GB/T 1819.10-2017 in English
VALIDMethods for chemical analysis of tin concentrates―Part 10:Determination of sulfur content―High frequency combustion with infrared absorption method and potassium iodate titrimetric method
- 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 1819.10-2017锡精矿化学分析方法 第10部分：硫量的测定 高频感应炉燃烧红外吸收法和碘酸钾滴定法》由TC243（全国有色金属标准化技术委员会）归口，TC243SC2（全国有色金属标准化技术委员会重金属分会）执行，主管部门为中国有色金属工业协会。
Introduction
GB/T 1819.10—2017 Standard Overview
This standard is Part 10 of the "Chemical Analysis Methods for Tin Concentrates", which mainly specifies the determination method for sulfur content in tin concentrates. Compared with the old version of the standard (GB/T 1819.10—2004), this revision optimizes the determination range, reagent requirements and precision indicators.
Comparison of two determination methods
| Method name | Scope of application | Main features | Precision requirements |
|---|---|---|---|
| High frequency induction furnace combustion infrared absorption method | Determination range: 0.050%~0.50% | High sensitivity, high degree of automation, suitable for low sulfur content determination. | Repeatability limit (r) ≤ 0.02%, Reproducibility limit (R) ≤ 0.04%. |
| Potassium iodate titration method | Determination range: 0.50%~20.00% | Easy to operate, suitable for high sulfur content determination. | Repeatability limit (r) ≤ 0.30%, Reproducibility limit (R) ≤ 0.40%. |
Standard formulation background and technological evolution
With the advancement of tin concentrate smelting technology, the demand for accurate determination of sulfur content is increasing. The old version of the standard (GB/T 1819.10—2004) mainly uses high-frequency infrared absorption method and combustion potassium iodate titration method, but it has shortcomings in terms of determination lower limit and reagent requirements. The new version of the standard significantly improves the accuracy of the measurement results by optimizing the use of flux and adjusting the precision indicators.
Taking the high-frequency induction furnace combustion infrared absorption method as an example, its lower limit of measurement has been increased from the original 0.0010% to 0.050%. At the same time, test report clauses have been added to further standardize the experimental operation process.
Implementation suggestions and precautions
- Reagent selection:It is recommended to give priority to high-purity standard samples to ensure the accuracy of the calibration curve.
- Equipment maintenance:Regularly calibrate the high-frequency induction furnace and infrared absorption instrument to ensure that the sensitivity meets the requirements.
- Safety tips:Wear a mask and maintain good ventilation conditions during the experiment to prevent the risk of arsenic poisoning.
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