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seenu · Credits: 3752 My Scrapbook

Q.272. in unexpected persons the levels of cuproporphyrin in urine is
a) < 150microg/l b) < 1mg/l c) > 0.5mg/l d) none

SATVIK · Credits: 958 My Scrapbook

i think the Q is asking about the "non exposed to the lead"
in that case then the level of coproporphyrin in the urine greater than 150 micrograms/litre indicates exposure to lead.
other values:_
ALA levels in urine > 5mg/lit indicates clearly lead absorption
lead in urine > 0.8 mg/lit indicates lead exposure and absorption
lead level in blood > 79 ug/100ml is associated with clinical symptoms.

ref - park , 15th ed, pg no - 546

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