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GC COLUMNS |
APPLICATION-SPECIFIC COLUMNS
Foods, Flavors, & Fragrances
Pesticide Analysis in Cannabis
Rxi®-5Sil MS Columns
(fused silica)
(low-polarity phase; Crossbond® 1,4-bis(dimethylsiloxy)phenylene dimethyl polysiloxane)
• Engineered to be a low-bleed GC-MS column.
• Excellent inertness for active compounds.
• General-purpose columns—ideal for GC-MS analysis of semivolatiles, polycyclic
aromatic compounds, chlorinated hydrocarbons, phthalates, phenols, amines,
organochlorine pesticides, organophosphorus pesticides, drugs, solvent impurities,
and hydrocarbons.
• Temperature range: -60 °C to 350 °C.
Rxi®-5Sil MS Structure
95%
5%
CH
3
CH
3
Si
O
O
CH
3
CH
3
Si
CH
3
CH
3
Si
similar phases
DB-5ms, DB-5msUI, VF-5ms, ZB-5ms,
ZB-SemiVolatiles, Rtx-5Sil MS
30-Meter
ID
df
temp. limits
cat.#
price
0.25 mm 0.25 µm -60 to 320/350 °C
13623
0.50 µm -60 to 320/350 °C
13638
Rxi®-5Sil MS with Integra-Guard®
• Extend column lifetime.
• Eliminate leaks with a built-in retention gap.
• Inertness verified by isothermal testing.
Description
qty.
cat.#
price
30 m, 0.25 mm ID, 0.25 µm Rxi-5Sil MS w/5 m Integra-Guard Column
ea.
13623-124
30 m, 0.25 mm ID, 0.50 µm Rxi-5Sil MS w/5 m Integra-Guard Column
ea.
13638-124
Marijuana Pesticides by GCxGC on Rxi®-5Sil MS and Rtx®-200
GC_FF1205
Column
: Rxi®-5Sil MS 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623); Rtx®-200 1.3 m, 0.25 mm ID, 0.25 µm (cat.# 15020);
Sample:
Diluent: Toluene;
Injection:
Inj. Vol.: 1 µL splitless (hold 1 min); Liner: Sky®
4 mm single taper w/wool (cat.# 23303.1); Inj. Temp.: 250 °C; Purge Flow: 40 mL/min;
Oven:
Oven Temp.: Rxi®-5Sil MS: 80 °C (hold 1 min) to 310 °C at 5 °C/min; Rtx®-200: 85 °C (hold 1 min) to 315 °C
at 5 °C/min;
Carrier Gas:
He, corrected constant flow (2 mL/min);
Modulation:
Modulator Temp. Offset: 20 °C; Second Dimension Separation Time: 3 sec; Hot Pulse Time: 0.9 sec; Cool Time between
Stages: 0.6 sec;
Detector:
TOFMS; Transfer Line Temp.: 290 °C; Analyzer Type: TOF; Source Temp.: 225 °C; Electron Energy: 70 eV; Mass Defect: -20 mu/100 u; Solvent Delay Time: 5 min; Tune Type:
PFTBA; Ionization Mode: EI; Acquisition Range: 45-550 amu; Spectral Acquisition Rate: 100 spectra/sec;
Instrument:
LECO Pegasus 4D GCxGC-TOFMS;
Notes:
Rtx®-200 (cat.# 15020) is a 15 m column.
A 1.3 m section was used as the second dimension column.
For a peak list, visit
www.restek.comand enter chromatogram GC_FF1205 in the search function.
Similar to: (5%-phenyl)-methylpolysiloxane
Growing Analytical
Solutions for Medical
Cannabis Labs
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