Sökning: "NH4 ions"

Hittade 2 uppsatser innehållade orden NH4 ions.

  1. 1. Identifying possible sources of ammonium ions and arsenic in groundwater in the Nam Du area, Vietnam

    L3-uppsats, SLU/Dept. of Soil Sciences

    Författare :Peter Harms-Ringdahl; [2007]
    Nyckelord :groundwater; contamination sources; ammonium ions; arsenic species; redox potential; stable isotopes; Hanoi; Vietnam;

    Sammanfattning : Concentrations of arsenic and ammonium ions well above drinking water standards have been detected in aquifers which supply Hanoi, the capital of Vietnam, with fresh water. Chemical analyses showed arsenic and ammonium ion concentrations varying between 27 – 264 μg/l in freshwater and 1.8 – 34.7 mg/l in groundwater. LÄS MER

  2. 2. Identification and determination of NH4+ ions in D-Ala-NH2∙HCl drug substance by Ion Chromatography (IC)

    Uppsats för yrkesexamina på grundnivå, Malmö högskola/Teknik och samhälle

    Författare :Zenith Khan; Sara Salim; [2005]
    Nyckelord :Identification; determination; NH4 ions;

    Sammanfattning : The quality control laboratory at PolyPeptide has been performing analysis based on ion chromatography (IC) of peptides. A method for separation of negative ions (acetate, chloride etc) is already in use. Lately there has been a need for developing a method to separate positive ions, like ammonium ions, in peptides. LÄS MER