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6.7 20 mL headspace vials with aluminum crimp seals and Teflon-faced silicon septa. Store vials in 90°C forced-air oven until ready for use. METHOD 2 — HEADSPACE GC/MS ANALYSIS WITHOUT ...

We report the use of headspace gas chromatography–mass spectrometry (HS-GC/MS) as an acceptable alternative to the use of the Beckman DxC 600. A six-point calibration curve ranging from 10 to 60 mM was analyzed along with controls at 15, 25 and 45 mM.

Sep 05, 2018 · Using reference solutions (b–d), standard calibration vials ranging from 0.5 μg to 6.0 μg per vial are prepared using solvent volumes ranging from 20 to 50 μL. Appropriate volumes of each standard solution are placed into 20 mL headspace crimp-capped vials using PTFE septum and immediately closed prior to the headspace analysis.

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An 8890 gas chromatograph configured with a multimode inlet (MMI), a flame ionization detector (FID), a 5977 single quadrupole mass selective detector (SQ-MSD) with a 9 mm extractor lens, and a headspace sampler was used to generate the data. The data acquisition and analysis were done in GC/MS MassHunter, with the NIST 17

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Jul 01, 2016 · Methods based on SPME represent simpler alternative, but still require complex calibration procedures. The objective of this research was to develop a simpler, low-budget, and accurate method for quantification of BTEX in ambient air based on SPME and GC–MS. Standard 20-mL headspace vials were used for field air sampling and calibration.

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