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Table 2 Relative distribution (%) of signal area over chemical shift regions (ppm) in 13C-CPMAS-NMR spectra of bulk compost samples at initial and final experimental time

From: Decomposition of bio-degradable plastic polymer in a real on-farm composting process

Sample Carbonyl O-aromatic Aromatic O-alkyl CH3O/CN Alkyl HBa A/AOb
190–160 160–145 145–110 110–60 60–45 45–0
t0 4.1 3.0 8.6 58.4 10.5 15.4 0.50 0.26
Test A 6.7 3.4 12.0 48.0 11.4 18.5 0.69 0.39
Test B 7.1 4.0 12.3 47.9 11.1 17.6 0.68 0.37
Test C 5.7 3.6 11.6 49.2 11.0 18.9 0.68 0.38
  1. aHB = Σ[(0–45) + (45–60) + (110–160)]/Σ[(45–60) + (60–110) + (160–190)]
  2. bA/OA = Σ(0–45)/Σ(60–110)