Essays about: "PFOA"

Showing result 1 - 5 of 21 essays containing the word PFOA.

  1. 1. Method development for the analysis of PFAS and neutral precursors in active and passive air samplers

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Pascal Camoiras González; [2019]
    Keywords : ;

    Abstract : Poly- and perfluoroalkyl substances (PFAS) are a chemical class of global concern because of their persistence, toxicity and widespread presence in the environment. This work aimed to develop a robust and reliable method to analyse perfluorohexane sulfonic acid (PFHxS), perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), as well as the neutral volatile PFOS precursors, namely perfluorooctane sulfonamides and perfluorooctane sulfonamidoethanols (FOSAs/FOSEs). READ MORE

  2. 2. Binding of per- and polyfluoroalkyl substances (PFASs) to organic soil horizons of peat and mor : effect of solution chemistry and soil organic matter composition

    University essay from SLU/Dept. of Soil and Environment

    Author : Jennifer Makselon; [2019]
    Keywords : sorption; electrostatic interactions; isotherms; partitioning coefficient; soil organic matter; cation; PFOS; PFOA; desorption;

    Abstract : The understanding of sorption processes of per- and polyfluoroalkyl substances (PFASs) in soils is important for the determination of their fate and transport in the environment. The sorption behavior of PFASs of varying chain length and hydrophilic headgroup was studied in three organic soils, two peat soils and one mor layer, with differing chemical composition of the soil organic matter (SOM). READ MORE

  3. 3. Perfluorooctane sulfonate (PFOS) and related chemicals in eggs from Sweden and China

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Yasmin Karimi; [2019]
    Keywords : PFOS; PFOA; Chicken Egg; LC-MS MS; Organic egg; Conventional egg;

    Abstract : Dietary intake is one of the major routes of human exposure to perfluoroalkyl and/or polyfluoroalkyl substances (PFAS). The objective of this study was to measure perfluorooctane sulfonic acid (PFOS), perfluorooctanoic acid (PFOA) and perfluorohexane sulfonic acid (PFHxS) in organic and conventional egg from Sweden (n=8, consisted of 4 pooled eggs and 4 individuals) and China (n=9, consisted of 4 pooled eggs and 5 individuals) and compare the concentrations of PFAS between the two categories (organic and conventional). READ MORE

  4. 4. Trace level analyses of selected perfluoroalkyl substancesin food: Method development and validation

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Mohammad Sadia; [2019]
    Keywords : ;

    Abstract : To comprise the future requirements to detect low levels of perfluoroalkane acids, includingbranched and linear perfluorooctane sulfonic acid (PFOS), perfluorooctanoic acid (PFOA),and perfluorohexane sulfonic acid (PFHxS) in food items, here analytical methods fordetermination of PFOS, PFOA and PFHxS in six different food matrices (cow milk, butter,chicken egg, chicken meat, beef, and fish) were optimized and validated. The optimizedmethod was based on alkaline digestion and solid-liquid extraction using acetonitrile,followed by solid phase extraction (SPE) using a weak anion exchange cartridge as clean-up. READ MORE

  5. 5. The contribution of 11 measurable Per- and Polyfluoroalkyl substances (PFAS) in extractable organofluorine in Swedish blood samples: a case study

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Daniela Ferrer Esquivel; [2019]
    Keywords : ;

    Abstract : Recent studies have shown increasing levels of unidentified fluorinated compounds, with unknown toxic effects to living organisms. These unidentified fluorinated compounds might be those novel replacements for PFOS and PFOA and some other related chemicals. READ MORE