Effect of solvent on the adsorption of benzene vapors by dicyclohexane-18-crown-6 thin films

Portable Electronic Nose for Analyzing the Smell of Nasal Secretions in Calves: Toward Noninvasive Diagnosis of Infectious Bronchopneumonia

“…This means that signals of sensors with bromocresol blue (sensor 5) and methyl orange (sensor 3) are also significant for discriminating “healthy” and “sick” groups. In previous studies [ 52 , 53 , 54 , 55 ], we found that these coatings exhibit the most remarkable mass sensitivity to cyclic amines, aromatic amines, and carboxylic acids, respectively. Hence, when classifying samples into the “healthy” and “sick” groups, the appearance or change in the concentrations of ketones, alcohols, aldehydes, organic carboxylic acids, and amines, including cyclic amines or those with a branched hydrocarbon chain, in the gas phases over nasal swabs could be significant.…”

“…The loading plot ( Figure 8 ) shows that the initial signals made the most considerable contribution to the model of the sensors ΔF max,i , and the signals from the first set of sensors were more significant than from the second set. Therefore, taking into account the loadings for the seven principal components of the PCA–LDA model (shown in Table 6 , Figure 8 ), the most significant for classification were the signals of sensors with modifiers of carboxylated carbon nanotubes, zirconium nitrate, hydroxyapatite, methyl orange, bromocresol green, Triton X-100, and polyethylene glycol and its ethers, which are highly sensitive to vapors of nitrogen- and oxygen-containing compounds according to our previous investigation of sorption features of VOCs on these sorbents [ 37 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ].…”

“…These sorbents were chosen among 50 phases due to them having hypersensitivity to various classes of highly volatile organic compounds (alcohols, aldehydes, acids, ketones, amines, and arenes) [ 36 , 37 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ], including volatile biomarkers of respiratory pathologies.…”