How to convert 100 microgram/ml to 50 ng/ml? I need to put in 10ml solution.

Question

How to convert 100 microgram/ml to 50 ng/ml? I need to put in 10ml solution.

Answer 1

50 ng/ml = 50* 10^-3 microgram/ml = 0,05 microgram/ml

ur stock is 100 microgram/ml

C1 * V1 = C2 * V2

V1 = C2 * V2/C1

V1 =  0,05 * 10/100

V1 = 0,005 ml

Answer 2

use the dillution formula:

C1V1 = C2V2

(100e-6 g/ml)(V1) = (50e-9 g/ml)(10ml)

V1 = 5e-3 millilitres

your answer: use 5 ul , (aka 5 microlitres), of 100 microgram/ml solution to make 10 mls of a 50 ng/ml slution