Simplified method for the determination of N-nitrosamines in rubber vulcanizates

摘要: Abstract A simplified method for the trace determination of N -nitrosamines in carbon black-loaded rubber compounds is described. The extraction volatile nitrosamines accomplished by thermal desorption rather than traditional solvent procedure. analytes are trapped on Thermosorb/N sorbent and subsequently analyzed gas chromatography with energy analyzer detection (GC/TEA). Conditions that provide full from actual were determined to be 30 min at 150 °C vessels dynamically purged 2 . Method precision was found 10% NDMA 71 ng/g 7.3% NMOR 248 ng/g. Recoveries seven common ranged 94 117%. Limits matrix 6.3–13 ng/g. technique offer improved recovery lower molecular weight it shown simpler faster previous techniques.