The result of an appeal by north Queensland trainer Glen Baker against his two-year disqualification for a cobalt offence should be known within two weeks.

Baker was disqualified last month after a high reading of cobalt was found in a sample taken from French Lesson who won at Doomben in January.

Lawyer Matt Tutt appeared for Baker at an appeal before the Racing Disciplinary Board on Friday.

Baker did not appeal his conviction but disputed the length of his penalty.

Tutt argued cobalt should be treated no differently from other positive swabs.

He said there was nothing to suggest Baker had deliberately given the horse cobalt and said there was still debate about whether cobalt could build up in a horse from the use of legal supplements.

He said the sentence should be reduced substantially.

Chief steward Allan Reardon said the offence had been committed after the legal threshold for cobalt has been established on January 1.

He said there needed to be deterrent sentence and two years took the mitigating factors into account.

Appeal board chairman Brock Miller adjourned the hearing to enable a written judgment.