Hello all, I am currently trying to convert brine salinity values in ppm to the corresponding brine density. My understanding is that I can do that using ppm * SG = mg/L . However I do not know how to get the Specific Gravity (SG) of my brine. The data I try to convert has a minimum value of 0ppm, a maximum value of 600,000 ppm and a mean of 118,000 ppm. My understanding is that I can't simply assume that SG = 1 because I have high salinities. Most of the data I can find only refers to seawater and I am dealing with brines at high pressure and temperatures. I was therefore wondering if there was an equation to get SG in function of pressure, temperature and salinity. Thank you for your help !