LaMotte COD3 Plus Operator's Manual

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LaMotte COD3 Plus Operator's Manual Manual pdf 107 page image

COD3 Plus Colorimeter 3.11 DISSOLVED OXYGENDISSOLVED OXYGENWINKLER COLORIMETRIC METHOD • CODE 3688-SCQUANTITY CONTENTS CODE30 mL *Manganese Sulfate Solution *4167-G30 mL *Alkaline Potassium Iodide Azide *7166-G30 mL *Sulfuric Acid 1:1 *6141WT-G1 Sample Tube, screw cap 291801 Cap 28570*WARNING: Reagents marked with an * are considered to be potential healthhazards. To view or print a Material Safety Data Sheet (MSDS) for these reagentsgo to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail,phone or fax.Dissolved oxygen is vital to the survival of aquatic organisms. Naturally present,dissolved oxygen enters the water when plants photosynthesize. Wind and waveaction also cause oxygen from the air to dissolve into water. Dissolved oxygen isconsumed by aquatic animals and by the oxidation, or chemical breakdown, ofdead and decaying plants and animals. The concentration of dissolved oxygenin natural waters can range from 0 to 14 ppm and is effected by temperature andsalinity.APPLICATION: This method is applicable for the determination ofdissolved oxygen in drinking water, all surface watersand wastewater.MDL: 0.6 ppmRANGE: 0.0–10.0 Dissolved OxygenMETHOD: This method uses the azide modification of the WinklerMethod with a colorimetric determination of the yellowiodine produced from the reaction with the dissolvedoxygen.INTERFERENCES: The presence of other oxidizing agents may causepositive interferences. Reducing may cause negativeinterferences. Nitrite interferences are eliminated with theazide modification.Test Procedureswww. .com information@itm.com1.800.561.8187