Spectrophotometric determination of microgram amounts of hydroquinone, pyrogallol and resorcinol

Abstract

Advances in polyhydroxyphenol chemistry are a result of the development of new experimental techniques, especially methods for detection and determination of these compounds. Small-scale procedures are valuable for establishing the concentration and the constitution of polyhydroxyphenols in plant products.Various spectrophotometric and colorimetric rneth~dsl-~ have been reported for the small-scale determination of polyhydroxyphenols. A spectrophotometric method6 has been developed for the determination of catechol, :resorcinol and phloroglucinol with the use of potassium iodate in dilute nitric acid.In this investigation hydroquinone, pyrogallol and resorcinol were determined spectrophotometrically, after heating with sodium carbonate solution in a boiling water-bath for about 15 min. The method is convenient and precise.

Amperometric magnetobiosensors using poly(dopamine)-modified Fe3O4 magnetic nanoparticles for the detection of phenolic compounds

“…Phenolic compounds constitute a large group of organic pollutants which should be monitored in environmental engineering 30,31 . Although, standard methods are adequate for quantitative phenolic determination 30,[32][33][34][35] , generally they require pretreatment processes and high-qualified personnel. In addition, traditional electrochemical sensors are very poor and the electrode surface may be fouled by insulating polymer films or by-products generated during phenolic detection 36,37 .…”

Study on electrochemical oxidation behaviors and the diffusion mechanism of hydroquinone at pre-anodized carbon paste electrode by cyclic voltammetry

“…In recent years, several analytical techniques have been employed for the determination of HQ, including flow injection analysis, [9][10][11] high performance liquid chromatography (HPLC) 12,13 and spectrophotometry. 14,15 However, those methods mentioned above require expensive instruments and complex operation. Since the electrochemical method has many unique characteristics of good accuracy, high sensitivity and low reagent consumption, types of electrodes such as the platinum electrode, 16 gold electrode, 17 and glassy carbon electrode 18 have been developed to determine HQ.…”