Dry Weight to Wet Weight Conversion?

Question

How do you convert the following 990.0 ppb amount of mercury found in muscle tissue from a sample of wet weight 7.60g and the same sample have 1.534g dryweight?

Answer 1

I am not quite sure but this is what I think

ppb is parts per billion and it is w/w in your case.

The mass of mercury is the same in both cases.
mass mercury in wet = mass mercury in dry

but mass mercury = concentration * mass sample

so conc(wet)* mass sam(wet) = conc(dry) * mass samp(dry) =>

990.0 *7.60 = x* 1.534 =>

x= (990.0 *7.60)/1.534 = 4904.8 ppb (if you really want to express it with the correct number of significant figures then you have to use 3 (because of 7.60) so it would be 4.90*10^3 ppb)

It's like a dilution problem in chemistry

Answer 2

Dry Weight Conversion