[A]rm's length has generally been defined to mean that there are no bonds of dependence, control or influence, between the corporation and the person in question.. In MNR v Sheldon, Justice Esson of Canada's Supreme Court wrote:
Analytical chemistry focuses on the chemical composition and function of matter. Analytical chemists are concerned with reaction rates and levels of chemicals in different types of matter. For example, an analytical chemist might test a patient's blood to investigate how a medication is working.
Physical chemistry involves the use of infinitesimal calculus in deriving equations. It is usually associated with quantum chemistry and theoretical chemistry. Physical chemistry is a distinct discipline from chemical physics, but again, there is very strong overlap.