Analysis of Semivolatiles


Translating 0.25 mm ID column method to 0.18 mm ID format results in 32% reduction in analysis time. Resolution of 77 peaks of interest is also maintained for the faster 0.18 mm ID separation.


Column A: DB-5.625 122-5632 30 m x 0.25 mm, 0.50 µm


Column B: DB-5.625 121-5622 20 m x 0.18 mm, 0.36 µm


Carrier: He constant-flow mode 1.1 mL/min Oven:


Injection:


Detector: Agilent 5975C Performance Turbo MSD equipped with 6 mm large-aperture drawout lens, part no. G2589-20045


Splitless 0.5 µL injected at 300°C, QuickSwap pressure 5.0 psi during acquisition, 80.0 psi during backflush with inlet set to 1.0 psi during backflush


40°C (1 min), 25°C/min to 320°C 4.80 min hold


4.00 8.00 12.00 16.00 Time (min)


U.S. EPA Method 8270, 5 ng/mL System Performance Check Compounds Chromatogram using a DB-5.625, 30 m x 0.25 mm, 0.5 µm


B 20.00 24.00 GCHE001 A


4.00


6.00


8.00


10.00 Time (min)


U.S. EPA Method 8270, 5 ng/mL System Performance Check Compounds Chromatogram using a DB-5.625, 20 m x 0.18 mm, 0.36 µm


12.00


14.00


16.00 GCHE002


44


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