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GC Analysis of Phthalate Esters in Corn Oil (Spiked) on SLB®-5ms after SPME with a 100 μm PDMS Fiber

GC Analysis of Phthalate Esters in Corn Oil (Spiked) on SLB®-5ms after SPME with a 100 μm PDMS Fiber suitable for GC, application for SPME

Materials

analytical column

Product No.
Description
Pricing

SLB®-5ms Capillary GC Column

L × I.D. 20 m × 0.18 mm, df 0.18 μm

SPME fiber

Product No.
Description
Pricing

SPME fiber assembly Polydimethylsiloxane (PDMS)

df 7 μm(PDMS, needle size 24 ga, for use with manual holder

SPME fiber assembly Polydimethylsiloxane (PDMS)

df 100 μm(PDMS, for use with autosampler, needle size 23 ga

SPME fiber assembly Polydimethylsiloxane (PDMS)

df 100 μm(PDMS, needle size 24 ga, for use with manual holder

related product

Product No.
Description
Pricing

Vials, screw top, clear glass (vial only)

volume 15 mL, clear glass vial, thread for 18-400, pkg of 100 ea

Screw cap, phenolic, with open center

black phenolic hole cap, for use with 15 mL vial with 18-400 thread, pkg of 100 ea

Septa, tan PTFE/silicone

white tan PTFE/silicone, diam. × thickness 16 mm × 0.090 in., for use with 15 mL vial, pkg of 100 ea

SPME Fiber Holder

for use with manual sampling

SPME Fiber Holder

for use with CTC CombiPAL and Gerstel MPS2

standard

Product No.
Description
Pricing

Diphenyl phthalate

PESTANAL®, analytical standard

Dicyclohexyl phthalate

PESTANAL®, analytical standard

Bis(methylglycol) phthalate

analytical standard

Dimethyl phthalate solution

certified reference material, 5000 μg/mL in methanol

Bis(2-ethylhexyl) phthalate

certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland

Dibutyl phthalate

certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland

Diisobutyl phthalate

certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland

CONDITIONS

sample/matrix

corn oil spiked with phthalate esters at 500 μg/kg

SPME fiber

100 μm PDMS (57300-U)

extraction

headspace, 95 °C (measured in headspace)

desorption process

260 °C for 4 min

column

F.S. CAP. SLB-5ms 20 m x 0.18 mm I.D., 0.18 μm (28564-U)

oven

60 °C (1 min), 10 °C/min to 330 °C (10 min)

inj. temp.

260 °C

carrier gas

helium, 0.6 mL/min, constant

liner

0.75 mm I.D. SPME

sample

Corn oil

Description

Analysis Note

In this application, SPME was used for the analysis of phthalate esters from oily samples, specifically the oil-based flavor packets included with ramen noodle kits. Spiked samples of corn oil and flavored oils included with ramen noodle kits were analyzed using high temperature SPME headspace extraction using a 100 μm PDMS fiber which was then directly desorbed into the GC/MS system. Calibration standards were prepared in corn oil, and spiked samples of chicken and beef oil-based flavors were analyzed. The SLB-5ms GC columns provide consistently low-bleed, inert, efficient, and durable separations.

Legal Information

SLB is a registered trademark of Merck KGaA, Darmstadt, Germany