GB/T 3884.16-2025Methods for chemical analysis of copper concentrates - Part 16: Determination of silicon dioxide content - Potassium fluosilicate titrimetric method and gravimetric method (English PDF)
铜精矿化学分析方法 第16部分：二氧化硅含量的测定 氟硅酸钾滴定法和重量法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 31, 2025
Implementation date
May 1, 2026
Scope
GB/T 3884.16-2025 is the English-translated version of 铜精矿化学分析方法 第16部分：二氧化硅含量的测定 氟硅酸钾滴定法和重量法.
GB/T 3884.16-2025 is the Chinese standard "Methods for chemical analysis of copper concentrates - Part 16: Determination of silicon dioxide content - Potassium fluosilicate titrimetric method and gravimetric method".
Its scope clause reads: This document describes methods for determining the silica content in copper concentrate and copper slag concentrate using potassium fluorosilicate titration and gravimetric methods.
This document applies to the determination of silica content in copper concentrate and copper slag concentrate. Method 1.Potassium fluorosilicate titration method - determination range.
(mass fraction). 0.50%~32.00%; Method 2 gravimetric method determination range (mass fraction). 0.50%~40.00%. Its clauses include terms and definitions.
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Document preview — GB/T 3884.16-2025
National Standard of the People's Republic of China
- ICS
- 77.120.30
- Classification
- H 13
- Replacing
- GB/T 3884.16-2014
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Method 1.Potassium fluorosilicate titration
1 Scope
This document describes methods for determining the silica content in copper concentrate and copper slag concentrate using potassium fluorosilicate titration and gravimetric methods.
This document applies to the determination of silica content in copper concentrate and copper slag concentrate. Method 1.Potassium fluorosilicate titration method - determination range.
(mass fraction). 0.50%~32.00%; Method 2 gravimetric method determination range (mass fraction). 0.50%~40.00%.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 6682 Specifications and test methods for water used in analytical laboratories
3 Terms and Definitions
This document does not contain any terms or definitions that need to be defined.
4 Method 1.Potassium fluorosilicate titration
4.1 Principle
The sample was fused with potassium hydroxide, leached with hot water, and acidified. Then, potassium chloride and hydrofluoric acid were added to a strongly acidic solution to convert the silicic acid into potassium fluorosilicate.
The precipitate is formed, filtered, washed to remove free acid, and then dissolved in boiling neutral water. The precipitate hydrolyzes to form hydrofluoric acid, which is then converted to bromothymol.
Using blue-phenol red as an indicator, titration is performed with a standard sodium hydroxide solution. The volume of sodium hydroxide solution consumed is used to calculate the carbon dioxide content.
Silicon content.
4.2 Reagents
Unless otherwise specified, only reagents confirmed to be of analytical grade shall be used in the analysis.
4.2.1
Water, conforming to GB/T 6682, Class II.
4.2.2
Potassium hydroxide.
4.2.5
Hydrochloric acid (rho=1.19g/mL).
4.2.6
Nitric acid (rho=1.42g/mL).
4.2.7
Hydrofluoric acid (rho=1.14g/mL).
4.2.8 Saturated potassium chloride-ethanol washing solution
Anhydrous ethanol and carbon dioxide-free water are mixed at a ratio of 1.1, and potassium chloride (4.2.4) is added until saturated. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.
Referenced standards
Normative references
Editions of GB/T 3884.16
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 3884.16-2025 | Methods for chemical analysis of copper concentrates - Part 16: Determination of silicon dioxide content - K2SiF6 titrimetric method and gravimetric method | current edition | Current |
| GB/T 3884.16-2014 | Methods for chemical analysis of copper concentrates -- Part 16: Determination of silicon dioxide content -- K2SiF6 titrimetric method and gravimetric method | previous edition | In force |
This page sells the current edition, GB/T 3884.16-2025. Earlier editions are listed for reference only.
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Related Standards
GB/T 6682-2008 — Water for analytical laboratory use - Specification and test methods
GB/T 3884.1-2025 — Methods for chemical analysis of copper concentrates - Part 1: Determination of copper content - Iodine titration method and electrogravimetric method
GB/T 3884.10-2012 — Methods for chemical analysis of copper concentrates -- Part 10: Determination of Antimony content -- Hydride generation atomic fluorescence spectrometry method
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