Head-Space GC Determination of Migrated Amount of Methyl Methacrylate from Products of PMMA

Head-space GC was applied to the determination of migrated amount of methyl methacrylate monomer from products of polymethyl mathacrylate (PMMA). The equilibrium temperature and time of head space sampler were set at 80 ℃ and 30 min, respectively. The PMMA sample was immsersed in 20% (φ) aqueous ethanol solution, and the analyte was separated on HP-INNOWAX column and detected by FID. Linear relationship between values of peak area and mass concentration of methyl methacrylate was kept in the range of 0.2-30.0 mg·L-1 with detection limit (3S/N) of 0.08 mg·L-1. Values of recovery found by standard addition method were 92.7% (0.55 mg·L-1 added) and 99.4% (5.50 mg·L-1 added) with RSD′s less than 3%.