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Summary
Semi-final 1
| Rank | Name | Nation | Time |
| 1 | Zhang Yanmei | CHN | 46.01 |
| 2 | Amy Peterson | USA | 46.28 |
| 3 | Kim So-Hui | KOR | 46.36 |
| Disqualified | |||
| Yang Yang (S) | CHN | ||
| Rank | Name | Nation | Time |
| 1 | Cathy Turner | USA | 47.54 |
| 2 | Won Hye-Gyeong | KOR | 47.63 |
| 3 | Wang Xiulan | CHN | 48.00 |
| Disqualified | |||
| Isabelle Charest | CAN | ||