ABSTRACT
This chapter briefly discusses the application, chemical properties and physical properties of cyanuric acid. It presents detailed information on the air analysis and analysis of aqueous and nonaqueous samples of cyanuric acid. Cyanuric acid is slightly soluble in cold water but much more soluble in hot water. It is also soluble in pyridine, hot alcohols, HCl, H2SO4, and caustic soda solution and insoluble in cold methanol, ether, benzene, acetone, and chloroform. During the analysis of aqueous and nonaqueous samples of cyanuric acid, aqueous samples are buffered with Na2HPO4 and analyzed by high-performance liquid chromatography–UV (HPLC–UV) at 225 nm. Aqueous samples are directly injected into a gas chromatography (GC) column for flame ionization detector (FID) determination. During the air analysis of cyanuric acid, air is drawn through PVC membrane filter. The analyte is extracted with a mixture of 0.005 M Na2HPO4 in 5" methanol (95" water) at pH 7 in ultrasonic bath for 10 min.
