PPM means “parts for every million” which is one of the most commonly used units to measure quite very low concentrations of substances. A single component per million usually means one part of solute for every a million aspects of Alternative. If percentages, for each mille, and sections per million https://onlineppmcalculator13467.tinyblogging.com/5-simple-techniques-for-online-ppm-calculator-80496761