parts per trillion
"A dimensionless concentration notation which denotes the amount of a given substance in a total amount of 1,000,000,000 regardless of the units of measure used as long as they are the same or 1 part in 10^[12]." [UOC:GVG]
10^[-12]
ppt
parts per trillion based unit
parts per trillion
"A dimensionless concentration notation which denotes the amount of a given substance in a total amount of 1,000,000,000 regardless of the units of measure used as long as they are the same or 1 part in 10^[12]." [UOC:GVG]
10^[-12]
ppt