GB/T 4698.13-2017 in English
VALIDMethods for chemical analysis of titanium sponge, titanium and titanium alloys - Part 13: Determination of zirconium content - EDTA complexometric titration and inductively coupled plasma atomic emission spectrometry
- Issued on:2017-09-29
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 4698.13-2017海绵钛、钛及钛合金化学分析方法 第13部分：锆量的测定 EDTA络合滴定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
Interpretation of GB/T 4698.13—2017 National Standard of the People's Republic of China
This standard specifies the determination method of zirconium content in titanium sponge, titanium and titanium alloys, including EDTA complexometric titration and inductively coupled plasma atomic emission spectrometry (ICP-AES). This article will provide a comprehensive interpretation of the standard content and provide a professional comparative analysis.
1. Standard Background and Technical Evolution
| Version Information | Major Changes |
|---|---|
| GB/T 4698.13—2017 | Replaces GB/T 4698.13—1996. Major changes include: - Extends the determination range to 15% - Adds ICP-AES method - Updates precision requirements |
| GB/T 4698.13—1996 | Specifies the zirconium content determination method for the first time, with a range of 0.5%~12% |
2. Method 1: EDTA complexometric titration
EDTA complexometric titration is suitable for samples with high zirconium content, and the determination range is 0.5%~15%. The operation steps of this method are as follows:
- The sample is dissolved in hydrochloric acid, and hydroxylamine hydrochloride is added to eliminate iron interference.
- Use xylenol orange as an indicator and titrate in hydrochloric acid medium to the yellow end point.
- Boil and titrate twice to ensure the accuracy of the results.
3. Method 2: Inductively Coupled Plasma Atomic Emission Spectrometry
ICP-AES Spectrometry is suitable for samples with low zirconium content, with a determination range of 0.01%~15%. This method has the following advantages:
- No need for complex pre-treatment steps.
- Low detection limit, suitable for trace analysis.
- Multiple elements can be determined simultaneously.
4. Comparison of standard methods
| Comparison dimensions | EDTA complexometric titration | ICP-AES spectroscopy |
|---|---|---|
| Detection range | 0.5%~15% | 0.01%~15% |
| Sensitivity | Medium | High |
| Applicable scenarios | Preferred when the zirconium content is high | Microanalysis or complex samples |
5. Implementation suggestions
Choose the determination method according to actual needs:
- For samples with high zirconium content, EDTA complexometric titration is recommended.
- For trace analysis or complex samples, ICP-AES spectroscopy is preferred.
- Ensure the purity of reagents and instrument calibration to improve the accuracy of the determination.
6. Test report
A complete test report should include:
- Sample information
- Standards and methods used
- Analysis results and deviations
- Abnormal phenomena during the determination
- Test date
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