YS/T 715.5-2009Methods for chemical analysis of selenium dioxide. Part 5: Determination of water insoluble content. Gravimetric analysis (English PDF)
二氧化硒化学分析方法 第5部分：水不溶物含量的测定 重量法
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Issued by
Ministry of Industry and Information Technology
Level / Type
National · Recommended
Issue date
December 4, 2009
Implementation date
June 1, 2010
Scope
YS/T 715.5-2009 is the English-translated version of 二氧化硒化学分析方法 第5部分：水不溶物含量的测定 重量法.
YS/T 715.5-2009 — YS/T of the provisions of section 715 of the method for the determination of selenium dioxide in water-insoluble content. This section applies to the determination of selenium dioxide in water-insoluble content.
Determination of water insoluble matter when the present standard, according to the sample size and specifications of the value of the counter Operators insolubles resulting aqueous mass is not less than 1mg, its measurement range. 0.002% to 0.06%.
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Document preview — YS/T 715.5-2009
National Standard of the People's Republic of China
- ICS
- 77.120.10
- Classification
- H 12
Issued by: Ministry of Industry and Information Technology
Contents
- Foreword
- 1 Scope
- 2 Method summary
- 3 Reagents and Instruments
- 4 Sample
- 5 Step, Analysis
- 5.1 Sample
- 5.2 Determination
Foreword
YS/T 715 "selenium dioxide chemical analysis method" is divided into five parts.
--- Part 1. Determination of the amount of selenium dioxide, sodium thiosulfate titration;
--- Part 2. arsenic, cadmium, iron, mercury, lead content - Inductively coupled plasma atomic emission spectrometry;
--- Part 3. Determination of chlorine content of silver chloride turbidimetric method;
--- Part 4. residue on ignition - Gravimetric method;
--- Part 5. water-insoluble content - Gravimetric method.
This section YS/T Part 5 715.
The non-ferrous metal part by the National Standardization Technical Committee and centralized.
This section is responsible for drafting unit. Tongling Nonferrous Metals Group Holdings Limited.
This section is drafted. JCC is responsible.
Participated in the drafting of this section. Tongling Nonferrous Metals Group Holdings Co., Ltd., Guangzhou Nonferrous Metal Research Institute.
1 Scope
YS/T of the provisions of section 715 of the method for the determination of selenium dioxide in water-insoluble content.
This section applies to the determination of selenium dioxide in water-insoluble content. Determination of water insoluble matter when the present standard, according to the sample size and specifications of the value of the counter Operators insolubles resulting aqueous mass is not less than 1mg, its measurement range. 0.002% to 0.06%.
2 Method summary
After the sample is dissolved in water, filtered, washed with, dried and weighed.
3 Reagents and Instruments
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
3.1 sand core glass crucible. a volume of 30mL, pore size of 5µm ~ 15µm.
3.2 vacuum suction filtration apparatus.
3.3 dryer.
3.4 electric oven. control the temperature at 105 °C ~ 110 °C.
3.5 Analysis of balance. a sense of the amount of 0.1mg.
4 Sample
Sample required uniform, dry and seal intact.
5 Step, Analysis
5.1 Sample
In dry conditions, quickly weighed about 50g sample, accurate to 0.001g.
5.2 Determination
Independent secondary measurement averaged.
5.2.1 The sample (5.1) in 250mL beaker, 100mL of distilled water was added, dissolved by heating, cooled to room temperature.
5.2.2 has been used in 105 °C ~ 110 °C constant weight of the sand core glass crucible was filtered, and the filtrate was washed with distilled water to pH 6 so far.
5.2.3 The sand core glass crucible placed in an electric oven at a temperature of 105 °C ~ 110 °C dried to constant weight.
Calculation results of the analysis of 6 Water-insoluble content of the quality of water insoluble fraction of water-insoluble substance and its value is expressed in%, according to formula (1).
100 (1)
Where.
The obtained results are shown to fourth place after the decimal point.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 3 pages — is available in the English PDF.
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Related Standards
YS/T 715.1-2009 — Methods for chemical analysis of selenium dioxide. Part 1: Determination of selenium dioxide content. Sodium thiosulfate titration
YS/T 715.2-2009 — Methods for chemical analysis of selenium dioxide. Part 2: Determination of arsenic, cadmium, iron, mercury, lead contents. Inductively coupled plasma-atomic emission spectrometry
YS/T 715.3-2009 — Methods for chemical analysis of selenium dioxide. Part 3: Determination of chlorine content. Silver chlorine turbidimetrion method
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YS/T 715.5-2009
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