Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"XAD-2"”.
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Développement de méthodes analytiques par chromatographie en phase gazeuse et chromatographie en phase liquide à haute performance pour le fenitrothion et sept de ses dérivés de l'eau et du sol à l'aide des résines XAD 2, 4 et 7
… de ses dérivés à l'aide des résines Amberlite(R) XAD a été étudié en utilisant la chromatographie en phase gazeuse (CPG) et la chromatographie en phase liquide à haute performance (CLHP) comme moyens d'analyse. Les synthèses du S-méthylfénitrothion, du formylfénitrothion, de l'aminofénitrothion, …
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Ungesättigte Dithioetherliganden : selektive Extraktionsmittel für die Gewinnung von Palladium(II) aus Sekundärrohstoffen
… Kieselgel und organophilem Amberlite® XAD 2 adsorbiert. Die Oligo(dithioether)-Liganden basieren auf 1,2-Dithiobenzen oder 1,2-Dithiomaleonitril-Einheiten, welche über Tris(oxyethylen)ethylen- oder Trimethylen-Brücken miteinander verknüpft sind. Mit Hilfe von Batch-Versuchen konnte …
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Combustion emissions from conventional boiler firing coal and tire derived fuel
… with an ENERAC 2000 gas analyzer. Supelco XAD-2 resin was used in the modified method 5 sampling train to adsorb nonpolar, vapor phase hydrocarbons. The XAD-2 resin was extracted and the wash concentrated before High Performance Liquid Chromatography (HPLC) was used to quantify the presence …
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Fate of Current-use Pesticides in the Canadian Atmosphere
… transport (LRT). We have applied and refined an XAD-2 resin-based passive air sampler (PAS) to study the concentrations of pesticides in the atmosphere. A set of laboratory experiments measured the equilibria sorption coefficients for chemicals on XAD-2 resin, allowing the determination of a new …
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Identifying iron-binding antioxidants in New Zealand honeydew honey
… of the antioxidants was first attempted with XAD-2 resin. The results of solid phase extraction using XAD-2 resin showed that the activity is mainly found in the honey effluent, the fraction not retarded by the resin, indicating that hydrophilic components contributed to the iron-binding …
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Effect of canopy manipulation and fermentation on grape aroma components
… on those components. A polymeric styrene resin (XAD-2) was evaluated for its ability to absorb and desorb five monoterpene alcohols, three monoterpene hydrocarbons, four monterpene oxides, two aromatic alcohols and a glucopyranoside from White Riesling juice at two different pH values. The …
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Profiling of urinary metabolites in human pregnancy
… by adsorption onto a neutral resin (Amberlite XAD-2). Steroid conjugates were hydrolyzed by enzymes from the digestive juice of the snail, Helix pomatia. Purified urinary organic acid and steroid extracts were methoximated and trimethylsilylated for gas-chromatographic analysis. Urinary acid …
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Atmospheric Distribution and Seasonality of Airborne Polyfluorinated Compounds: Spatial and Temporal Concentration Variations from Ship-and Land-Based Measurements in Northern Germany, the Atlantic Ocean, and Polar Regions
… (Gasphase), hier Polyurethanschaum und XAD-2, angereichert. Neutrale volatile PFC wurden mit Aceton:Methyl-tert-butylether (1:1) extrahiert und mittels GC-MS detektiert. Perfluorierte Säuren wurden mit Methanol extrahiert und mit HPLC-MS/MS detektiert. Die optimierte Methode wurde …
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Enzyme-Linked Electrochemical Detection of Urinary Sarcosine
Biomarker-based diagnostics are crucial for the early detection of prostate cancer (PCa). One such biomarker that may be useful in PCa diagnostics is urinary sarcosine (N-methylglycine). However, its utility is confounded by several factors: the small differences in metabolite concentration that …