ASTM C169 Chemical Analysis Testing for Soda-Lime & Borosilicate Glass
ASTM C169 is used in the quantitative analysis of soda-lime and borosilicate glass. This test can determine the number of usual constituents present in them. It is utilized as referee and routine analysis of soda-lime silicate, soda-lime fluoride opal, and borosilicate glass. Values are expressed in SI units.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM C169 specifies standardized procedures for the chemical analysis of soda-lime and borosilicate glass compositions. It determines the concentration of major oxides such as silica, alkali oxides, and alkaline earth elements, which directly influence glass properties like durability, thermal expansion, and strength.
This method is essential for quality control and formulation verification in glass manufacturing. By providing accurate compositional data, ASTM C169 helps ensure consistency, optimize production processes, and maintain compliance with product specifications for various industrial and technical glass applications.
Scope, Applications, and Benefits
Scope
ASTM C169 outlines procedures for determining the chemical composition of soda-lime and borosilicate glass using classical and instrumental analytical techniques to ensure reliable and reproducible results.
- Applicable to soda-lime and borosilicate glass compositions
- Determines major and minor oxide constituents
- Covers wet chemical and instrumental analysis methods
- Includes sample preparation and dissolution procedures
- Ensures accuracy and repeatability in analysis
- Supports quality control and material certification
Applications
- Glass manufacturing quality control
- Raw material and batch composition verification
- Research and development of glass formulations
- Optical and specialty glass production
- Industrial and laboratory glass analysis
- Compliance with product specifications
Benefits
- Provides accurate chemical composition data
- Ensures consistency in glass production
- Detects impurities and compositional variations
- Supports process optimization and control
- Enables compliance with industry standards
- Assists in research and product development
Test Process
Sample Preparation
Crush and finely grind the glass sample to obtain a homogeneous powder.
1Dissolution Stage
Dissolve the sample using suitable acids or flux fusion methods.
2Chemical Analysis
Analyze dissolved sample using titration or instrumental techniques.
3Result Calculation
Calculate oxide composition percentages based on analytical results.
4Technical Specifications
| Parameter | Details |
|---|---|
| Material Type | Soda-lime and borosilicate glass |
| Sample Preparation | Crushing and fine grinding |
| Dissolution Method | Acid digestion or fusion |
| Elements Measured | SiO₂, Na₂O, CaO, B₂O₃, Al₂O₃, etc. |
| Analytical Techniques | Titration, ICP-OES, AAS |
| Output Data | Percentage composition of oxides |
Instrumentation Used for Testing
- Analytical balance
- Furnace for fusion
- Acid digestion setup
- ICP-OES or ICP-MS analyzer
- Atomic absorption spectrometer (AAS)
- Volumetric titration apparatus
Results and Deliverables
- Oxide composition percentages of glass
- Identification of impurities and trace elements
- Compliance with formulation specifications
- Quality verification of glass materials
- Comparative compositional analysis
- Detailed analytical report with calculations
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Infinita Lab is a trusted USA-based testing laboratory offering ASTM C169 testing services across an extensive network of accredited facilities across the USA.
Infinita Lab is built to serve the full spectrum of modern testing needs—across industries, materials, and methodologies. Our advanced equipment and expert professionals deliver highly accurate and prompt test results, helping businesses achieve quality compliance and product reliability.
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Frequently Asked Questions
ASTM C169 is used to determine the chemical composition of soda-lime and borosilicate glass by analyzing major and minor oxides. It helps manufacturers ensure material consistency, verify formulations, and maintain compliance with product specifications and quality standards.
Chemical composition directly affects glass properties such as strength, durability, thermal expansion, and chemical resistance. Accurate analysis ensures the material meets required performance criteria and prevents defects in manufacturing and final applications.
It ensures consistent composition, detects impurities, and verifies compliance with specifications, helping maintain product quality.
Boron oxide improves thermal resistance and chemical durability, making borosilicate glass suitable for high-temperature and laboratory applications.
It helps manufacturers control composition, improve processes, reduce defects, and ensure high-quality glass products that meet industry standards and customer requirements.
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