Sökning: "trace gas method"

Visar resultat 11 - 13 av 13 uppsatser innehållade orden trace gas method.

  1. 11. Qualitative and Quantitative Analysis of Biodiesel Deposits Formed on a Hot Metal Surface

    Master-uppsats, Institutionen för fysik, kemi och biologi; Tekniska högskolan

    Författare :Emilie Westberg; [2013]
    Nyckelord :Fatty Acid Methyl Ester FAME ; Biodiesel deposits; SEM EDS; ATR-FTIR; GCMS;

    Sammanfattning : This thesis aims to investigate the formation of deposits from thermally degraded biodiesel on a hot metal surface under the influence of sodium or copper contaminations. Biodiesel or Fatty Acid Methyl Esters (FAMEs) is a widely utilized biofuel with the potential to replace fossil fuels, however, issues regarding the thermal and oxidative stability prevent the progress of biodiesel for utilization as vehicle fuel. LÄS MER

  3. 12. Method development and applications - hollow fiber SLM extraction of mono and dicarboxylic acids

    Master-uppsats, Lunds universitet/Kemiska institutionen

    Författare :Atif Hussain; [2011]
    Nyckelord :UAE samples; BSTFA; Derivatization; analytisk kemi; HF-LPME; TOPO; DHE; TMS; Chemistry;

    Sammanfattning : A highly sensitive (LOD= 0.04-0.4 ng/ml) method was developed for the detection and quantification of monocarboxylic and dicarboxylic acids (C3 -C10) by GC-MS. These compounds exist in trace amount as essential components of secondary organic aerosols i. LÄS MER

  4. 13. Analysis of some Chlorinated Pesticides in Jordanian Ground- and Surface Waters by Solid-Phase Extraction and Mass Spectrometric Detection- A Method development

    Magister-uppsats, Tema vatten i natur och samhälle

    Författare :Lara Shahin; [2004]
    Nyckelord :Ecology; Decomposition; Jordan; pesticides; PS-DVB; SPE; Ekologi;

    Sammanfattning : A solid-phase extraction (SPE) method was developed for the determination of organochlorine pesticides, namely aldrin, alpha-BHC, beta-BHC, delta-BHC, dieldrin, endosulfan I, endosulfan II, endosulfan sulfate, endrin, endrin aldehyde, lindane, heptachlor, heptachlor epoxide, 4,4’-DDD, 4,4’-DDE and 4,4’- DDT in water. The effect of extraction conditions, such as the addition of sodium chloride and methanol to the sample prior to loading was studied. LÄS MER