An absolute dating slow that depends on measuring the chemical composition of a specimen. Chemical dating can be used when the specimen is known to undergo slow chemical change at a known rate. For instance, phosphate in buried bones is slowly replaced by fluoride ions from slow ground water. Measurement of "dating" proportion of fluorine present https://passive-income.info/futa-dating-simulator.php a rough estimate of the time that the bones have been in the ground.
Another, more accurate, method depends on the fact that amino acids in living organisms dating l-optical isomers.
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After death, these racemize and the age of bones can be estimated by measuring the relative amounts of d- and l-amino acids present. From: chemical dating in A Dictionary of Biology ».
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Related Content Related Overviews dating techniques amino-acid racemization. Show Summary Details Overview chemical link. Reference entries chemical dating in A Dictionary of Chemistry 6 Length: words. All rights reserved. Sign in to annotate. Delete Cancel Save. Cancel Save.