Table 3.

Stability Under Experimental and Storage Conditions

Analyte	Room temp			4°C			Freeze–thaw			Long-term
	QC1	QC2	QC3	QC1	QC2	QC3	QC1	QC2	QC3	QC1	QC2	QC3
AEA	−7.5	3.5	−10.3	2.2	−10.9	−3.9	0.7	2.6	−2.6	1.8	−5.2	7.7
2-AG	1.8	−5.5	39.5	−1.8	−6.1	−13.5	0.0	1.7	−3.0	14.3	5.4	4.8
OEA	9.1	−15.9	8.0	−11.0	6.9	−2.2	−1.0	−4.2	2.8	−0.3	−2.7	5.9
PEA	5.0	−0.2	3.0	−8.7	−4.4	−5.1	−6.0	2.8	25.4	2.1	12.4	14.4
CBD	−7.9	−2.9	−7.5	10.0	12.8	23.2	−24.2	−11.5	13.4	14.6	1.9	−14.9
Δ9-THC	−18.6	3.6	−10.2	−3.3	5.3	5.8	−3.3	−0.8	−10.7	12.7	8.6	4.5
Δ9-THC-COOH	7.5	−1.8	10.3	−3.2	−33.7	6.3	−5.3	−3.8	11.9	13.6	8.5	9.3

Data are expressed as mean deviation (%) from initial reference. Deviations considered significant are illustrated in bold (>±15%).