A monovalent cation. It is typically found at much lower concentrations than sodium. The salts of potassium are highly soluble and do not cause a RO scaling problem. [....]
pH
The pH of the feed water measures the acidity or basicity. A pH of 7.0 is considered neutral. A pH between 0.0 and 7.0 is acidic. A pH between 7.0 and 14.0 is basic. To the analytical chemist, pH is a method of expressing hydrogen ion concentration in terms of the power of 10 with the pH value being [....]
Nitrate (NO3)
A monovalent anion. Nitrate salts are highly soluble and do not cause a RO scaling problem. Nitrate, along with ammonia gas and ammonium, is a nitrogen-based ion whose presence is tied with nature’s nitrogen cycle. The primary sources of nitrogen introduction in a feed water come from decomposing animal and plant waste, septic systems, animal feed lot runoff, or [....]
Mg/l
A method of reporting the "actual" weight (milligrams) of an ion or substance in a given volume of water (liter). For dilute solutions, mg/l and ppm are equivalent. For example, a 1,000 mg/l (ppm) sodium chloride solution would result in a residue of 1,000 mg of NaCl after evaporation of one liter of water. RO chemists use mg/l frequently [....]
Meq/l
A method of reporting the concentration or "equivalent" weight of an ion or substance in a given volume of water as milli-equivalents per liter. Meq/l is calculated by dividing the mg/l by the equivalent weight of the ion or substance. Reporting the concentration of ions as meq/l is popular by RO chemists for determining whether a water analysis is [....]
Manganese (Mn)
Manganese is a water contaminant present in both well and surface waters, with levels up to 3 ppm. Manganese, like iron, can be found in organic complexes in surface waters. In oxygen-free water, it is soluble. In the oxidized state, it is insoluble and usually in the form of black manganese dioxide (MnO2) precipitate. An alert level for potential [....]