GB/T 13747.2-2019 in English
VALIDMethods for chemical analysis of zirconium and zirconium alloys—Part 2：Determination of iron content—1,10-phenanthroline spectrophotometry and inductively coupled plasma atomic emission spectrometry
- Issued on:2019-12-31
- Implemented on:2020-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$117.00
《GB/T 13747.2-2019锆及锆合金化学分析方法 第2部分：铁量的测定 1,10-二氮杂菲分光光度法和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
1. Standard Overview and Background
GB/T 13747.2—2019 "Chemical Analysis Methods for Zirconium and Zirconium Alloys Part 2: Determination of Iron Content" is a professional standard for the determination of iron content in zirconium and its alloys. This standard replaces the previous GB/T 13747.2—1992. The main improvements include expanding the determination range to $0.010\% \sim 0.40\%$, adding sample processing clauses, and introducing inductively coupled plasma atomic emission spectrometry (ICP-AES) as a supplementary method.
2. Interpretation of analytical methods
| Determination method | Principle | Scope of application | Precision |
|---|---|---|---|
| Spectrophotometry | The absorbance is measured at a specific wavelength using the complexation reaction between iron ions and 1,10-phenanthroline. | $0.010\% \sim 0.40\% | Repeatability limit: $0.004\% \sim 0.03\%; Reproducibility limit: $0.005\% \sim 0.03\% |
| Inductively coupled plasma atomic emission spectrometry | The iron element in the sample is excited by ICP technology, and its characteristic emission spectrum is determined. | $0.010\% \sim 0.40\% | Repeatability limit: $0.003\% \sim 0.03\%; Reproducibility limit: $0.006\% \sim 0.03\% |
3. Method comparison and selection
The two methods have their own advantages and disadvantages. Spectrophotometry is easy to operate and has low cost, but it requires high sample pretreatment; ICP-AES has high sensitivity and is suitable for complex matrix analysis, but the equipment is expensive and requires professional technicians.
Application Case
When a zirconium alloy manufacturer used spectrophotometry to determine the iron content, it was found that the results were closely related to the process parameters. By optimizing the acidity adjustment and heating time, the determination accuracy was significantly improved.
4. Implementation suggestions
- Choose an appropriate method according to the range of iron content in the sample.
- Ensure the purity of reagents and instrument calibration to avoid systematic errors.
- Strengthen laboratory staff training to improve operational standardization.
- Regularly verify the standard curve to ensure data reliability.
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