Maclean 1964 1964 Water Analyses Procedure for salinity determinator Prepare 1 M. AgNO3 127.50 g / 1 L distilled H2O. store in light proof bottle. shake before using. Titrate standard sea water: 5 ml. std. into 125 ml Erlenmeyer flask. add ca. 20 ml dist. H2O. add 3 drops K2CrO4 soln. titrate w/ AgNO3 soln. until inevitable rust color appears. Titrate samples similarly. Calculation: If more than one trial / sample, average values. X = S·kx ks chlorinity = (chlorinity of standard) (ml AgNO3 X) (ml AgNO3 used in Std.) Salinity = 0.030 + 1.8050 Cl Standard (Denmark) Sea Water: Chlorinity = 19.373 %o