On the other hand, the exploration of the metallic skin odor could help waterĮngineers to explain customer complaints about “metallic odor” of drinking water. Not until recently that news about “cancer sniffing dogs” hit the public. Individual body odor, oxidative stress, and a variety of diseases could be identified by their specific chemical ”fingerprint“ of volatile odorants. The scientists want to encourage the medical community to develop an analytical iron assay to measure peroxidation of human skin, blood, and body tissue. It should be investigated whether iron could in this way impact human health“ suggests Glindemann. Skin, resulting in odorous and reactive organic compounds. ”Our research results confirm hints of the human nose that the iron that is widely abundant in our all-day environment is capable of reacting with the human The scientists are afraid that widely abundant organophosphorus corrosion products could lead to confusion “fingerprint” of the production and use of nerve gas. The publication also shows thatĬommon corrosion of cast iron results in additional organophosphorus compounds that are monitored under the Chemical Weapons Convention (CWC) since they are a They were never before detected in the environment, although high-tech laboratories produce them as semiconductor dopants. Since these phosphines oxidize quickly in air, Hans-Joachim Stärk from UFZ regarding this analytical challenge. Sensitive compared to the human nose” says Dr. “The difficulty was to maximize the production of theseĪir-sensitive organophosphines from iron in the laboratory, to be able to analyze them safely with sophisticated analytical equipment that was still much less
Use cast iron because it contains much phosphorus, is easily dissolved, and smells strongly”. These organophosphines: “Filings of cast iron heated in a reagent tube with aquatic hydrochloric acid yield foaming gas bubbles that smell like garlic or calciumĬarbide.
Glindemann is recommending a simple sniff-test to demonstrate Results from the formation of ”organophosphines“ from carbon and phosphorus impurities in the iron. The publication of the researchers also provides data about another ”garlic“ metallic odor-that of cast iron or steel that is dissolved in acids. The different metallic odor of phosphorus-rich iron The ability to smell blood was anĮvolutionary advantage because it allowed early humans and their animal ancestors to track and find injured and bleeding pray like a “blood trailing” dog. The very distinct human sense for ”iron odor“ is akin to the sensitive sense of animals and humans for ”blood scent“. The researchers also showed that the same iron odor is produced when blood is rubbed on skin, since fresh blood contains “bivalent” iron. From iron odor to blood scent – on a track back to prehistoric times Since skin fat sticks to metal surfaces, a coin or a door handle containing iron or copper will smell via the decomposed lipidperoxides fromĪll the human users that have previously touched them. This reactive form of iron (also called green rust) is a result of partial dissolution (corrosion) of the iron metal with acidic sweatįrom the skin. These odorous aldehydes and ketones split off of a kind of rancid skin fat (lipidperoxides) due to their decomposition by The odors humans perceive as “metallic” when they touch iron are really volatilized compounds of skin” said Prof.Īndrea Dietrich from Virgina Tech. It is not evaporated iron atoms that smell. “We are the first to demonstrate that when humans describe the “metallic” odor of iron metal, Scientists from Blacksburg (VA, USA) und LeipzigĪre now working to unravel the equally complex chemistry of smell. Prize in Medicine for being the first to decipher the more than 1000 genes that determine the sense of smell. Only two years ago, Linda Buck and Richard Axel were awarded the Nobel Of all the human senses, odor has been the most difficult to scientifically explain. Leipzig-Halle (UFZ) are now published by the highly rated science magazine ”Angewandte Chemie International Edition“. Scientists of Virginia Polytechnic Institute and State University (Virginia Tech), the University of Leipzig, and the Centre for Environmental Research These research results under participation of Societal Transformations towards SustainabilityĬolor-tests of iron powder, copper penny, brass keyĪ German-American research team led by chemist Dietmar Glindemann was able to prove these fallacies wrong.
Environmental Engineering and Biotechnology
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