Certo vs labcorp

Faint lines are always negative. The purpose of a drug test is to determine whether there is less or more of a certain concentration of metabolite present in the urine. You should interpret all Drug tests on a pass / fail basis. Drug testing cups are not quantitative and cannot indicate the amount of a drug that is present in the sample. Answer: They have the infrastructure in place to “move sausage through the mill without losing a drop to the floor”. Reagent kits have an expiration date. Sometimes it is counter productive to do a test because the number of orders for it are too low or hiring qualified people to do it is a prob.