NEW STEP BY STEP MAP FOR CHEMICAL OXYGEN DEMAND TEST

Ensure that the reagent blank vial is identical whole lot range as the test vials. Be aware: Not less than just one reagent blank has to be operate with Each individual set of samples with Every new ton variety of COD test vials.College students who Reside more than 50 miles from the Glen Ellyn campus and so are enrolled in an on-line system necess