anchor: 3.1 To prepare 20 L of a standard, synthetic, reconstituted seawater (modified GP2), using reagent grade chemicals (Table 3), with a salinity of 31 , follow the instructions below.
positive: Reconstituted seawater is prepared with reagent grade chemicals and has a salinity of 31.
negative: 20 L is 100 ounces when converting from metric to US systems.