Hello Markus,
This is a very easy problem, and I even have the answer right now. In an act of good faith, I will give you the answer before even being paid. Since U-235 is most commonly used in nuclear fission, I will use the conversion values for it, but I will also give you the values for U-234 and U-238 if you would like.
U-235 is 80.011 Bq/g
0,011 Bq/L is therefore (0,011)/(80.011) = 1.374... g/L
1.374... g/L is 1374 mg/L
The formula is: X Bq/L divided by 80.011 Bq/g times 1000 mg/g.
However, for U-234 and U-238, I have different values that I can give you for the conversion.
I am new to Freelancer.com, and so, I don't have any ratings yet. As a result, I want to provide you with the best quality work so that I will be rated highly and that I may work with you and others like you again.
Best regards,
Kyle