Calculation of concentration unit

[Lassy]

I would like some help in working out the correct unit of concentration in the question below please.

I added a substance which has a density of 1.020 kg/m3 to a sample at a rate of 800 uL/ L of sample

The substance is also 60% w/w.

Will the final concentration in the sample be in 490 ug/L or 490 mg/L?

Thanks

 

[Prove It]

I would like some help in working out the correct unit of concentration in the question below please.

I added a substance which has a density of 1.020 kg/m3 to a sample at a rate of 800 uL/ L of sample

The substance is also 60% w/w.

Will the final concentration in the sample be in 490 ug/L or 490 mg/L?

Thanks

Are you using "u" to represent the greek letter $\displaystyle \begin{align*} \mu \end{align*}$? If so, the units are "microLitres" and "microGrams", correct?