Sökning: "solid phase extraction"

Visar resultat 1 - 5 av 64 uppsatser innehållade orden solid phase extraction.

1. 1. Selected PFAS in the water treatment at the waste-to-energy plant in Umeå : Investigating concentration and composition of selected PFAS in different water treatment steps

   Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Amanda Carlund; [2023]
   Nyckelord :;

   Sammanfattning : The present study investigated the changes in concentration and composition of five selected PFAS substances in the water treatment at the waste-to-energy plant in Umeå. The five PFAS were PFHxA, PFHpA, PFOA, PFHxS and PFOS. As PFAS exists in a variety of consumer products, they will to some extent end up in waste incineration. LÄS MER

3. 2. Study of the effects of the operating conditions of a decanter centrifuge on a pilot-scale protein recovery setup from cold-pressed rapeseed press cake

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

   Författare :Sergio de La Cruz Padilla; [2023]
   Nyckelord :By-product; Rapeseed press cake; protein; Food engineering; Agriculture and Food Sciences; Technology and Engineering;

   Sammanfattning : There is significant evidence to suggest that diets that include high levels of meat consumption have negative effects on both the environment and human health. As a result, efforts are being made to identify and characterize more plant-based proteins, such as those found in rapeseed. LÄS MER

4. 3. Do selected CF3-containing pharmaceuticals oxidize to trifluoroacetic acid (TFA)? – Analysis of ultra-short perfluoroalkyl acids (PFAAs) and their analytical challenges following oxidation

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

   Författare :Johanna Gillberg; [2022]
   Nyckelord :;

   Sammanfattning : Total oxidizable precursor assay (TOPA) has been used to understand the contribution of unknown precursors to the extractable organofluorine (EOF) compounds. The investigation of compounds containing a CF3 moiety especially connected to an aromatic ring is important because any compounds with such a moiety (pharmaceuticals) may oxidize to form trifluoroacetic acid (TFA). LÄS MER

5. 4. Analysis of non-volatile chemicals from graminoid plants

   Master-uppsats, KTH/Kemi

   Författare :Jakob Flygar; [2022]
   Nyckelord :Liquid Chromatography; Cyperus Rotundus; Panicum Repens; Malaria; Mass spectrometry; Vätskekromatografi; Cyperus Rotundus; Panicum Repens; Malaria; Masspektrometri;

   Sammanfattning : Syftet med denna studie var att utveckla en separations- och analysmetod för identifiering av icke-volatila substanser från strån och rötter av de gräsliknande växterna Cyperus rotundus och Panicum repens. För analysen användes högpresterande vätskekromatografi (HPLC) och ultrahögpresterande vätskekromatografi (UHPLC) med en opolär stationär fas (RP-HPLC) med ultraviolett ljus (UV) och elektrosprej masspektrometri detektion (ESI-MS). LÄS MER

7. 5. Occurrence of organic micropollutants and hormones in Swedish surface water

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Malin Forsberg; [2022]
   Nyckelord :surface water; wastewater; SPE; pharmaceuticals; target analysis; ytvatten; avloppsvatten; SPE; läkemedel; målanalys;

   Sammanfattning : The occurrence and source distribution of organic micropollutants (OMPs) have been investigated in Swedish surface waters, in 23 rivers connected to the lakes Vänern, Vättern and Mälaren, 3 Wastewater treatment plants (WWTPs) and 3 Drinking water plants (DWTPs) located in the middle of Sweden was sampled. Compounds such as pharmaceuticals, industrial chemicals, pesticides, personal care products, hormones, Per- and polyflouroalkyl substances (PFASs), isoflavones, stimulants and parabens were selected. LÄS MER