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Table 1 Analytical parameters of a GC-MS method for RSD (intraday and interday accuracy of repeated injections; %), LOD (limit of detection) and LOQ (limit of quantification) for cannabinoid internal standard (Cannabinoid Mixture 10; Cayman Chemical, Ann Arbor, MI, USA) injected three times at a concentration of 500 ng/mL

From: Semi-quantitative analysis of cannabinoids in hemp (Cannabis sativa L.) using gas chromatography coupled to mass spectrometry

  CBDV (mg/kg) CBD (mg/kg) CBG (mg/kg) CBC (mg/kg) Δ8-THC (mg/kg)
Repeat-1 @ 500 ng 0.55 0.56 0.56 0.55 0.55
Repeat-2 @ 500 ng 0.56 0.56 0.59 0.54 0.47
Repeat-3 @ 500 ng 0.50 0.68 0.51 0.51 0.46
Average 0.54 0.60 0.55 0.54 0.49
2xSD 0.07 0.13 0.08 0.04 0.10
RSD 6% 11% 7% 4% 10%
LODb 82.31 166.40 100.93 50.19 118.90
LOQb 274.36 554.65 336.42 167.30 396.32
  Δ9-THC (mg/kg) CBDA (mg/kg) CBN (mg/kg) CBGA (mg/kg) THCA (mg/kg)
Repeat-1 @ 500 ng 0.54 0.44 0.56 0.40a 0.45
Repeat-2 @ 500 ng 0.55 0.57 0.55 0.59 0.56
Repeat-3 @ 500 ng 0.46 0.51 0.49 0.56 0.49
Average 0.52 0.51 0.53 0.57 0.50
2 × SD 0.10 0.13 0.07 0.05 0.12
RSD 9% 13% 7% 4% 12%
LODb 122.37 164.20 88.90 56.49 144.68
LOQb 407.91 547.33 296.34 188.30 482.28
  1. a0.40 ratio is an outliner
  2. bLOD/LOQ are based on 3 × SD/10 × SD