Essays about: "UPLC-MS MS"

Showing result 11 - 15 of 25 essays containing the words UPLC-MS MS.

  1. 11. Occurrence of per- and polyfluorinated alkyl substances (PFAS), including ultra-short-chain compounds. Seasonal variation in rainwater from the Swedish west coast

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Felicia Jansson; [2019]
    Keywords : PFAS; rainwater; ultra-short chain PFAS; atmospheric transport; wet deposition;

    Abstract : Per- and polyfluoroalkyl substances (PFAS) are a group of highly fluorinated compounds which comprises of more than 4700 substances. A smaller number of those substances is rou-tinely measured, usually the short (C4-C7) and long chain PFAS (>C7). READ MORE

  3. 12. A study to understand the information gap between total organofluorine analysis and total oxidizable precursor assay on polyfluoroalkyl/perfluoroalkyl substances (PFASs)

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Pontus Larsson; [2018]
    Keywords : ;

    Abstract : Total oxidizable precursor (TOP) assay is an oxidation method to convert precursor compound of polyfluoroalkyl/perfluoroalkyl substances (PFASs) into measurable perfluorinated carboxylic acids (PFCAs). A previous mass balance study has shown that a loss of fluorine was observed after employing the method to convert the precursors in firefighting foams. READ MORE

  4. 13. An assessment of thermal desorption as a remediation technique for per- and polyfluoroalkyl substances (PFASs) in contaminated soil

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Anna-Stina Lind; [2018]
    Keywords : Thermal desorption; per- and polyfluoroalkyl substances; PFASs; PFBA; PFPeA; PFHxA; PFHpA; PFOA; PFNA; PFDA; PFUnDA; PFBS; PFHxS; PFOS; 6:2 FTSA; 8:2 FTSA; FOSA; PCB; PAH; UPLC MS MS; Termisk rening; Per- och polyfluoralkylsubstanser; PFASs; PFBA; PFPeA; PFHxA; PFHpA; PFOA; PFNA; PFDA; PFUnDA; PFBS; PFHxS; PFOS; 6:2 FTSA; 8:2 FTSA; FOSA; PCB; PAH; UPLC MS MS;

    Abstract : Per- and polyfluoroalkyl substances (PFASs) are a diverse group of persistent organic pollutants. PFASs have a wide area of applications such as stain repellent for paper, textile, furniture and industrial products such as aqueous film forming foams (AFFFs) used for firefighting. READ MORE

  5. 14. Microbial binding of per- and polyfluorinated alkyl substances (PFASs) : - Analysis of PFASs in microbes with ultra-performance liquid chromatography – tandem mass spectrometry (UPLC-MS/MS)

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Karolina Majdak; [2018]
    Keywords : PFASs; microbes; microbial binding; PFOS; PFHxS; AFFFs.;

    Abstract : Per- and polyfluorinated alkyl substances (PFASs) belong to a large group of man-made chemicals that pollute the environment. Perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) are the most commonly found PFASs. The pollution of PFASs can be caused among others by using of aqueous fire-fighting foams (AFFFs). READ MORE

  6. 15. Development of UPLC-MS/MS method for the determination of polar metabolites

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Gustav Norin; [2018]
    Keywords : UPLC-MS MS; HILIC; TMAO; betaine; method development;

    Abstract : Trimethylamine-n-oxide (TMAO) is a metabolite found in plasma/serum in humans. Elevated levels of TMAO have been associated with several types of heart disease. It’s therefore of interest to make a simple analytical method to analyse TMAO and other metabolites that are degraded to TMAO, including betaine. READ MORE