Sigma hplc vial caps supplier-Aijiren HPLC Vials Sigma chemical oxygen demand tubes supplier from Turkey Testing Vial – Testing Phial Latest Price, Manufacturers Specifications For determination of high range Chemical Oxygen Demand (COD) by the Reactor Digestion method – US EPA approved for wastewater analysis using Hach Method 8000 – Range: 20 -1500 mg/L COD – Pack of 25 vials Features: