Forensic tests such as luminal tests rely on the ability of blood to uptake oxygen: A protein in the blood called hemoglobin responsible for transporting oxygen throughout the body reacts with hydrogen peroxide and gives a positive test result. Chlorine-based detergents contaminate blood, but leave behind intact hemoglobin.
The Future of Blood. Register or Log In. The Magazine Shop. Login Register Stay Curious Subscribe. Its effect seems to have been untested until now. Existing subscribers, please log in with your email address to link your account access. Paid quarterly. Inclusive of applicable taxes VAT. The scientists have not yet determined the cause whereby active oxygen interferes in blood detection methods, but the authors have suggested a hypothesis.
Even so, the researcher concludes that washing the materials with products containing active oxygen does not eliminate the blood completely because brown traces remain, but it certainly does prevent detection by means of current tests, "and it is advisable to take account of this when using these methods in criminalistic research". The lecturer in Legal Medicine recognises that this poses a "serious" problem to the police scientists and insists that if the blood is not located DNA cannot be extracted from fluid, such that important evidence is lost in the resolution of certain crimes.
Note: Content may be edited for style and length. Science News. An unresolved mystery The scientists have not yet determined the cause whereby active oxygen interferes in blood detection methods, but the authors have suggested a hypothesis. Active oxygen doctors the evidence. Naturwissenschaften , ; 96 2 : DOI: ScienceDaily, 27 February
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