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Peaks | tR (min) | mg/g* | |
---|---|---|---|
1. | Cannabidiolic acid (CBDA) | 2.142 | 0.2 |
2. | Cannabigerol (CBG) | 2.405 | 0.2 |
3. | Cannabidiol (CBD) | 2.535 | 0.2 |
4. | Cannabinol (CBN) | 3.776 | 0.2 |
5. | Δ9-Tetrahydrocannabinol (Δ9-THC) | 4.753 | 0.2 |
6. | Tetrahydrocannabinolic acid A (THCA-A) | 6.279 | 0.2 |
Column | Raptor ARC-18 (cat.# 9314A62) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dimensions: | 150 mm x 2.1 mm ID | ||||||||||||
Particle Size: | 2.7 µm | ||||||||||||
Pore Size: | 90 Å | ||||||||||||
Guard Column: | Raptor ARC-18 EXP guard column cartridge 5 mm, 2.1 mm ID, 2.7 µm (cat.# 9314A0252) | ||||||||||||
Temp.: | 30 °C | ||||||||||||
Standard/Sample | Cannabinoids standard (cat.# 34014) | ||||||||||||
Cannabigerol (cat.# 34091) | |||||||||||||
d9-Tetrahydrocannabinol (cat.# 34067) | |||||||||||||
d9-Tetrahydrocannabinolic acid A (cat.# 34111) | |||||||||||||
Diluent: | 75:25 Acetonitrile:water | ||||||||||||
Conc.: | Expected concentration of 4 ppm in final extract from gummy initially spiked at 0.2 mg/g. | ||||||||||||
Inj. Vol.: | 2 µL | ||||||||||||
Mobile Phase | |||||||||||||
A: | Water, 5 mM ammonium formate, 0.1% formic acid | ||||||||||||
B: | Acetonitrile, 0.1% formic acid | ||||||||||||
|
Detector | UV/Vis @ 228 nm |
---|---|
Instrument | UHPLC |
Sample Preparation | Gummies were manually chopped into small pieces, and 1 g of sample was weighed in a 50 mL polypropylene tube. The sample was mixed with 5 mL of water and then vigorously vortexed until all gummy pieces were fully solubilized. The sample was fortified with cannabinoids at 0.2 mg/g. The spiked sample was further vortexed for 30 sec. 5 mL of acetonitrile acidified with 1% acetic acid was added to the sample, and this was followed by 30 sec vortex agitation. Then, a pouch of European EN 15662 QuEChERS extraction salts (cat.# 25849) was added to the sample. The sample was vortexed for 30 sec and then centrifuged for 5 min. 100 µL of organic extract was mixed with 900 µL of 75:25 acetonitrile:water. 2 µL of final extract was injected into the HPLC-UV system. |
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