Let's take our LOD : 0.0115 mg/l

Was measured on 3x diluted solution : initial concentration is 3x0.0115 = 0.0345 mg/l

You had 25ml total initial extraction volume, meaning you had : 0.0345 x 25 / 1000 = 0.0008625 mg in your total 25 ml from 2.5 g solids

So, your solid LOD is : 0.0008625 / 2.5 = 3.45 10-4 mg/g or 0.345 mg/kg

Hi Belal,

mg/ml=mg/g*(g/ml), and g/ml is the density unit, so you may find out the density of LOD and LOQ.