Quantitative analysis is an analysis to determine whether the substance is how much quantity, which is the finest example for this branch is the unit quality control (QC) of all factories must be inspected before the plant has a component meets or not reported. And another example is environmental control unit. To determine whether the substance is toxic to the body exceeds the volume or even on chicken or shrimp export industry go overseas, they must pass an examination for the quantity of toxins are not to exceed the standard as well.