What is EC meter used for? An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution.
In practice, different ions have different conductivity. Lenntech reports this conversion as a general average value. How do you convert ppm to conductivity? Divide the parts per million value by 0.64 to convert to a conductivity value. Water quality variables such as conductivity (EC) and total dissolved solids (TDS) can be used to calculate salt concentration. How do you calculate EC? To calculate the EC value, multiply the ppm value by 2 and divide by 1000. Worked Examples: Converting Percentage Concentration to ppmįollow these 4 steps to convert percentage concentration to parts.How do you calculate EC from PPM? To get an EC value, multiply the ppm reading by 2 and divide by 1000. M/v (w/v) and m/m (w/w) concentrations and parts per million will be discussed in the following section (after the worked examples of percentage concentration and ppm below). V/v concentration is NOT the same as a %(v/v) concentration M/m concentration is NOT the same as a %(m/m) concentration W/v concentration is NOT the same as a %(w/v) concentration M/v concentration is NOT the same as a %(m/v) concentration
Where x is the value of the percentage concentration
This is true for other similar percentage concentrations:įor mass/volume percentage concentrations (m/v% or w/v%):įor mass/mass percentage concentrations (m/m% or w/w%): We could write a mathematical expression equating parts per hundred (a percentage) and parts per million (ppm) as shown below: How would we convert that to a concentration in parts per million (ppm) ? This means that there are 9 000 parts of NaCl in every 1 000 000 parts of the solution.īut the concentration of a solution is sometimes given as a percentage.Ī percentage concentration tells you how many parts of solute are present in 100 parts of solution.įor example, the ethanol content in wine is often given as about 12%(v/v), that is, 12% of the volume of the wine is ethanol, or, there are 12 parts of ethanol in every 100 parts of solution. Recall that, in general, concentration tells you how much solute is present in a solution.Ī concentration in parts per million (ppm) tells you how many parts of solute are present in 1 000 000 parts of solution.įor example, a saline solution is a dilute aqueous solution of sodium chloride, NaCl (aq), with a concentration of 9 000 ppm. Parts per million and Percentage Concentration Calculations
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