Sökning: "organic solvent extraction"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden organic solvent extraction.

  1. 1. Analysis of fatty acids in fatty acid-based herbicides by gas chromatography

    Master-uppsats, Lunds universitet/Kemiska institutionen

    Författare :Mohamad Abd Elwadood; [2023]
    Nyckelord :Analytical Chemistry; Fatty Acids; Gas Chromatography; Green Herbicides; Retention Index; Flame Ionization Detector; Mass Spectrometry; Supercritical Carbon Dioxide Extraction.; Chemistry;

    Sammanfattning : Fatty acids-based herbicides are considered to be a green alternative to synthesized weed control products. However, the environmentally sustainable effect of those herbicides needs more investigation to be confirmed. LÄS MER

  3. 2. Analysis of polyfunctional thiols in beer : Developing a novel method of extraction and analysis using GC-FID

    Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)

    Författare :Arvid Lindmark; [2022]
    Nyckelord :Beer; Hops; Thiols; 3MHA; 4MMP; Food Technology; Agriculture and Food Sciences;

    Sammanfattning : In this project, attempts were made to identify and quantify two polyfunctional thiols – 4-mercapto-4-methyl-pentanone and 3-mercaptohexyl acetate – and three monoterpene alcohols – linalool, geraniol, and β-citronellol – in beer samples. In order to avoid the use of hazardous compounds such as dichloromethane and hydroxymercuriobenzoate, common in traditional methods, two novel techniques were tested: a pure liquid-liquid extraction of the beer samples with cyclohexane, and a liquid-liquid extraction with cyclohexane followed by solid phase extraction on silver ion columns. LÄS MER

  4. 3. PHA-framställning från restströmmar med lösningsmedelsextraktion : En energianalys på PHA-produktion med och utan intern värmeintegrering vid extraktion på torr och våt biomassa

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper (from 2013)

    Författare :Fanny Elfving; [2021]
    Nyckelord :PHA; skogsindustriellt avloppsvatten; bioplast; intern värmeintegrering; pinchanslys; CHEMCAD;

    Sammanfattning : Polyhydroxyalkanoater (PHA) är en grupp av polymerer som är biobaserade, biologiskt nedbrytbara och som kan uppvisa varierande fysiokemiska egenskaper. Således har PHA potential att ersätta konventionell och fossilbaserad plast så som polypropylen (PP) och polyetentereftalat (PET). LÄS MER

  5. 4. Separation of Cobalt and Nickel using CYANEX 272 for Solvent Extraction

    Master-uppsats, KTH/Kemiteknik

    Författare :Caroline Kihlbom; [2021]
    Nyckelord :Solvent extraction; cobalt-nickel separation; CYANEX 272; pregnant leach solution; cobalt sulphate; Vätskevätskeextraktion; kobolt-nickel separation; CYANEX 272; laklösning; koboltsulfa;

    Sammanfattning : This project aimed to examine the separation of cobalt and nickel using solvent extraction (SX) with the extractant CYANEX 272 (C272). It was intended to investigate the Co-Ni separation in a sulphate-based leach solution in presence of other contaminants. LÄS MER

  7. 5. Optimization of solid-phase extraction (SPE) as sample preparation for oil samples in forensic investigations.

    Kandidat-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Aamanda Chang; [2021]
    Nyckelord :Solid-phase extraction SPE ; heavy fuel oil HFO ; fingerprint; polycyclic aromatic hydrocarbons PAHs ; biomarkers.;

    Sammanfattning : Oil spills, especially in water have happened throughout the years. The consequences from this kind of incident have always been a threat to marine life and take a lot of money and time to clean up. LÄS MER