TDS and PPM: Is PPM parts of solid per litre or per Kg?
Posted: Mon Dec 06, 2010 2:08 am
Dear All,
I recently bought a TDS measuring tool that gives the reading in PPT (Parts per Thousands) which I can multiply the reading by 1000 and I get the PPM.
The Question is:
I have searched the net for the PPM (Parts per Million) and I have came cross two different interpretation:
1- A PPM or Parts per million is the same as mg/kg
Based on that My TDS reader would reflect 0.70 PPT and that means 700 PPM; which according to the above definition of PPM would be a 700 mg of solids present in 1 Kg of water.
2-A PPM or Parts per Million is the same as mg/litre.
So a 700 ppm means that there are 700 milligrams if dissolved solids present for every liter of water
the question is: the PPM is parts of solid per litre or per Kg?
Appreciated
Al
I recently bought a TDS measuring tool that gives the reading in PPT (Parts per Thousands) which I can multiply the reading by 1000 and I get the PPM.
The Question is:
I have searched the net for the PPM (Parts per Million) and I have came cross two different interpretation:
1- A PPM or Parts per million is the same as mg/kg
Based on that My TDS reader would reflect 0.70 PPT and that means 700 PPM; which according to the above definition of PPM would be a 700 mg of solids present in 1 Kg of water.
2-A PPM or Parts per Million is the same as mg/litre.
So a 700 ppm means that there are 700 milligrams if dissolved solids present for every liter of water
the question is: the PPM is parts of solid per litre or per Kg?
Appreciated
Al