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D1129 Terminology Relating to Water
D1141 Practice for the Preparation of Substitute Ocean Water
D1193 Specification for Reagent Water
D1254 Method of Test for Nitrite Ion in Water (Withdrawn 1980)
D3867 Test Methods for Nitrite-Nitrate in Water
D5810 Guide for Spiking into Aqueous Samples
D6146 Guide for Monitoring Aqueous Nutrients in Watersheds