precision thread headspace gas chromatography with writing space DWK Life Sciences

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Mar 21, 2021 · Gas chromatography (GC) is a very commonly used chromatography in analytic chemistry for separating and analyzing compounds that are gaseous or can be vaporized without decomposition. Because of its simplicity, sensitivity, and effectiveness in separating components of mixtures, gas chromatography is an important tools in chemistry.

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Healthy patients (n = 15), subjects with submandibular abscesses located in fascial deep space (n = 10), and subjects with halitosis (n = 5) were enrolled in the study. Saliva samples were subjected to headspace solid-phase microextraction (HS-SPME) and gas chromatography coupled to mass spectrometry (GC/MS) analysis.

An analysis of terpenes is typically done via headspace—gas chromatography—mass spectrometry (HS-GC-MS). Herein, a 1.1 mm 120 µm divinylbenzene (DVB)/PDMS SPME Arrow was used to analyze the terpene content in Humulus lupulus (hops), and individual terpene responses were compared to that of a HS-syringe method typically used for this

Oct 10, 2020 · To do this, each microcosm was placed in a modified 500 mL mason jar to create a chamber headspace. Through a drilled hole on the jar's lid, a Wheaton®, sleeve stopper (DWK Life Sciences, Milville, New Jersey, US) for multi-puncture applications was attached by a silicone sealant.

Headspace sampling is essentially a separation technique in which volatile material may be extracted from a heavier sample matrix and injected into a gas chromatograph for analysis. To appreciate the principle, let’s consider an application that is well suited for headspace sampling: perfume.

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Headspace gas chromatography (HSGC) is the most favored technique for the analysis of volatiles and semi volatile organics in solid, liquid, gas samples 3, 4, 5, 6, 7.

Sep 10, 2002 · Recent developments and trends in the use of headspace sampling with gas chromatography (GC) are reviewed and discussed. A brief overview of headspace analysis techniques and theory references is provided, followed by publication trend data on the various headspace-analysis techniques.

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Mar 01, 2021 · Moreover, MVOCs have been quantified in vivo by sampling the headspace (HS) of human urine using SPME coupled with gas chromatography selective-reagent ionization time-of-flight mass spectrometry (Mochalski and Unterkofler, 2016). A need exists for a robust, sensitive, and reliable analytical method to quantify MVOCs in human biological samples.

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Gas chromatography–mass spectrometry (GC-MS) is a technique which allows detection of VOCs from different niches, including breath, tissues, saliva, or bacteria [18,19,20,21,22,23]. Solid phase microextraction (SPME) in headspace (HS) variant is a commonly used method for extraction and enrichment of VOCs from many biological matrices [24,25