Breaststroke queen Leisel Jones will be zeroing in on her 100m world record at the world championship trials in Brisbane.

The 21-year-old warmed up for her assault on the 65-second barrier by producing the third fastest swim in history in Monday night's semi-finals at Chandler Aquatic Centre.

Jones' benchmark is one minute 5.09 seconds, and no other swimmer has broken 66 seconds for the event.

Andrew Mewing (1:48.29) was the fastest qualifier for the 200m freestyle final ahead of Nick Frost (1:49.28) and former world record holder in the event, Grant Hackett (1:49.39).

The other finals are the women's 1500m and the men's and women's 100m backstroke.

In Monday night's action, Jess Schipper maintained her dominance in the 100m butterfly by touching out Libby Lenton.

Two-time Commonwealth Games champion Stephanie Rice collected her first national title by winning the 200m individual medley ahead of Shayne Reese.

Brenton Rickard won the men's 100m breaststroke and Matt Welsh won his 50th national title in the non-Olympic men's 50m butterfly.

Brought to you by AAP © 2024 AAP