Standard Methods for the Examination of Water and Wastewater

1,1,1-Trichloroethane 1,2-Dichlorobenzene 1,2-Dichloroethane absorbance acid activated carbon alkalinity Anal analysis analyzed Apparatus Approved by Standard aqueous atomic absorption spectrometric blank bottle buffer buffer solution Calculation calibration curve calibration standards carbon cell Chem chemical Chloromethane color colorimetric column concentration cyanide detection limit detector determination digestion dilute to 1000 Dissolve distilled water dithizone electrode equivalent extraction filter gas chromatograph glass H₂SO HNO3 instrument interference iodine laboratory measured metal methanol mg/L mL conc mL sample mL water NaOH nitrogen oxidation oxygen particle phenol photometer pipet potassium Precision and Bias Prepare procedure purge range reagent reagent water recovery relative standard deviation residual rinse samples containing Section selenium sodium Sodium hydroxide solvent standard deviation Standard Methods Committee standard solution sulfate sulfide Sulfuric acid surfactant Table temperature titration tube U.S. ENVIRONMENTAL PROTECTION volumetric flask wastewater water and dilute Water Works Assoc µg/L