GB/T 4333.1-2019Ferrosilicon - Determination of silicon content - Perchloric acid dehydration gravimetric method and potassium fluosilicate volumetric method (English PDF)
硅铁 硅含量的测定 高氯酸脱水重量法和氟硅酸钾容量法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 30, 2019
Implementation date
July 1, 2020
Scope
GB/T 4333.1-2019 is the English-translated version of 硅铁 硅含量的测定 高氯酸脱水重量法和氟硅酸钾容量法.
GB/T 4333.1-2019 is the Chinese standard "Ferrosilicon - Determination of silicon content - Perchloric acid dehydration gravimetric method and potassium fluosilicate volumetric method".
Its scope clause reads: This part of GB/T 4333 specifies the determination of silicon in ferrosilicon using the perchloric acid dehydration weight method and the potassium fluorosilicate volumetric method.
This section applies to the determination of silicon content in ferrosilicon. Measuring range (mass fraction). 30.00%~98.00%. Its clauses include method 1 perchloric acid dehydration weight method.
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Document preview — GB/T 4333.1-2019
National Standard of the People's Republic of China
- ICS
- 77.100
- Classification
- H 11
- Replacing
- GB 4333.1-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Method 1 Perchloric acid dehydration weight method
- 3.1 Principle
- 3.2 Reagents
1 Scope
This part of GB/T 4333 specifies the determination of silicon in ferrosilicon using the perchloric acid dehydration weight method and the potassium fluorosilicate volumetric method.
This section applies to the determination of silicon content in ferrosilicon. Measuring range (mass fraction). 30.00%~98.00%.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Preparation and preparation of GB/T 4010 ferroalloy chemical analysis sample
GB/T 6379.1 Accuracy of measurement methods and results (accuracy and precision) Part 1. General and definition
GB/T 6379.2 Accuracy of measurement methods and results (accuracy and precision) Part 2. Determination of standard method of measurement
Basic method of sex and reproducibility
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values
GB/T 12807 laboratory glass instrument indexing pipette
3 Method 1 Perchloric acid dehydration weight method
3.1 Principle
The sample is melted with a sodium carbonate-sodium peroxide mixed flux to convert silicon into a silicate, acidified with hydrochloric acid, and smoked with perchloric acid to cause silicic acid.
Dehydration. After washing and washing, the precipitate is burned to a constant amount at 1050 ° C ~ 1100 ° C, hydrofluoric acid is used to volatilize silicon into silicon tetrafluoride, and then
The mass fraction of silicon is calculated by burning to a constant amount and the difference in mass before and after treatment with hydrofluoric acid.
3.2 Reagents
In the analysis, unless otherwise stated, only the reagents confirmed as analytically pure are used, and the test water is the third and third grades specified in GB/T 6682.
Distilled water, deionized water or water of equivalent purity.
3.2.1 Sodium carbonate-sodium peroxide mixed flux
Mix 1 part of anhydrous sodium carbonate and 2 parts of sodium peroxide.
3.2.2
Hydrofluoric acid, rho = 1.15g/mL.
3.2.3
Perchloric acid, rho = 1.67 g/mL.
3.2.4
Hydrochloric acid, rho = 1.19 g/mL.
3.2.5
Ammonia water, rho = 0.9g/mL.
3.2.6
Hydrochloric acid, 1 1.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Editions of GB/T 4333.1
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4333.1-2019 | Ferrosilicon - Determination of silicon content - Perchloric acid dehydration gravimetric method and potassium fluosilicate volumetric method | current edition | Current |
| GB 4333.1-1984 | Ferrosilicon - Determination of silicon content - Perchloric acid dehydration gravimetric method and potassium fluosilicate volumetric method | previous edition | Superseded |
This page sells the current edition, GB/T 4333.1-2019. Earlier editions are listed for reference only.
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