parts per billion
"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 as long as they are the same or 1 part in 10^[9]." [UOC:GVG]
10^[-9]
ppb
parts per billion based unit
parts per billion
"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 as long as they are the same or 1 part in 10^[9]." [UOC:GVG]
10^[-9]
ppb