When was hair analysis introduced and accepted?

Question

plzz help soon

Answer 1

Here are useful links concerning the subject matter. You should get your answer but they need a little patient and keen reading.....

http://www.atsdr.cdc.gov/HAC/hair_analys...

Very valuable link on hair analysis

http://www.chirobase.org/06DD/hair.html

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Here is a 5-paged PDF article on hair tissue mineral analysis

http://www.essex.ac.uk/bs/libs/paperslib...