30g/l is 30 parts per thousand. Parts per is based only on masses, not on moles.
Joe "Love is never wasted." Joseph C Colosi PhD Associate Professor of Biology DeSales University 2755 Station Avenue Center Valley, PA 18034 610 282-1100 ex 1288 cell 610 762-9289 -----Original Message----- From: Ecological Society of America: grants, jobs, news [mailto:[email protected]] On Behalf Of Ted Turluck Sent: Wednesday, August 19, 2009 11:22 AM To: [email protected] Subject: [ECOLOG-L] Salinty in g/L vs ppt I'm trying to describe the salinity tolerances of a marsh plant. The literature sometimes refers to it in terms of ppt and at other times in terms of g/L (or mg/L). How do you convert one to the other? If a mL of water is 1g, then, for example, would 30g/L = 30ppt? Or, do you need to consider the molar (molecular?) masses of water and salt? Thanks in advance.
