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Chemical Oxygen Demand (COD) Testing Kits | CHEMetrics A COD test typically involves digestion of a water sample in a sealed vial with potassium dichromate and sulfuric acid at 150oC for 2 hours. Why test for COD? Aijiren Sample Vials for GC for Sale-News Aijiren is a manufacturer of HPLC Vials,GC Vials,Sample Vials,COD Test Tube,EPA Sample Storage buy wholesales 10mL chemical oxygen demand vials exporter. News News wholesales certified 10mL hach cod vials exporter factory Nov 22, Get Price...

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