Research Article
Pollution Characteristics of Atmospheric Carbonyl Compounds in a Large City of Northern China
Table 1
Elution procedure for HPLC.
| | Time (min) | Flow rate (ml/min) | Mobile phase A (%) | Mobile phase B (%) |
| | 0 | 0.8 | 66.7 | 33.3 | | 8 | 0.8 | 66.7 | 33.3 | | 12 | 0.8 | 75 | 25 | | 18 | 0.8 | 100 | 0 | | 19.5 | 0.8 | 100 | 0 | | 21 | 0.8 | 66.7 | 33.3 | | 24 | 0.8 | 66.7 | 33.3 |
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