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Showing 1 to 20 of 26 for “"Headspace Solid-phase Microextraction"”.

  1. The Effect of Wine Matrix Ingredients on 3-Alkyl-2-methoxypyrazines Measurements by Headspace Solid-Phase Microextraction (HS-SPME)

    Hartmann, Peter J.Virginia Tech2002

    … of wine matrix ingredients and conditions on the headspace (HS) sampling of 3-alkyl-2-methoxypyrazines was investigated with solid-phase microextraction (SPME) and capillary gas chromatography, using a nitrogen phosphorus detector. Changes in the recovery of 3-ethyl-, isopropyl-, sec-butyl-, and …

    vt Repository record

  2. Development of a headspace solid-phase microextraction (HS-SPME) procedure for the determination of short-chain fatty acids (SCFAs) in activated sludge by GC-FID

    Cheng, Shiyan

    … treatment includes the removal of inorganic solids such as sand and gravel as well as organic materials, phosphorus, and nitrogen. Activated sludge, containing a variety of living organisms, is added into the wastewater treatment system. Short-chain fatty acids (SCFAs), an energy source of …

    emich Repository record

  3. Profile of Missouri Norton wine aroma using solid phase microextraction of headspace, gas chromatography-olfactometry, mass spectrometry

    Monson, SteveUniversity of Missouri--Columbia2011

    … of volatile compounds was performed using headspace solid-phase microextraction (HS-SPME) and identified by a trained panel. The samples were then diluted to determine the most important odor active compounds, resulting in thirty one compounds responsible for the nine most common …

    missouri Repository record

  4. Effect of Training Systems on Viognier (Vitis vinifera L.) Grape and Wine Glycosides and Volatile Compounds

    Millard, Lindsay TheresaVirginia Tech2005

    … Seventeen volatile compounds were analyzed using headspace solid-phase microextraction, GC-MS. Fruit showed differences in linalool, á-terpineol, â-damascenone, and n-hexanol concentrations among the training systems. Wines showed differences in both grape-derived and fermentation-derived …

    vt Repository record

  5. Naujų mikroekstrakcijos sistemų kūrimas, tyrimas ir taikymas lakių aromatinių angliavandenilių nustatymui /

    Pusvaškienė, Edita,Institutional Repository of Vilnius University2011

    A new solid phase microextraction system composed of nanotubes coating fixed on a stainless steel support is suggested. Thermal stability and selectivity of the system was examined. It was determined that the system can be used for direct and headspace extraction of volatile aromatic hydrocarbons. …

    vilnius Repository record

  6. Development, investigation and application of new microextraction systems for determination of volatile aromatic hydrocarbons /

    Pusvaškienė, Edita,Institutional Repository of Vilnius University2011

    A new solid phase microextraction system composed of nanotubes coating fixed on a stainless steel support is suggested. Thermal stability and selectivity of the system was examined. It was determined that the system can be used for direct and headspace extraction of volatile aromatic hydrocarbons. …

    vilnius Repository record

  7. The Development and Evaluation of Non-invasive Methods to Characterise the Disease States of Patients Utilising Selective Discrimination, Gas Chromatography-Mass Spectrometry and Chemometrics

    Turner, Diane CoralThe Open University2018

    … was GC-Time-of-Flight-MS coupled with headspace solid-phase microextraction (HS-SPME-GC-ToFMS). A robust and sensitive method was developed by optimisation of all sample analysis parameters and was applied to clinical samples from bladder and prostate cancer patients and those with …

    the-open-u Repository record

  8. Impacts of Water, Extraction Procedure and Origin on Anthocyanins and Volatile Compositions of Hibiscus Extracts and Freeze-Dried Hibiscus

    Ndiaye, OumouleVirginia Tech2016

    … (HPLC). And the volatiles were measured using headspace-solid phase microextraction and gas chromatography-mass spectrometry (HS-SPME-GCMS). Origin and temperature as well as their interaction had significant effects on the anthocyanin contents, with respective p-values of 0.0036 and 0.0025 and …

    vt Repository record

  9. Profiling and putative aroma biomarker identification for flavor in potatoes using a trained sensory panel and HS-SPME GC-MS

    Bough, Raven, author, Jayanty, Sastry, advisor, Holm, David G., advisor, Stone, Martha, committee memberColorado State University. Libraries2017

    … clones). Non-targeted volatile metabolomics with headspace solid-phase microextraction gas chromatography coupled to mass spectrometry (HS-SPME GC-MS) facilitated identification of 42 unique metabolites with significant variation across samples (ANOVA, α=0.05, n=5 technical replicates x 14-15 …

    colostate Repository record

  10. Flavor chemistry of lemon-lime carbonated beverages

    Hausch, Bethany J.University of Illinois at Urbana-Champaign2011

    … beverages were quantified using static headspace solid phase microextraction (SPME) combined with stable isotope dilution assays (SIDA). The compounds chosen for quantification were 2,3-dehydro-1,8-cineole, 1,8-cineole, octanal, nonanal, decanal, linalool, borneol, isoborneol, neral, …

    uiuc Repository record

  11. Flavor and Quality Characteristics of Two Primocane-bearing Blackberry Cultivars as Impacted by Foliar and Shade Application

