GB/T 18882.2-2017 in English
VALIDChemical analysis methods for mixed rare earth oxideof ion-absorpted type rare earth ore - Part 2: Determination of aluminum oxide content
- Issued on:2017-10-14
- Implemented on:2018-05-01
- File Format:PDF
- Delivery:Within 1 day
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《GB/T 18882.2-2017离子型稀土矿混合稀土氧化物化学分析方法 第2部分：三氧化二铝量的测定》由TC229（全国稀土标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
GB/T 18882.2—2017 Standard Interpretation
This part is the second part of GB/T 18882, which specifies the determination method of aluminum oxide content in ionic rare earth ores and mixed rare earth oxides. The standard mainly includes two methods: inductively coupled plasma atomic emission spectrometry (ICP-OES) and titration.
1. Background of Standard Revision
| Revision Content | Specific Content |
|---|---|
| Measurement Range Adjustment | Method 1: 0.10%~5.00%, Method 2: 4.00%~15.00% |
| Matrix Matching Optimization | Separation of rare earth by oxalic acid was changed to approximate matrix matching |
| Analysis Line Adjustment | The analysis line of aluminum (Al) was changed from 396.152nm to 237.312nm, and a new recommended analysis line of 167.617nm was added |
2. Comparison of Measurement Methods
| Determination method | Scope of application | Sensitivity | Operation complexity |
|---|---|---|---|
| ICP-OES | 0.10%~5.00% | High sensitivity, suitable for trace analysis | Medium complexity, requires professional equipment operation |
| Titration | 4.00%~15.00% | Suitable for high content determination | The operation steps are cumbersome and require strict control of conditions |
3. Implementation Suggestions
Equipment configuration recommendations:Laboratories should choose appropriate measurement methods based on their own needs. If samples with different content ranges need to be processed simultaneously, it is recommended to equip ICP-OES and titration equipment to meet comprehensive testing needs.
Quality control measures:Use standard samples to calibrate instruments regularly and record the calibration results. For key reagents such as EDTA solution and zinc sulfate standard solution, the preparation method should be strictly followed to ensure accuracy.
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