Method specificity was validated by quadrupole time-of-flight (Q-TOF) mass spectrometry. Only two out of nine hemp concentrates analyzed contained Δ8-THC, namely one type of Δ8-THC distillate and one type of Δ8-THC hemp shatter, where Δ8-THC contents were 70.96% and 72.32% (w/w),...