    Xu, TianyouVirginia Tech2023

    … in blackberries were identified by use of headspace-solid-phase microextraction-gas chromatography-mass spectrometry-olfaction (HS-SPME-GC-MS-O). Shade cloth significantly reduced the white drupelet disorder (WDD) in Prime-Ark® Freedom but it also reduced the total soluble solid content …

    vt Repository record

  12. Measuring and modeling geosmin removal from Horsetooth Reservoir water by powdered activated carbon for selected contact times

    Koester, Kirk, author, Omur-Ozbek, Pinar, advisor, Carlson, Ken, committee member, Goemans, Chris, committee memberColorado State University. Libraries2011

    … and the geosmin removal was determined by headspace solid phase microextraction and gas chromatography/mass spectrometry. Results indicated that 50 to 70% removal was achieved for lower doses of geosmin/PAC combinations, and 80 to 97% removal was achieved for higher PAC dose combinations. …

    colostate Repository record

  13. Emergence and fate of iodinated organic compounds and disinfection by-products during biological treatment of oil and gas produced water

    Almaraz, NohemiColorado School of Mines. Arthur Lakes Library2018

    … and triiodomethane were measured by headspace solid-phase microextraction gas chromatography mass spectrometry at concentrations up to 16.6 μg/L, 442 μg/L, and 4,316 μg/L, respectively. Triiodomethane, an iodinated disinfection byproduct (I-DBP), was the IOC that was predominantly …

    colo-mines Repository record

  14. Detection of Illicit Drugs in Various Matrices Via Total Vaporization Solid-Phase Microextraction

    Davis, Kymeri Elizabeth2019

    In Headspace Solid-Phase Microextraction (Headspace SPME), a sample is heated to encourage a portion of the analyte into the headspace of a vial. A coated fiber is introduced into the sample headspace and the analyte is adsorbed onto the fiber coating. Total Vaporization Solid-Phase Microextraction …

    iupui Repository record

  15. Identification of Tobacco-Related Compounds in Tobacco Products and Human Hair

    Rainey, Christina2014

    … by ultrasonic extractions, derivatization, and headspace solid phase microextraction (SPME) with analysis by gas chromatography-mass spectrometry (GC-MS). The results show that the compounds present are nicotine, flavoring compounds, humectants and binders. Humectant concentrations vary among …

    iupui Repository record

  16. The Role of Blackberry Grades and Fermentation Methods on Blackberry Kombucha Quality and Aroma Characteristics from Small-Scale Fermentation

    Holst, Alisa SheaVirginia Tech2025

    … pH, titratable acidity (TA), and total soluble solids (TSS), followed by aroma analysis using headspace-solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry-olfactometry (GC-MS-O). Then, a blackberry kombucha product was made, in biological triplicates, with either U.S. …

    vt Repository record

  17. Physicochemical and aroma characterization of Arbutus pavarii honey

    Hwisa, Nagiat TayebUniversity of Illinois at Urbana-Champaign2021

    … flavor evaporation (CLLE/SAFE) and by headspace-solid phase microextraction (HS-SPME). The volatile aroma components were identified by gas chromatography olfactometry (GC-O) and gas chromatography mass spectrometry (GC-MS) analytical methods and confirmed by authentic standards. The …

    uiuc Repository record

  18. Comprehensive Mapping of Volatile Organic Compounds in Fruits

    Ghaste, Manoj ShahajiUniversità degli studi di Trento2015

    … and origin. The experiment was carried out using headspace solid-phase microextraction (HS-SPME) and gas chromatography mass spectrometry (GC-MS) based approach and according to metabolomics protocols. A customized dataset of reference standards (>350) was generated and, an automated pipeline for …

    trento Repository record

  19. Sensorial, cultural and volatile properties of dairy powders, yoghurt and butter from pasture and non-pasture cow diets

    Zeng, ChengUniversity College Cork2022

    … associated with lipid oxidation.The ability of headspace solid phase microextraction, thermal desorption, and high capacity sorptive extraction as a direct immersion and headspace extraction technique were compared with and without salting out and by a polar and non-polar gas chromatograph …

    cork Repository record

  20. Physicochemical and flavor characterization of Tupelo honey

    Gardiner, Samantha RachelleUniversity of Illinois at Urbana-Champaign2015

    … same ten samples as described above by static headspace solid phase microextraction (H-SPME). Of the 40 compounds detected, the most important compounds based on their perceived odor intensities determined by two assessors were phenylacetaldehye (rosy) and nonanal (citrus). Further analysis was …

    uiuc Repository record

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