Detection of zinc as a confirmatory test for identification of seminal stains

An extremely simple and qualitative method for the identification of seminal stains depends on the high level of zinc in human semen. PAN [1-[2-pyridylazo]-2-naphthol] which reacts with zinc to develop a bright pink color was used. The data presented included the sensitivity, stability and specificity of the results by using three procedures. Any method of the three procedures can be used for the identification of human semen even in old samples [three years old]