Pure Chromatography
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Terpene Profile of Thyme on Rxi-624Sil MS by FET-HS-GC
Peaks | tR (min) | |
---|---|---|
1. | p-Cymene![]() | 8.75 |
2. | γ-Terpinene![]() | 9.06 |
3. | Linalool![]() | 9.87 |
4. | dl-Menthol | 11.08 |
5. | Borneol![]() | 11.19 |
Peaks | tR (min) | |
---|---|---|
6. | α-Terpineol![]() | 11.29 |
7. | Dihydrocarveol![]() | 11.40 |
8. | β-caryophyllene![]() | 13.83 |
9. | α-Humulene![]() | 14.21 |
10. | Caryophyllene oxide![]() | 15.92 |

GC_FS0520
Column | Rxi-624Sil MS, 30 m, 0.25 mm ID, 1.40 µm (cat.# 13868) |
Sample | |
Conc.: | 20 mg of ground thyme |
Injection | headspace-loop split (split ratio 10:1) |
Liner: | Premium 1.0 mm ID straight inlet liner (cat.# 23333.1) |
Headspace-Loop | |
Inj. Port Temp.: | 250 °C |
Instrument: | Tekmar HT-3 |
Inj. Time: | 1.0 min |
Transfer Line Temp.: | 160 °C |
Valve Oven Temp.: | 160 °C |
Needle Temp.: | 140 °C |
Sample Temp.: | 140 °C |
Sample Equil. Time: | 30.0 min |
Vial Pressure: | 20 psi |
Loop Pressure: | 15 psi |
Oven | |
Oven Temp.: | 60 °C (hold 0.10 min) to 300 °C at 12.50 °C/min (hold 3.0 min) |
Carrier Gas | He, constant flow |
Linear Velocity: | 33 cm/sec |
Detector | FID @ 320 °C |
Make-up Gas Flow Rate: | 45 mL/min |
Make-up Gas Type: | N2 |
Hydrogen flow: | 40 mL/min |
Air flow: | 450 mL/min |
Data Rate: | 20 Hz |
Instrument | Agilent/HP6890 GC |
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