V,andlare the nano-orifice’s volume and depth, andmis the molecular mass (inkg) of the gas analyte. More specifically, using (6) for a 490 nm round hole diameter and 250 nm depth, we get a conductance of about 21.7 nL/s for air particles which means, by (4) a throughput at amb...
We investigated the near-infrared spectrum of piperine using quantum mechanical calculations. We evaluated two efficient approaches, DVPT2//PM6 and DVPT2//... J Grabska,KB Be,S Mayr,... - 《Applied Spectroscopy》 被引量: 0发表: 2021年 加载更多站...
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
The time-honored approach to identifying an unknown pollutant involves comparing its EI mass spectrum with those compiled in spectral libraries. There are databases containing hundreds of thousands of EI spectra (e.g., the NIST Mass Spectral Library), but equivalent libraries compiling CID mass spect...
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...
Additionally, signals were detected at m/z 175, 176, 161, and 189 and are also present in the electron ionization mass spectrum of β-caryophyllene available in the NIST library. Finally, a peak was seen at m/z 222.25. The production mechanism for this ion, which is at a higher value ...
14 volatiles with OAV > 1 were accounted as aroma-active compounds, and their variations were distinguished as follows: the highest OAV (786.96) was recorded for methyl 2-methylbutanoate of the ‘No. 26’ line; 2,5-dimethyl-4-methoxy-3(2H)-furanone was superior in the ‘No. 26’ and...