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The treatment of a synthetic polluted gas containing seven volatile organic compounds (VOCs) was studied using a pilot plant in real industrial conditions. The process combined VOC absorption in silicone oil (PolyDiMethylSiloxane, i.e., PDMS), a biological regeneration of the PDMS in a two-phase partitioning bioreactor (TPPB), and a phase separation including settling and centrifugation.
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Volatile Organic Compounds (VOC) Analysis | Thermo Fisher . Within a sample vial the unoccupied area above the sample is commonly referred to as the head space. Using static headspace, sealed vials containing sample are gently heated to drive VOC compounds out of the sample matrix into equilibrium with the gas phase.
Jun 03, 2015 · The carboxen-divinylbenzene-polydimethylsiloxane (CAR-DVB-PDMS) SPME fiber (film thickness, 50/30 µm) was used because it was most efficient among the various types of fiber for most volatile organic compounds [6,35]. The SPME fiber was exposed to the headspace above the H. cordata Thunb sample vial at 26 °C for 1 h. After adsorption, the
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Mar 01, 2018 · Three machine learning algorithms were used to identify the most highly discriminatory volatile metabolites and predict the class (i.e., cells infected with virus versus uninfected cells) to which samples in the validation set belonged, namely: random forest (RF) , support vector machines with a linear kernel (linear SVM) , and partial least
Jun 18, 2022 · Thus, the new model for simulating headspace solid-phase microextraction of volatile organic compounds from water samples with porous coatings was developed using finite element analysis platform COMSOL Multiphysics®. The model is mainly based on existing theory and previous research on the numerical modeling of SPME.
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groundwater sample s where preservation with copper sulfate had been used. For a full discussion of the merits of various VOC preservation techniques, refer to Appendix A of Draft EPA Method 5035A, “The Collection and Preservation of entitled Aqueous and Solid Samples for Volatile Organic Compound (VOC) Analysis”.