Polarographic determination of pentachlorophenol

Polarographic study of chloranil and its related compounds. IV

Abstract

Pentachlorophenol was oxidized to chloranil with potassium chlorate and hydrochloric acid as in the cases of phenol and salicylic acid as in the preceding studies. But chloranil was quantitatively obtained as a stable end product from pentachlorophenol by the oxidation with nitric acid instead of potassium chlorate and hydrochloric acid.
The author recommended a method in which the chloranil derived from pentachlorophenol by nitric acid oxidation was extracted with ether and was determined by the polarography in 50% alcohol solution at pH 3.4 using N/10 potassium nitrate as a supporting electrolyte.