This negative chemical ionization mass spectrometry procedure allowed the measurement of C1 C6 aldehydes at low concentrations in mixtures. The characteristic ion signals in the mass spectrum of the mixture were verified by examining the full mass spectra and product ion MS/MS spectra of the ...
Their cor- responding chromatographic profiles are shown in Figure 5A, and the resolved mass spectra together with the stan- dard spectrum of each compound from the NIST MS library are also given in Figure 6A–D. The reliability and accuracy of qualitative analysis were greatly enhanced because ...
As opposed to a quadrupole mass filter in a PTR-MS, the PIT-MS instrument uses an IT-MS, which has the following advantages: (1) the ability to acquire a full mass spectrum in the same time as one mass with a quadrupole and (2) extended analytical capabilities of identifying VOCs by ...
f Method of identification: MS, mass spectrum comparison using NIST14; L, library; RI, RI calculation in agreement with literature value; S, confirmed by authentic standards; O, olfactometric confirmation. g Values represent the peak area ratio of each compound with that of the internal ...