GB/T 22662.5-2008Chemical analysis methods of potassium fluotitanate - Part 5: Determiantion of calcium content - Flame atomic absorption spectrometric method (English PDF)
氟钛酸钾化学分析方法 第5部分：钙含量的测定 火焰原子吸收光谱法
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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 22662.5-2008 is the English-translated version of 氟钛酸钾化学分析方法 第5部分：钙含量的测定 火焰原子吸收光谱法.
GB/T 22662.5-2008 is the Chinese standard "Chemical analysis methods of potassium fluotitanate - Part 5: Determiantion of calcium content - Flame atomic absorption spectrometric method".
Its scope clause reads: This section GB/T 22662 specifies the method for the determination of fluorine content of calcium and potassium titanate. This section applies to the determination of fluorine content of calcium and potassium titanate. Measuring range. <=0.5%. Its clauses include method summary; reagents; sample.
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Document preview — GB/T 22662.5-2008
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 Method summary
- 4 Reagents
- 6 Sample
1 Scope
This section GB/T 22662 specifies the method for the determination of fluorine content of calcium and potassium titanate.
This section applies to the determination of fluorine content of calcium and potassium titanate. Measuring range. <=0.5%.
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
Sample with nitric acid, perchloric acid decomposition, the pH was adjusted with ammonia, separating titanium, in a 1% hydrochloric acid medium, lanthanum chloride as release agents, in
Atomic absorption spectrometer at a wavelength of 422.7nm, air - acetylene flame measured calcium content.
4 Reagents
4.1 perchloric acid
rho1.67g/mL.
4.2 HCl
1 + 1.
Nitrate 4.3. rho1.42g/mL.
Ammonia 4.4. 1 + 1.
4.5 Methyl red indicator
0.4g/L.
4.6 lanthanum chloride solution
100g/L.
Weigh 25.00g of lanthanum chloride heptahydrate in a beaker, add 150mL water, dissolved by heating and then diluted to 250mL flask, shake, spare.
4.7 Calcium standard stock solution
Weigh accurately 1.2486g pre-drying at 110 °C and cooled in the dryer baseline calcium carbonate placed
250mL beaker, covered with a watch glass, was added 50mL of water, add 10mL of hydrochloric acid (4.2) micro heat, until the reaction is complete, cool, moved
500mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 1.0000mg calcium.
4.8 Calcium standard solution
Pipette 25.00mL calcium standard stock solution (4.7) in 500mL volumetric flask, dilute to the mark, mix,
This solution 1mL containing 0.05mg calcium.
5. Apparatus
5.1 platinum dish
diameter 80mm, high 35mm.
5.2
Atomic absorption spectrometer, with a calcium hollow cathode lamp.
6 Sample
The specimen shall comply with GB/T 22662.1 requirements in 3.3.
......
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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