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#1




how to convert ppm to mg/kg if the sample taken is in grams
i have a result of iron 2.3 ppm and i have take the 0.2 g sample

#2




Re: how to convert ppm to mg/kg if the sample taken is in grams
Quote:
Is this what you wanted to know? Or do you want to know how much original material you need in order to get 0.2 grams of your compund of interest? 
#3




Re: how to convert ppm to mg/kg if the sample taken is in grams
Wrong. It depends on the density of each substance.

#4




Re: how to convert ppm to mg/kg if the sample taken is in grams
Quote:
Ppm is an ambiguous term because it can be calculated on a mass, volume, or molefraction ratio. Assuming mass/mass is meant, the above interpretation is correct. Actually ppm on v/v basis is not too common, It is usually mass/mass for solids and mole/mole for gases. Liquids may be mass over mass, or mass over a volume of one liter assumed to be a kilogram. 
#5




Re: how to convert ppm to mg/kg if the sample taken is in grams
Hallo every one
1 ppm =1 mg/kg and this equation for the solid materials . for example 100 ppm lactic acid it means 100 mg /kg or 100 gram/1000 kg 
#6




Re: how to convert 1.61 g/kg to porcent (%) if the sample is soil
I sended a soil sample to chemical soil laboratory. The analisys answer for TOTAL NITROGEN IS : 1.61 g/kg. I need to convert this value ( 1.61 ) to porcent (%). How i can do this ? Easier, let me know the answer directly. Please.
THANKS. 
#7




Re: how to convert ppm to mg /g
I have taken 2g of sample for ashing and made it to 50 ml, from that again i have taken 0.250 ml to make 100ml. now i got 0.0283ppm how can i convert to mg / g.

#8




Re: how to convert ppm to mg /g
Quote:
Because of the intermediate dilution only part of your initial 2 g sample contributed to the 100 mL of solution, specifically 2 g x 0.25 mL/50 mL, or 10 mg. Therefore the concentration in your sample was 2.83 µg/10 mg, or 0.283 mg/g. 
#9




Re: how to convert ppm to mg/kg if the sample taken is in grams
i take 5 gm of sludge than make it 100 ml as final volume...and from this 0.5 ml of sample..now my answer is 220 mg/l..how can i convert into gm/kg

#10




Re: how to convert ppm to mg/kg if the sample taken is in grams
220 mg/1000 mL x 100 mL/5 g=4.4 mg/g = 4400 mg/kg

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