Pearson Correlation Coefficient Calculator The Pearson correlation coefficient is used to measure the strength of a linear association between two variables, where the value r = 1 means a perfect positive correlation and the value r = -1 means a perfect negataive correlation.
One of these is the conversion from a percentage value to a PPM value because 1 PPM is just 10,000 times bigger than one percent. There are a couple of situations where a PPM calculation is very easy to do. As per PPM to percent formula, convert PPM to weight percent concentration of the solution by dividing the parts per million by 10000. One ppm is equal to 1 milligram of substances per liter of water (mg/l). One ppm is exactly equal to 0.0001% or the part of a whole number in units of 1/1000000 or 1×10-6. How do you convert ppm to weight percent? PPM means "parts per million," so to calculate it you divide the amount of the solute by the total amount of solution, them multiply by 10^6. We'd love to keep you informed about what is going on at Sequoia, and how our users and customers deploy and use their LISST instruments and other Sequoia products.įor that purpose, we maintain a mailing list.You can perform a PPM conversion easily provided you have two quantities in the same unit (or that you can convert into the same unit) or a percentage value. When ppm is used as a measure for the suspended particle concentration, it is therefore very important to specify if the concentrations are ppm BY VOLUME or ppm BY MASS, to facilitate comparisons with data where the concentrations are reported in µl/l or mg/l.ĭo you have a need for an instrument that can measure particle concentration? Have a look at our LISST-Portable|XR laser for laboratory use, our LISST-200X laser for field and submersible use, or our LISST-AOBS that measures concentration using acoustics. For example, a sample with a mass concentration of 100 mg/l will have a volume concentration of 38 µl/l. To convert from ppm by mass to ppm by volume, divide by the density of the particles. For example, a sample with a volume concentration of 25 µl/l will have a mass concentration of 25*2.65 = 66 mg/l. For mineral grains (clay, silt and sand sizes), this will typically be 2.65 g/cm3. To convert from ppm by volume to ppm by mass, multiply by the density of the particles. However, if ppm is expressed as THE MASS of particles in a unit volume of water, then ppm BY MASS is equal to mg/l. If ppm is expressed as THE VOLUME of particles to a unit volume of water, then ppm BY VOLUME is equal to µl/l.
But what parts? The amount of particles in a suspension can be expressed as the total volume OR total mass of particles in a unit volume of water AND THESE TWO NUMBERS WILL ONLY BE THE SAME IF THE DENSITY OF THE PARTICLES IS 1 g/cm3.