Table 2 Normal and spiked LCMS results obtained from accelerated ageing of commercial grade 4,4′-MDA
Normal LCMS solution results | Spiked LCMS solution results | |||
|---|---|---|---|---|
Chromato-gram peak area | ppm in PUR sample | Chromato-gram peak area | ppm in PUR sample | |
Aged 4,4′-MDA | 469,000 | 1.6 | 1,370,000 | 4.9 |