# How to convert mg/L to mg/kg ?

Are these formulas correct for the conversion?

1. metal (mg/kg) = [conc of metals (mg/L) X volume of sample (mL)] / [sample weight (kg) x 1000]

2. metal (mg/kg) = mg/L * final volume (ml) / initial sample weight (g)

1. metal (mg/kg) = [conc of metals (mg/L) X volume of sample (mL)] / [sample weight (kg) x 1000]

2. metal (mg/kg) = mg/L * final volume (ml) / initial sample weight (g)

## Popular Answers

Tamer A. Elbana· National Research Center, Egyptmetal (mg/kg) = [conc of metals (mg/L) X volume of sample (L)] / [sample weight (kg)]

they are the same.

## All Answers (10)

Tamer A. Elbana· National Research Center, Egyptmetal (mg/kg) = [conc of metals (mg/L) X volume of sample (L)] / [sample weight (kg)]

they are the same.

B. I. Palella· University of Naples Federico IIDeletedKamal Karim· James Hutton InstituteElement (µg / g) = (C)(V) (d.f) / w

Where C is the concentration of the element in the sample solution in mg / L ; V is the volume of the undiluted sample solution in ml ; W is the sample weight in grams ; and d.f is the dilution factor , if used , as described below:

d.f = volume of diluted sample solution in ml / volume of aliquot taken for dilution in ml

Mohamed Hassan Hamza Abbas· Benha Universityplease use the expression "sample weight" rather than "initial sample weight"

In the first case you used the weight in kg and therefore you used "total volume of extraction (mL)*1000/sample weigh (kg)"

In the second case you used the weight in grams and therefore you used "total volume of extraction (mL)*1/sample weight (g)"

Davide Papurello· Politecnico di TorinoMeenakshi Verma· Sri Venkateswara UniversityEdvin Nugis· Estonian University of Life Sciences and Estonian Crop Research InstituteM.M.R. Jahangir· Bangladesh Agricultural UniversityMetal (mg/kg) = [conc. of metal (mg/L) * volume of sample (L)] / [sample weight (kg)].

Cyril Ehi-Eromosele· Covenant University Ota Ogun State, NigeriaIt can be done like Tamer A. Elbana posited and then can be converted to the other w/w forms like ug/g by dividing the numerator and multiplying the denominator by 1000.

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