetric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H61 | | Classification of International Standard | 77.120.10 | | Word Count Estimation | 5,531 | | Date of Issue | 2008-12-29 | | Date of Implementation | 2009-11-01 | | Quoted Standard | GB/T 22661.1-2008 | | 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 determination of boric acid and potassium chloride fluoride content. This section applies to the determination of boric acid and potassium chloride fluoride content. Measuring range: �� 0. 5%. | GB/T 22661.9-2008: Chemical analysis methods of potassium fluoborate -- Part 9: Determination of chloride content -- Distillation mercury nitration volumetric method
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Chemical analysis methods of potassium fluoborade Part 9. Determination of chloride content Distillation mercury nitration volumetric method
ICS 77.120.10
H61
National Standards of People's Republic of China
Chemical analysis methods of potassium fluoroborate
Part 9. Determination of chlorine content
Mercuric nitrate volumetric 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 is Part 9 GB/T 22661 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. Fluoride Chemicals Co., Ltd.
Participated in the drafting of this section. Hunan Nonferrous fluorine chemical limited liability company, Aluminum Corporation of China Zhengzhou Research Institute, Hengyang City
State Friends of Chemical Technology Co., Ltd.
The main drafters of this section. Xue Xu Jin, Shi Xiuhua, Li Yongqiang, Guoxian Hui, Xu army, Fan Liansheng, Zhu Liang, Li Zhijian, Shin Ji flowers,
Bai Xianghua, Liu Zhihong Huang Ju in particular, Liu Min.
Chemical analysis methods of potassium fluoroborate
Part 9. Determination of chlorine content
Mercuric nitrate volumetric method
1 Scope
This section GB/T 22661 specifies the method for determination of potassium fluoroborate in chlorine content.
This section applies to the determination of potassium fluoroborate in chlorine content. 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
In slightly acidic solution, the standard solution of mercury nitrate with strong ionization of chlorine ion is converted to weakly ionized mercuric chloride with hydrazine diphenylcarbazone
Indicator with an excess of Hg2 + purple generate complex to determine the end point.
4 Reagents
Nitrate 4.1. 1mol/L.
4.2 nitrate mercury standard titration solution. Ba [1/2Hg (NO3) 2] = 0.05mol/L.
4.2.1 preparation.
Accurately weigh 8.5650g mercuric nitrate [Hg (NO3) 2 · H2O, pure class distinctions], placed in 250mL beaker, add 50mL of nitric acid,
Dissolved until the solution is clear, if necessary, can be filtered and transferred to 1000mL volumetric flask, dilute with water to volume, and mix.
4.2.2 Calibration.
Pipette 5.00mL three standard sodium chloride solution (0.0500mol/L), were placed in 250mL flask, add water to 100mL,
2 drops of bromophenol blue indicator, nitric acid was added dropwise until the solution was yellow, and then 5 drops of excess, was added 1mL diphenylcarbazone hydrazide indicator nitrate
Mercury standard titration solution titration solution from yellow to purple is the end. Nitrate mercury standard titration solution volume parallel calibration consumed
Differential should not exceed 0.05mL, averaged. With calibration blank test.
4.3 diphenylcarbazone hydrazide indicator. 5g/L.
4.4 bromophenol blue indicator. 2g/L.
5. Apparatus
Commonly used laboratory instruments and equipment.
6 Sample
The specimen shall comply with GB/T 22661.1 requirements in 3.3.
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