GC Analysis of Methylcyclohexane Methanol (MCHM) and Propylene Glycol Phenyl Ether (PPH) in Water on VOCOL® after SPME using 100 μm PDMS Fiber
Materials
accessory
Headspace vial, screw top, rounded bottom (vial only)
volume 10 mL, clear glass vial, thread for 18, O.D. × H 22.5 mm × 46 mm, pkg of 100 eaMagnetic Screw Cap for Headspace Vials, 18 mm thread
PTFE/silicone septum (white PTFE/tranparent blue silicone), septum thickness 1.3 mm, pkg of 100 earelated product
used together
SPME Fiber Assembly
100 μm PDMS, Fused Silica (1 cm), needle size 24 ga, Autosampler, pk of 3, red hubCONDITIONS
sample/matrix
MCHM and PPH at 1 μg/L in 6 mL water, 25% sodium chloride
SPME fiber
SPME Assembly, 100 μm PDMS FS, 24 ga, Auto (Red) (57301)
extraction
5 min, headspace at 55 °C, with agitation
desorption process
2 min, 270 °C (splitter open at 0.75 min)
column
Vocol, 20 m x 0.18 mm I.D. x 1.0 μm (28463-U)
oven
50 °C (1 min), 15 °C/min to 220 °C (5 min)
inj. temp.
270 °C
detector
MSD, selected ion mode
MSD interface
220 °C
scan range
selected ion mode; m/z=110, 97 (MCHM) and m/z=94, 152 (PPH)
carrier gas
helium, 1 mL/min constant
injection
SPME
liner
0.75 mm I.D., SPME
Description
Analysis Note
In this application, an SPME method was developed for the analysis of two compounds involved in the chemical spill into the Elk River in West Virginia, which took place in January 2014. The method could easily detect both MCHM and PPH at a level of 1 μg/L from spiked surface water.
Legal Information
VOCOL is a registered trademark of Merck KGaA, Darmstadt, Germany