| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 643 | Sandie Richards |
JAM
|
51.98 Q | 0.213 |
| 2 | 731 | Olesya Zykina |
RUS
|
52.18 Q | 0.253 |
| 3 | 777 | Monique Hennagan |
USA
|
52.43 Q | 0.198 |
| 4 | 593 | Catherine Murphy |
GBR
|
52.45 | 0.162 |
| 5 | 701 | Ionela Târlea |
ROU
|
52.87 | 0.191 |
| 6 | 537 | Foy Williams |
CAN
|
53.61 | 0.163 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | 713 | Olga Kotlyarova |
RUS
|
51.63 Q | 0.246 |
| 2 | 786 | Suziann Reid |
USA
|
51.84 Q SB | 0.145 |
| 3 | 539 | Kaltouma Nadjina |
CHA
|
51.92 Q NR | 0.187 |
| 4 | 610 | Shanta Ghosh |
GER
|
51.93 | 0.179 |
| 5 | 619 | Aliann Pompey |
GUY
|
53.18 | 0.191 |
| 6 | 521 | Natallia Solohub |
BLR
|
53.60 | 0.139 |