ABSTRACT
This chapter briefly discusses the application, chemical properties and physical properties of pyrogallol. It presents detailed information on the air analysis and analysis of aqueous and nonaqueous samples of pyrogallol. Pyrogallol is a white crystalline solid, which is soluble in water and most organic solvents. During the analysis of aqueous and nonaqueous samples of pyrogallol, pH of aqueous samples is adjusted to below 2. Aqueous samples are extracted with methylene chloride, and the extract is concentrated and analyzed by gas chromatography/mass spectrometry (GC/MS) or gas chromatography-flame ionization detector (GC-FID). Alternatively, the extract is exchanged into 2-propanol and derivatized with pentafluorobenzyl bromide. Aqueous samples are directly injected onto the GC column for flame ionization detector (FID) determination. During the air analysis of pyrogallol, air is drawn through a sorbent cartridge containing polyurethane foam. Then, deposited particles are extracted with methylene chloride.
