2 ms·

Here is a good paper on that issue: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116340/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116340/ The best detect

by refurb 3y ago

Here is a good paper on that issue: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116340/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116340/ The best detection method can now measure below 1 part per trillion. That's one microgram of lead in 1 kilogram of material.