This International Standard specifies a method for determining potassium by flame emis ion spectrophotometry, in potassium chloride for industrial use, that is to say in a product whose minimum KCl content is 95% (m/ m) approx. This limit, conventionally expressed in K or K20, corresponds respectively to approximately 50% (m/m) or 60% (m/m).
NBN T 03-221-1980 history
1980NBN T 03-221-1980 Potassium chloride for industrial use - Determination of potassium content - Flame emission spectrophotometric method