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Water Analysis Using LAMBDA UV-Visible Spectrophotometers A COD standard solution (100 mg/L) in water obtained from VWR was used to test the accuracy and precision of this method. An oven (or thermoreactor) was preheated to 148 oC. After removing the screw cap from a COD vial, 2.0 ml of the 100 mg/L COD standard was placed in the vial, the cap replaced, and the contents mixed vigorously. Cod Test Kit at Thomas Scientific Kit comes in a cardboard box and contains everything needed to perform...

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