How do I convert a Conc. in µg/ml to µg/g of wet weight?

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William Letter

Volume to mass conversion means you must account for the density.

Maria Stacewicz-Sapuntzakis

The question does not make sense unless one knows the character of the sample (how it was prepared). Otherwise, 1 mL water = 1 g..

Hamid Reza Farhang

https://environment.des.qld.gov.au/__data/assets/pdf_file/0022/90148/data-handling-units-and-concentrations.pdf

Bruce Neagle

It depends on the sample! With a plant or biomass sample, it is split and the moisture determined on one half as per AOAC (moisture oven operated 105 Celcius overnight) and the protein concentration determined on the remaining portion.

If it is water based (you assume that the density is 1 mg/mL) then 1 ug/mL is 1 mg/g.