Crabby said:If you guys want an ultra high-precision salinity test, bring some samples out to my lab sometime...I've got a freeze-point depression osmometer and some calibrated standards. The osmometer is accurate to about plus/minus 1-2 milliosmolar (distilled deionized water = 0 milliosmolar, seawater = 1100 milliosmolar, so this is precise to within 0.2%).
Nice,
I may do that.