Ppm
Parts per million, i.e. a concentration (mg/l, g/t) of one millionth (1/1 000 000, 10-6).
Parts per million, i.e. a concentration (mg/l, g/t) of one millionth (1/1 000 000, 10-6).
Parts per million, i.e. a concentration (mg/l, g/t) of one millionth (1/1 000 000, 10-6).
Parts per million, i.e. a concentration (mg/l, g/t) of one millionth (1/1 000 000, 10-6).