Typically, EI using GC/MS approach provides good interlaboratory reproducibility; the mass spectrum obtained displays highly reproducible and characteristic fragmentation patterns useful for the determination of the chemical structure. Among the API techniques[50](e.g., APCI, APPI and ESI), ESI is t...
All VOCs that were found as p < 0.1 via the Student’s T-test or Wilcoxon’s Rank sum test in both data sets and had low within class variation were identified utilizing Mass Hunter Quantitative Profinder, Mass Hunter Unknown Analysis and the NIST14 mass spectral library. NIST14 was ...
A man-portable membrane inlet mass spectrometer has been built and tested to detect and monitor characteristic odors emitted from the human body and also f
Based on the data in Table 2, a search was conducted in the mass spectrum using the corresponding retention times of each characteristic. The NIST library was utilized (a similarity score higher than 90% between the mass spectral data of the analyzed compound to the its closest hit in the ...
analysed stool samples of autistic spectrum disorder (ASD) children and healthy, age-matched controls for short chain fatty acids, phenols, and ammonia. Those with ASD had higher concentrations of acids than the controls and higher faecal ammonia [14]. De Preter et al. used purge and trap GC...