GB/T 33503-2017 in English
VALIDAnalytical method of the chemical composition in the glass containing lead
- Issued on:2017-03-03
- Implemented on:2018-01-01
- File Format:PDF
- Delivery:Via email within 5 business days
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《GB/T 33503-2017含铅玻璃化学成分分析方法》由TC447（全国工业玻璃和特种玻璃标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
Analysis of the core content of the standard
| Test items | Method | Scope of application | Key equipment |
|---|---|---|---|
| Silicon dioxide | Potassium fluorosilicate volumetric method | >5% | Nickel crucible, UV spectrophotometer |
| Lead oxide | EDTA titration | >5% | Platinum dish, ICP-OES |
| 27 kinds of oxides | ICP-OES | ≤10% | Inductively coupled plasma spectrometer |
Key technical points
1. Sample pretreatment specifications
Crushing particle size: The sample needs to be ground to <0.08mm and dried at 105-110℃ for 2h before testing to ensure the representativeness of the sample.
2. Comparison of key detection methods
Potassium fluorosilicate volumetric method (SiO₂)
The process is potassium hydroxide melting → acid leaching → potassium fluorosilicate precipitation → hot water hydrolysis titration, with a precision of 0.25% (>10% content).
ICP-OES multi-element analysis
Recommended wavelengths:
- Pb 220.353nm/182.143nm
- Ba 455.403nm
- Zn 213.857nm
Standard implementation recommendations
Laboratory configuration requirements
- Protective equipment: Anti-corrosion gloves and goggles are required for hydrofluoric acid operation
- Environmental control: Constant temperature and humidity laboratory (temperature 23±2℃, humidity ≤60%)
Quality control measures
- Insert standard material (SRM 620) for verification in each batch
- Relative deviation of parallel samples ≤ requirements of Appendix B
- Regularly calibrate the position of the matrix tube of ICP-OES
Standard Evolution Analysis
Compared with the 2005 version, the 2017 version has the following major improvements:
- New ICP-OES method to replace the traditional chemical method
- Expand the detection elements to 27 oxides
- Precision requirements increased by 30% (such as PbO determination)
Sample only — not a preview of GB/T 33503-2017
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