Chemiluminescence (CL) from horseradish peroxidase catalyzed aerobic oxidat
ion of indole-3-acetic acid (IAA) increased markedly in the presence of lum
inol. The luminol enhanced CL was applied to the determination of IAA. The
detection limit of IAA was 6.0x10(-6) M in the presence of luminol, and was
improved a factor of ten times compared to that in conventional spectropho
tometric method.