Abstract
A photodetection device permitting rapid and direct photographic recording of light emission from luminol-based immunodot and Western blotting assays is described in detail. This device permits contact exposure on Polaroid film of luminescent samples on nitrocellulose strips, and thus obviates the need for darkroom and film processing facilities. Immunodetection of mouse α-fetoprotein in brown fat homogenate and immunoglobulin E in nonimmune human sera employing luminol-based Western blotting and immunodot assays were used to demonstrate the versatility and operational simplicity of the detection device. The use of the detection device in combination with luminol-based immunoassays resulted in greater signal intensities and increased sensitivity over that attainable with the commonly used chromogenic substrate, 4-chloro-1-naphthol.
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