Capillary microextraction of volatiles device for enhanced BTEX vapors sampling based on a phenyl modified PDMS sol-gel adsorption phase

A needle trap device packed with MIL‐100(Fe) metal organic frameworks for efficient headspace sampling and analysis of urinary BTEXs

“…Dynamic headspace GC-PID 0.015-0.035 0.030-0.060 9.5% Karačonji & Skender (2007) Headspace-purge and trap GC-PID 0.015-0.035 0.050-0.075 10.0% (Brči c & Skender, 2003) Headspace-PDMS-SPME GC-MS 0.035-0.050 0.050-0.08 11.0% (Karačonji & Skender, 2007) Headspace-CAR-PDMS-SPME GC-FID 0.002-0.010 0.003-0.012 13.0% (Gomes et al, 2010) Headspace-Ph, PDMS-CMV GC-MS 0.001-0.006 0.005-0.013 5.0% (Gura et al, 2018) Headspace-CF, CAR-PDMS-SPME GC-FID 0.0002-0.0007 0.007-0.02 9.6% (Tajik et al, 2017) Headspace-MIL-NTD GC-FID 0.0001-0.0005 0.0003-0.0014 7.6% Present RSD, Relative standard deviation; GC, gas chromatography; PID, photo ionization detector; PDMS, polydimethylsiloxane; SPME, solid-phase micro-extraction; MS, mass spectrometry; CAR, carboxen; FID, flame ionization detector Ph, phenyl; CMV, capillary microextraction of volatile; CF, cold fiber; NTD, needle trap device. previous studies for headspace extraction of BTEXs from the urine matrix.…”

“…Thus far, various analytical methods, such as dynamic headspace (Karačonji & Skender, 2007), headspace purge and trap (Brči c & Skender, 2003), headspace solid-phase micro-extraction (Gomes, D'Andrea, Mendes, & de Siqueira, 2010;Gura, Tarifa, Mulloor, Torres, & Almirall, 2018;Karačonji & Skender, 2007) and cooling/heating headspace solid-phase micro-extraction (Tajik, Bahrami, Ghiasvand, & Shahna, 2017), have been used for the determination of urinary BTEXs. solid-phase micro-extraction as a solvent-less, onestep, fast and cost-effective method has been used for the extraction and analysis of VOCs in urine.…”

Predicting the Geographic Origin of Heroin by Multivariate Analysis of Elemental Composition and Strontium Isotope Ratios

“…A set of three CMV devices were prepared and assembled in the laboratory according to the protocol described previously [90,91]. All analyses were performed using the previously described CMV-A formulation [92]. First, CMVs were preconditioned in an oven at 250°C and desorbed in the GC inlet as a blank.…”

“…Sampling was performed at 0.2 L/min for 10 minutes for a total of 2 L of air sampled. These parameters were selected on the basis of the results of previous experiments using the CMV for extracting volatiles in ambient air [92,97]. Immediately after pumping, the CMVs were placed in the thermal desorption probe and inserted into the GC inlet for analysis.…”

“…The CMV device was developed from the principles of solid phase micro-extraction (SPME) wherein a fiber coated with polydimethylsiloxane (PDMS) is allowed to passively absorb volatile organic compounds (VOCs) from the headspace volume in a closed contained [88,89]. Chemical modifications to the sol-gel formula (Phenyl-PDMS versus the original PDMS) enabled tuning of the CMV device for improved sampling efficiency of more volatile organic compounds; the formula described was utilized in this application for sampling heroin headspace VOCs [92].…”