《GB/T 13747.20-2017锆及锆合金化学分析方法 第20部分：铪量的测定 电感耦合等离子体原子发射光谱法》由TC243（全国有色金属标准化技术委员会）归口，TC243SC3（全国有色金属标准化技术委员会稀有金属分会）执行，主管部门为中国有色金属工业协会。
Introduction
Interpretation of the standard for the determination of hafnium content in zirconium and zirconium alloys
1. Background and significance of the standard
GB/T 13747.20—2017 is the national standard of the People's Republic of China, which specifies the method for the determination of hafnium content in zirconium and zirconium alloys.
| Standard Dimensions | 1992 Version Requirements | 2017 Version Improvements |
| Measurement Range | $0.0050\%$ | Standard Dimensions | 1992 Version Requirements | 2017 Version Improvements | | Measurement Range | $0.30\%$ Laboratory conditions: - ICP-AES instrument with hydrofluoric acid resistant nebulizer system.
- Ensure that all reagents are analytical grade or grade II water.
- Operators must be professionally trained and familiar with the use of equipment and standard procedures.
Laboratory conditions: - ICP-AES instrument with hydrofluoric acid resistant nebulizer system.
- Ensure that all reagents are analytical grade or grade II water.
- Operators must be professionally trained and familiar with the use of equipment and standard procedures.
-
Quality Control Measures: - Regularly calibrate the instrument and verify the linearity of the working curve ($r \geqslant 0.999$).
- Perform blank tests and repeatability tests to ensure the accuracy of the results.
- Retain all original data and calculation records for future reference.
Application Case: - For zirconium alloy samples, dissolve and prepare the test solution according to the standard process and perform ICP-AES determination. Calculate the hafnium content according to the working curve method to ensure that the results meet the accuracy requirements.
- In actual production, it is recommended to regularly sample products to ensure that the hafnium content meets the technical specifications.
Sample only — not a preview of GB/T 13747.20-2017
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