Research Article
Direct Quantitative Analysis of Arsenic in Coal Fly Ash
Table 2
Optimized furnace program for the analysis of coal fly ash (solid sampling system).
| | Step | Parameters |
Ar gas | Temperature
(°C) | Rate
(°C s−1) | Hold time (s) | Total time
(s) |
| | Preheating | 70 | 1 | 60 | 114 | Min | | Drying | 105 | 10 | 30 | 33.5 | Min | | Drying | 120 | 10 | 20 | 21.5 | Min | | Ashing | 600 | 100 | 20 | 24.8 | Max | | Ashing | 1200 | 100 | 20 | 26.0 | Middle | | Ashing | 500 | 100 | 50 | 57.0 | Max | | Autozero (AZ) | 500 | 0 | 6 | 6.0 | Middle | | Atomization | 2150 | 500 | 7 | 10.3 | Middle | | Cleaning | 2600 | 1000 | 15 | 15.5 | Max |
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