Lab Code 2613
Description: Organic Carbon, Dissolved, (DOC), Water, Filtered, GLASS FIBER, Sulfuric Acid Preserved
Analyzing Laboratory: USGS - National Water Quality Laboratory, Denver, CO
Parameter Name CAS Number RL Unit
Organic carbon 0.33 mg/L
Container Requirements
100mL DOC
Description: 125 mL Glass bottle, amber
Treatment and Preservation: Bottle baked at 450 deg C by laboratory. DO NOT RINSE BOTTLE BUT RINSE FILTER WITH ORGANIC-FREE WATER. Filter sample using supor or glass fiber filter (see Lab Code description above for filter type) , acidify to pH < 2 with 1 mL of 4.5N sulfuric acid (H2SO4), chill and maintain at 4 deg C, ship immediately. Glass fiber filter may be retained for Total Particulate Carbon or Particulate Inorganic Carbon analysis.
1. OFR 92-480 
Brenton, R.W., and Arnett, T.L., 1993, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination of dissolved organic carbon by uv-promoted persulfate oxidation and infrared spectrometry: U.S. Geological Survey Open-File Report 92-480, 12 p.
Method ID: O-1120-92