Husen, Peter Tarasov, Kirill Katafiasz, Maciej Sokol, Elena Vogt, Johannes Baumgart, Jan Nitsch, Robert Ekroos, Kim Ejsing, Christer S. Quality control analysis. <p>(<b>A</b>) Monitoring of lock mass offset and lock mass ion intensity as function of sample injection. Notice that the lock mass and internal standard TAG 17:1/17:1/17:1 is not detected in injection 07 and 08. Manual inspection of FT MS spectra revealed that the particular sample had not been spiked with internal standards. (<b>B</b>) Assessing the specificity of the PI species profile and intensity across all samples from wild-type mice and the negative control blank samples. Note that in the negative control blank sample (red) a low abundant background ion is detected and falsely identified as PI 40:3. Dubious lipid species can be removed using background subtraction and filtering during subsequent processing in Orange.</p> 2013-11-07
    https://plos.figshare.com/articles/figure/_Quality_control_analysis_/943435
10.1371/journal.pone.0079736.g004