Sample Preparation
Crush & Grind the sample to size ≤ 0.2(GB) / 0.212(ISO) / 0.25mm(ASTM) Air dried
Moisture should be tested by oven or TGA in case of calculating St,d
Instrument
5E-IRS3600 Automatic Infrared Sulfur Analyzer, 5E-IRSII Infrared Sulfur Analyzer
Instrument Settings
Combustion chamber temp. :1350℃
Constant Oven: 48 ±1℃
Oxygen: Purity 99.5%
Pressure: (0.25 ± 0.01) MPa
Flow: (4.0 ± 0.2) L/min
Air Extracting Pump: 2.5L/min Calibration Standard: ASTM D4239
Nominal Sample Weight: 200mg Analysis Time: 120s
Special Modifications to Unit
None
Method Approval
GB/T 25214, ASTM D4239, ISO19579
Procedure
1. Prepare instrument as outlined in the operator’s instruction manual ( Routine check for temp. stability, gas leak test, etc.)
2. Purge the gas system for 10mins
3. (1-2) waste samples to condition the instrument
4. Run analysis for 1-2 standards sample for verifying the accuracy
5. Test 10-15 samples
6. 1-2 samples of calibration substance for verification (do drift correction if necessary)
7. Repetition of point 5 to point 6 until all samples are processed
Note
Do Calibrating refer to operator’s instruction manual for details.
Typical Results
Code |
Name |
Mass(g) |
St, ad(%) |
Range |
Average(%) |
Mad(%) |
St, d(%) |
2016071821 |
GBW11103j |
0.2177 |
0.32 |
0.08 |
0.37 |
2.0 |
0.38 |
2016071822 |
GBW11103j |
0.2025 |
0.40 |
2016071823 |
GBW11103j |
0.1976 |
0.38 |
2016071824 |
GBW11110k |
0.2095 |
4.42 |
0.01 |
4.42 |
1.7 |
4.50 |
2016071825 |
GBW11110k |
0.1996 |
4.43 |
2016071826 |
GBW11110k |
0.2118 |
4.42 |
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