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Table 2 Normal and spiked LCMS results obtained from accelerated ageing of commercial grade 4,4′-MDA

From: Analysing for 4,4′-diaminodiphenylmethane in heritage collections containing solid and medium density flexible linear polyester polyurethanes using liquid chromatography/mass spectrometry

  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