Sorry if this sounds stupid, but we've done a soil prac and found concentration values for 3 elements in the soil in mg/L, but the max values are in mg/kg.

Was wondering how to convert them;

"Maximum concentration in sludge (mg/kg or ppm)

Cadmium - 85

Copper - 3000

Lead - 4300"

Do I have to have the density of the 'sludge' to find the mg/L values?

If this helps...

Density of Cadmium = 8.64 g/cm³

Density of Copper = 8.92 gm/cm3

Density of Lead = 11.34 g/cm³

Was wondering how to convert them;

"Maximum concentration in sludge (mg/kg or ppm)

Cadmium - 85

Copper - 3000

Lead - 4300"

Do I have to have the density of the 'sludge' to find the mg/L values?

If this helps...

Density of Cadmium = 8.64 g/cm³

Density of Copper = 8.92 gm/cm3

Density of Lead = 11.34 g/cm³

## Comment