GB/T 22662.9-2008Chemical analysis methods of potassium fluotitanate - Part 9: Determination of phosphoruo content - Molybdenum blue photometric method (English PDF)
氟钛酸钾化学分析方法 第9部分：五氧化二磷含量的测定 钼蓝分光光度法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 29, 2008
Implementation date
November 1, 2009
Scope
GB/T 22662.9-2008 is the English-translated version of 氟钛酸钾化学分析方法 第9部分：五氧化二磷含量的测定 钼蓝分光光度法.
GB/T 22662.9-2008 is the Chinese standard "Chemical analysis methods of potassium fluotitanate - Part 9: Determination of phosphoruo content - Molybdenum blue photometric method".
Its scope clause reads: This section GB/T 22662 specifies the method for determination of fluorine potassium titanate pentoxide content. This section applies to the determination of fluorine potassium titanate pentoxide content.
Measuring range. <=0.050%. Its clauses include principle of the method; reagents; instruments and equipment.
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Document preview — GB/T 22662.9-2008
National Standard of the People's Republic of China
- ICS
- 77.120.10
- Classification
- H 61
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 PRINCIPLE OF THE METHOD
- 4 Reagents
- 5 instruments and equipment
1 Scope
This section GB/T 22662 specifies the method for determination of fluorine potassium titanate pentoxide content.
This section applies to the determination of fluorine potassium titanate pentoxide content. Measuring range. <=0.050%.
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 PRINCIPLE OF THE METHOD
After the sample was dissolved in sulfuric acid, boric acid complex fluorine added ammonium molybdate in pH<=0.3 when phosphorus phosphorus molybdenum heteropoly acid formed by the reduction of
After phosphorus molybdenum blue at 800nm wavelength spectrophotometer measured absorbance.
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
pentoxide standard stock solution.
Weigh 0.1917g potassium dihydrogen phosphate (reference reagents, at 110 °C drying 2h, cool in a desiccator), was dissolved with water and transferred to
1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 0.100mgP2O5.
4.7
pentoxide standard solution.
Weigh 10.00mL phosphorus standard stock solution (4.6), in 100mL volumetric flask, dilute with water to volume, and mix. This solution 1mL
Containing 0.0100mgP2O5. The solution was formulated before use now.
4.8 fluorine potassium titanate substrate solution
Weigh 0.625g excellent pure fluorine potassium titanate, the ground, the polyethylene placed in 250mL flask, add 100mL40 °C ~
60 °C water added 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.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 22662.8-2008 — Chemical analysis methods of potassium fluotitanate - Part 8: Determination of chloride content - Distillation-mercury nitration volumetric method
GB/T 22662.7-2008 — Chemical analysis methods of potassium fluotitanate - Part 7: Determiantion of lead content - Flame atomic absorption spectrometric method
GB/T 22662.6-2008 — Chemical analysis methods of potassium fluotitanate - Part 6: Determination of iron - Flame atomic absorption spectrometric method
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