For THC and other minor cannabinoids they can be detected when levels are above <0.0025%, for Delta 8 THC this is <0.005%
What is the accuracy of LOD and LOQ for THC.
The accuracy (evaluated as % spike recovery) for delta9-THC obtained in the validation at concentrations corresponding to limit of quantification (LOQ) ranged from 83.6 to 101.6%. Limit of detection (LOD) of the method has not been evaluated during validation at Acton laboratory.
What is accuracy of LOD and LOQ for other cannabinoids
The accuracy (% spike recovery) at LOQ for other cannabinoids in the scope of the method ranged from 86.8 to 104.5%. As noted above, LOD was not evaluated.
Is it correct that in order to get accurate results you need extremely pure reference samples of each cannabinoid?
That’s correct, pure reference materials for individual cannabinoids that are being used for calibrations are purchased from a vendor in a form of solutions with certified concentration.
Read more about the methods Eurofins use to analyse different cannabinoids