US EPA Method 8260: GC Analysis of Volatiles on SPB®-624 after Purge & Trap using "K" Trap, Fast GC Analysis
Materials
Analytical column
Standard
EPA 8260A Surrogate Standards Mix
certified reference material, 2000 μg/mL each component in methanolEPA 8240B/8260A Matrix Spike Mix
certified reference material, 2500 μg/mL each component in methanolEPA 8260 Volatiles Calibration Mix
certified reference material, 2000 μg/mL each component in methanolTCL Volatiles Mix
certified reference material, 2000 μg/mL each component in methanol: water (9:1)accessory
Hamilton® syringe, 1000 series GASTIGHT®, PTFE luer lock
1005TLL, PTFE Luer lock, volume 5 mL, needle size (not included)Hamilton® syringe, 1000 series GASTIGHT®, PTFE luer lock
1005SLPT (for Purge & Trap), volume 5 mL, needle size (not included)related product
EPA Vials, white polypropylene screw top hole cap, pre-cleaned and assembled
volume 40 mL, clear glass vial, vial O.D. × H 29 mm × 82 mm, pkg of 72 eaEPA Vials, white polypropylene screw top hole cap, pre-cleaned and assembled
volume 40 mL, amber glass vial, O.D. × H 29 mm × 82 mm, pkg of 72 easample prep
Purge/Trap K Vocarb® 3000
for use with Tekmar® Velocity XPT, LSC-1, LSC-2, LSC-2000, 4000 (Straight, 12 in./30.5 cm, Swagelok fitting), HT-3Purge/Trap K Vocarb® 3000
for use with Tekmar® 3000, 3100 (Straight, 12 in./30.5 cm, Valco fittingCONDITIONS
sample/matrix
each analyte at 50 ppb in 5 mL water
purge trap
VOCARB 3000 K (24940-U)
purge
40 mL/min at 25 °C for 11 min
dry purge
2 min
desorption preheat
205 °C
desorption temp.
210 ºC for 1 min
desorption flow
150 mL/min
bake
260 °C for 10 min
transfer line/valve temp.
110 °C
column
SPB-624, 20 m x 0.18 mm I.D., 1.0 μm (28662-U)
oven
40 °C (1 min), 11 °C/min to 125 °C, 35 °C/min to 230 °C (2 min)
inj. temp.
150 °C
MSD interface
220 °C
scan range
m/z = 35-400
carrier gas
helium, 1.5 mL/min
injection
100:1 split
liner
0.75 mm I.D. SPME
Description
Analysis Note
US EPA Method 8260 describes the analysis of volatile organic compounds in solid wastes and ground waters. This application illustrates the analysis of many compounds commonly analyzed by this method using purge and trap coupled to GC-MS. A short, narrow I.D. SPB-624 column was used to shorten the analysis time to under 11 minutes. A high desorb flow through the trap was necessary to prevent band broadening of the gaseous VOCs. This was accomplished by increasing the split ratio, thus increasing the total flow through the trap during desorb.
Legal Information
SPB is a registered trademark of Merck KGaA, Darmstadt, Germany