Human body odor discrimination by GC-MS spectra data mining was written by Jha, Sunil Kr.;Marina, Ninoslav;Liu, Chuanjun;Hayashi, Kenshi. And the article was included in Analytical Methods in 2015.Reference of 66943-05-3 This article mentions the following:
The present study explores individual identity perception by analyzing the chem. peak information in the gas chromatog.-mass spectrometry (GC-MS) spectra of body odor samples with standard data mining approaches. Mainly, the principal component anal. (PCA) method is chosen for the visual discrimination of the body odor samples in feature space. PCA in combination with the support vector machine (SVM) method is used for quant. recognition. GC-MS characterization confirms the composition of numerous chem. species (aldehydes, acids, ketones, esters, sulfides etc.) in the body odor samples. The GC-MS spectra of body odor samples from the armpit and neck of three people (from dissimilar age groups) at two different sampling times (0 h and 4 h) were recorded in the experiment A few blank (non-body odor) samples were also characterized with GC-MS and included as references in further anal. by the data mining methods. The discrimination efficiency (both qual. and quant.) for the individual body odors was evaluated for (i) three variables of chem. information in the GC-MS spectra (the peak area, peak height and ratio of peak area to height); (ii) two sampling times (0 h and 4 h); and (iii) two sampling parts of the body (the neck and armpit). The best visual discrimination of the individual body odors has been achieved using the peak height as a variable for the neck odor with a sampling time of 4 h. This result has been established with class separability measures calculated with principal component (PC) scores and SVM classification outcomes (86%). In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3Reference of 66943-05-3).
1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.Reference of 66943-05-3
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem