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1 <br />~i 1 <br />t <br />1 <br />Nitrite <br />' Spectrophotometric ...... <br />Oxygen, Dissolved <br />Membrane Electrode .............................................................. <br />Modified Winkler (Full Bottle Technique) ......................... <br />Phosphorus <br />Ali Forms <br />Colorimetric, Automated, Ascorbic Acid... <br />Colorimetric, Ascorbic Acid, <br />.... Method 354.1 <br />Method 360.1 <br />Method 360.2 <br />.. Method 365.1 <br />Single Reagent ........................................................................ Method 365.2 <br />Colorimetric, Ascorbic Acid, <br />Two Reagent ........................................................................... Method 365.3 <br />Total <br />Colorimetric, Automated, Block Digestor, AA II ................. Method 365.4 <br />Silica, Dissolved <br />Colorime[ric ..................................... <br />Sulfate <br />Method 370.1 <br />Colorimetric, Automated Chloranilate ............................................... Method 375.1 <br />;. -Colorimetric, Automated Methyl Thymol Blue, AA II ................. I~Iethod 375.2 <br />,: _Gravimetric ........................................................................................... Method 375.3 <br />Turbidimetric ........................................................................................ Method 375.4 <br />Sulfide <br />Titrimetric, Iodine ........................... <br />Colorimetric, Methylene Blue......... <br />Sulfite <br />Ti trimetric .......................................... <br />400 Organics <br />Biochemical Oxygen Demand <br />BOD (5 day. 20°C) .......................... <br />Chemical Oxygen Demand <br />....... Method 376.1 <br />....... Method 376.2 <br />Method 377.1 <br />................................ Mkthod 405.1 <br />Titrimetric, Mid-Level ......................................................................... Method 410.1 <br />Titrimetric, Law Level ........................................................................ Method 410.2 <br />Titrimetric, High Level for Saline Waters ....................................... Mt:thod 410.3 <br />Colorimetric, Automated; Manual ..................................................... Method 410.4 <br />si <br />