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#1
02-05-2012, 09:54 PM
 confoozled Guest Posts: n/a
convert cortisol from mcg/ml to nmol/L

if cortisol is .5 mcg/ml what would it be in nmol/L.

i have no idea how to do this conversion stuff. any help would be appreciated.
#2
02-06-2012, 01:43 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,536 Rep Power: 19
Re: convert cortisol from mcg/ml to nmol/L

Quote:
 Originally Posted by confoozled if cortisol is .5 mcg/ml what would it be in nmol/L. i have no idea how to do this conversion stuff. any help would be appreciated.
To convert between grams and moles, you need the molar mass. The molar mass of cortisol (per Wikipedia) is 362.46 g/mol.

0.5 mcg/mL is also 0.5 mg/L
0.5 mg/L x 1 mol/362.46 g = 0.001379 mmol/L = 1379 nmol/L (should probably be rounded to 1380 or 1400, based on apparent precision of initial value)
#3
02-06-2012, 09:18 AM
 Unregistered Guest Posts: n/a
Re: convert cortisol from mcg/ml to nmol/L

i tried to do it myself and after an hour of looking stuff up came to the same answer. it didn't look right to me, i was sure i had done something wrong. since i'd never done anything like this before, it seemed very likely. i'm glad to see that i didn't.

thank you, that was really very helpful .

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