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Table 1 Selected resonances, limits of detection (LOD) and limits of quantification (LOQ) for compounds in e-cigarette liquids

From: Electronic cigarettes: overview of chemical composition and exposure estimation

  Substance Solvent NMR range used for integration [ppm] LOD [mg/L] LOQ [mg/L]
1 Nicotine Water 8.68-8.60 (multiplet) 1.6 5.5
2 Propylene glycol (1,2-propanediol) 3.47-3.42 (multiplet) 2.1 6.9
3 1,3-Butanediol 1.75-1.70 (multiplet) 2.3 7.6
4 1,3-Propanediol 1.85-1.75 (multiplet) 0.96 3.2
5 Ethylene glycol 3.69-3.67 (singlet) 0.17 0.56
6 Diethylene glycol 3.78-3.73 (multiplet) 0.51 1.7
7 Glycerol 3.82-3.75 (multiplet) 2.6 8.7
8 Menthol Chloroform 2.00-1.92 (multiplet) 12 40
9 Ethyl vanillin 9.81-9.83 (singlet) 1.0 3.4
10 Coumarin 7.80-7.65 (multiplet) 3.2 10
11 Camphor 2.40-2.30 (multiplet) 13 44
12 Safrole 6.80-6.60 (multiplet) 2.6 8.6
13 Thujone (sum of α- and β-diastereomers) 2.12-2.09 (singlet) 3.4 11