Ppb is a related term of ppq.
As initialisms the difference between ppq and ppb
is that ppq is parts per quadrillion while PPB is parts per billion.
ppq
English
Initialism
(Initialism)
(head)
parts per quadrillion
Synonyms
* (parts per quadrillion) fU , femtouno
Related terms
* ppm , ppb , ppt
See also
* (Parts-per notation)
* percent
* permille
* permyriad ppb
English
Initialism
(Initialism)
(head)
parts per billion