GB/T 3653.7-2020 in English
VALIDFerroboron—Determination of sulfur content—Infrared absorption method
- Issued on:2020-03-06
- Implemented on:2020-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
《GB/T 3653.7-2020硼铁 硫含量的测定 红外线吸收法》由TC318（全国生铁及铁合金标准化技术委员会）归口，TC318SC1（全国生铁及铁合金标准化技术委员会化学分析分会）执行，主管部门为中国钢铁工业协会。
Introduction
Core Interpretation of the Standard
This standard specifies the method for determining the sulfur content in ferroboron using the infrared absorption sulfur analyzer. The technical points are as follows:
Principle of the Method
The sample is burned at high frequency in an oxygen flow, and the generated SO2 gas absorbs infrared energy of a specific wavelength when passing through the infrared detector. The absorption intensity is proportional to the sulfur concentration. The calculation formula is: w(S)=k×ΔE (k is the correction factor, ΔE is the energy change value).
Key Equipment Requirements
| Components | Technical Parameters | Remarks |
|---|---|---|
| High Frequency Induction Furnace | ≥1500℃ | Need to be used with ceramic crucible |
| Infrared Analyzer | Sensitivity1.0×10-6 | Requires regular calibration |
| Oxygen System | Purity>99.95% | Including two-stage pressure regulation |
Operation Specifications
Typical test process:
- Sample preparation: pass through 0.088mm sieve, weigh 0.20g±0.001g
- Flux ratio: 0.2g tin particles + 0.5g pure iron + 1.5g tungsten particles
- Combustion parameters: integration time 40-60s, oxygen flow rate 3.0L/min
The actual case shows that when the sulfur content is 0.018%, the relative standard deviation of the measurement results of 8 laboratories is RSD≤5.8%.
Comparison of Technological Evolution
| Version | Detection Range | Main Improvements |
|---|---|---|
| 2008 Edition | 0.005%-0.05% | Traditional Chemical Method |
| 2020 Edition | 0.002%-0.025% | Improved Sensitivity of Infrared Method |
Implementation Suggestions
- Quality Control: Each batch of samples needs to be tested with standard substances simultaneously, and the deviation should be ≤ the repeatability limit r
- Equipment maintenance: Check the discoloration of magnesium perchlorate desiccant weekly and replace it in time
- Safety warning: The combustion process generates high temperatures, so fireproof crucible tongs are required
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 24198-2009 in English
Ferronickel—Determination of nickel silicon phosphorus manganese cobalt chromium and copper contents—Wavelength dispersive X-ray fluorescence spectrometry(Routine method)
2009-07-08 -
GB/T 5686.2-2022 in English
Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal—Determination of silicon content—Molybdenum blue spectrophotometric method , silicon potassium fluoride titrimetric method and perchloric acid dehydration gravimetric method
2022-10-12 -
GB/T 47403-2026 in English
Ferroniobium—Determination of niobium，tantalum，silicon, phosphorus ，aluminium contents—Wavelength dispersive X-ray fluorescence spectrometric (fused cast bead method)
2026-03-31 -
GB/T 31924-2015 in English
Nickel pig iron―Determination of nickel content―dimethylglyoxime gravimetric method
2015-09-11 -
GB/T 21931.3-2008 in English
Nickel ferronickel and nickel alloys - Determination of phosphorus content - Phosphovanoclonolybeate molecular absorption spectrometric method
2008-05-30 -
GB/T 5059.1-2014 in English
Ferromolybdenum―Determination of molybdenum content―Lead molybdate gravimetric method,ammonium metavanadate titration method and 8-hydroxyquinoline gravimetric method
2014-06-09 -
GB/T 7731.12-2008 in English
Ferrotungsten - Determination of sulfur content - Infrared absorption method and combustion titration method
2008-05-13 -
GB/T 4699.2-2025 in English
Ferrochromium，silicochromium，nitrogen-bearing ferrochromium and high nitrogen ferrochromium—Determination of chromium content—Ammonium persulfate oxidation titrimetric method and potentiometric titration method
2025-08-01
