Yes ppm is expressed in weight, actually mass, but under a constant gravity they are equivalent for this.
1 ppm = 1 mg per kilogram or since water has 1 kg of mass per liter, that works out to 1 mg per liter of water. Marshall Rich Adams wrote: > ppm is based > > on weight > > I don't think so. Not with "per" in there. > > Respectfully, > Rich Adams > > -- > The silver-list is a moderated forum for discussion of colloidal silver. > > Instructions for unsubscribing may be found at: http://silverlist.org > > To post, address your message to: [email protected] > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > List maintainer: Mike Devour <[email protected]>
