Fig. 3From: A sensitive chemiluminescence based immunoassay for the detection of cortisol and cortisone as stress biomarkersa Image of an ITO electrode taken with the digital camera showing the three separated circle containing immobilized ferrocene tagged anti-cortisol antibody, b images of blank after the addition of luminol/hydrogen peroxide mixture, c CL image of the blank after the incubation of 50 ng ml−1 cortisol hormone. Scale bar for image A is 5 cm, and B and C are 0.5 cm.Back to article page