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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)