Sorry, that's not right.  Organs or tissues differ in the amount of a chemical that they receive or to which they are exposed. This is primarily due to two factors, the volume of blood flowing through a specific tissue and the presence of special "barriers" to slow down toxicant entrance. Organs that receive larger blood volumes can potentially accumulate more of a given toxicant. Elimination reduces the amount of toxicant in the body but the effect should be proportionally the same for all organs.