Which measure of concentration is best used when working with small concentrations? Chemistry Solutions Measuring Concentration 1 Answer anor277 Jul 9, 2016 Perhaps #"ppm"#, #"parts per million"#? Explanation: #"1 ppm"# in aqueous solution #=# #1*mg*"solute per litre of solution"#. At these concentrations, we really do not have to bother about considerations of density. Answer link Related questions How do you measure concentration from absorbance? How do you measure concentration of a solution? How do you measure concentration of CO2? What concentration measure changes with temperature? How can I measure the concentration of salt in water? How is the concentration of a solution measured? How does the concentration of electrolyte affect an electrochemical cell? How does normality differ from molarity? What is the molality of a solution of 10 g NaOH in 500 g water? What are the mole fractions of the components of the solution formed when 92 g glycerol is mixed... See all questions in Measuring Concentration Impact of this question 2102 views around the world You can reuse this answer Creative Commons License