Sökning: "orbitrap"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet orbitrap.

  1. 1. Qualitative Analysis of Chlorinated Paraffins in Recycled Plastics

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

    Författare :Solal GAUDIN; [2023]
    Nyckelord :Short chain Chlorinated Paraffins SCCP Medium chain Chlorinated Paraffins MCCP Long chain Chlorinated Paraffins LCCP Recycled plastics Qualitative analysis Bioaccumulation Long range transport Gas Chromatography – Mass spectrometry;

    Sammanfattning : Described in many studies as dangerous for the environment and potentially carcinogenic for humans, Chlorinated Paraffins (CPs) are easily widespread due to their substantial production and use in different products. Previous studies reported the presence of CPs in different plastic polymers. LÄS MER

  3. 2. Evaluation of pharmaceutical removal in seven WWTPs : Efficiency of different treatment technologies

    Master-uppsats, Stockholms universitet/Institutionen för miljövetenskap

    Författare :Viktor Munkhammar; [2023]
    Nyckelord :Pharmaceuticals; wastewater treatment plant; removal efficiency; biological treatment; ozonation;

    Sammanfattning : Wastewater treatment plants (WWTPs) are originally not constructed to remove pharmaceuticals from the wastewater. Biological treatment technologies used in many WWTPs today, e.g., activated sludge, MBBR and trickling filters, can, however, remove some pharmaceuticals well. LÄS MER

  4. 3. Evaluation of critical instrument parameters for the transfer of LC-MS quantification methods between LC-MS/MS and Orbitrap MS

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

    Författare :Anna Stepanova; [2023]
    Nyckelord :;

    Sammanfattning : Transferring analytical methods is crucial in chemical laboratories. The need for the transfer may arise for different reasons such as sharing data between different laboratories, replacement or upgrade of analytical instrument, or limited instruments available etc. The performance and sensitivity of different instruments may vary. LÄS MER

  5. 4. Building an in-house spectral library using GCorbitrap HRMS

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

    Författare :Elias Kolsmyr; [2022]
    Nyckelord :Environmental contaminants; Plastic additives; Gas chromatography; High resolution mass spectrometry; Spectral library; MS-DIAL;

    Sammanfattning : There are a great variety of environmentals contaminants, a lot of which are understudied asit is today. The aim of this study was to develop an in-house high-resolution spectral librarycontaining environmental contaminants, with focus on plastic additives. The spectral librarywould then be used to perform suspect screening on real sample extracts. LÄS MER

  7. 5. Non-target screening of sediment samples fromthe Canadian Arctic: comparing two different gas chromatography – high resolution mass spectrometry (GC-HRMS) techniques

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

    Författare :Mathilda Timner; [2022]
    Nyckelord :Arctic marine sediment ׀ GC×GC-HR-ToF-MS ׀ GC-Orbitrap-MS ׀ Identification ׀ Non-target screening ׀ Organic pollutants;

    Sammanfattning : Since the late 18th century, chemicals have been industrially produced, and used by consumers. Today, the number of registered chemicals are over 150 000 in North America and Europe alone, and the number is predicted to increase. LÄS MER