The 5-Second Trick For chemical oxygen demand
Wipe the vials by using a moist towel to get rid of smudges and fingerprints from your vial and put them while in the preheated digestor block.The “cod” symbol will flash for 3 seconds, then the sample test consequence will seem from the Exhibit as element per million COD. File the test final result.COD contrasts with biochemical oxygen demand