Development of a Colorimetric Sensor for Autonomous, Networked, Real-Time Application

Johnson, Brandy J.; Malanoski, Anthony P.; Erickson, Jeffrey S.

doi:10.3390/s20205857

Cited by 9 publications

(5 citation statements)

References 89 publications

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“…3,8,[22][23][24][25] Kolorimetrijski detektori pomalo su izašli iz uporabe početkom 1990-ih kad ih zamjenjuju moderniji automatski kemijski detektori, no zbog odlične selektivnosti i niske cijene danas se ponovno upotrebljavaju u velikoj mjeri te se razvijaju novi kromogeni reagensi i uvodi automatizacija procesa analize. 22,[24][25][26][27][28][29] Kolorimetrijsko određivanje fozgena i difozgena u zraku najčešće se temelji se na reakciji fozgena s tzv. Harrisonovim reagensom, p-dimetilaminobenzaldehidom i N,N-dimetilanilinom (slika 3).…”

Section: Kolorimetrijaunclassified

Tehnologije koje se primjenjuju za terensku detekciju bojnih otrova: I. dio – Kolorimetrija i spektrometrija ionske pokretljivosti

Cetina¹,

Tušek²,

Ključarić³

2022

Kemija U Industriji

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Detection of chemical warfare agents and toxic industrial chemicals is very important for security forces. For a long time it has been based on colorimetric chemistry, and only the development of electronics has made the automation and miniaturisation of chemical detection possible. At the end of the 20 th century, automatic chemical detectors, mostly based on ion mobility spectrometry technology (IMS), began to appear on the market. Nowadays, colorimetric detectors are increasingly being used again due to their excellent selectivity and low cost, and new chromogenic reagents are being developed. On the other hand, the development of IMS detectors is focused on the use of an asymmetric field since it allows smaller dimensions and greater sensitivity of the detector. In this paper, besides commercially available chemical detectors based on colorimetry and ion mobility spectroscopy techniques, an overview of scientific research focused on further development of these technologies with the goal of increasing selectivity and sensitivity is given.

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Section: Kolorimetrijaunclassified

Tehnologije koje se primjenjuju za terensku detekciju bojnih otrova: I. dio – Kolorimetrija i spektrometrija ionske pokretljivosti

Cetina¹,

Tušek²,

Ključarić³

2022

Kemija U Industriji

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“…The colorimetric sensor array (CSA) has attracted increasing attention as a method for the classification and adulteration detection in chemically diverse analytes [ 12 , 13 , 14 , 15 , 16 , 17 ]. The CSA simulates the human olfactory system, presenting different combined responses to different compounds based on cross-reactive sensing receptors [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Detection of the Inoculated Fermentation Process of Apo Pickle Based on a Colorimetric Sensor Array Method

Wang

Liu

Huang

et al. 2022

Foods

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Apo pickle is a traditional Chinese fermented vegetable. However, the traditional fermentation process of Apo pickle is slow, easy to ruin, and cannot be judged with regard to time. To improve fermentation, LP-165 (L. Plantarum), which has a high salt tolerance, acidification, and growth capacity, was chosen as the starter culture. Meanwhile, a colorimetric sensor array (CSA) sensitive to pickle volatile compounds was developed to differentiate Apo pickles at varying degrees of fermentation. The color components were extracted from each dye in the color change profiles and were analyzed using principal component analysis (PCA) and linear discriminant analysis (LDA). The fermentation process of the Apo pickle was classified into four phases by LDA. The accuracy of backward substitution verification was 99% and the accuracy of cross validation was 92.7%. Furthermore, the partial least squares regression (PLSR) showed that data from the CSA were correlated with pH total acid, lactic acid, and volatile acids of the Apo pickle. These results illustrate that the CSA reacts quickly to inoculated Apo pickle and could be used to detect fermentation.

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“…Among a series of electronic, , colorimetric, and optical sensors , that can detect physical and chemical stimuli, whispering-gallery mode (WGM) optical microresonators have attracted great interest owing to their remote sensing capability and excellent sensitivity. − A WGM resonator entraps light via total internal reflection at its outermost surface. In a simple approximation, the wavelength of the WGM resonance peak is proportional to the optical path length and refractive index of the matrix .…”

Section: Introductionmentioning

confidence: 99%

“…5,6 These VOCs are known to cause headaches, nausea, and even more severe diseases like cancers. 7−9 Among a series of electronic, 10,11 colorimetric, 12 and optical sensors 13,14 that can detect physical and chemical stimuli, whispering-gallery mode (WGM) optical microresonators have attracted great interest owing to their remote sensing capability and excellent sensitivity. 15−17 A WGM resonator entraps light via total internal reflection at its outermost surface.…”

Section: ■ Introductionmentioning

confidence: 99%

Polymer Optical Microcavity Sensor for Volatile Organic Compounds with Distinct Selectivity toward Aromatic Hydrocarbons

et al. 2021

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A whispering-gallery mode (WGM) optical resonance sensor for volatile organic compounds (VOCs) is developed from polystyrene (PS) microspheres doped with fluorescent βcyano-appended oligo(p-phenylenevinylene) (β-COPV). The β-COPV-doped PS microspheres (MS COPV ) are formed by the miniemulsion method in a binary solvent. MS COPV expand upon permeation of VOCs into the PS matrix and exhibit a spectral shift of the WGM resonance peak. The permeation efficiency is highly dependent on the chemical affinity between the analyte and the polymer matrix, with exceptionally high selectivity toward aromatic hydrocarbons such as benzene, toluene, and xylenes (BTXs). The high selectivity and sensitivity of MS COPV are in clear contrast to those of conventional WGM sensors that just detect VOCs nonpreferentially through adsorption onto the surface.

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Development of a Colorimetric Sensor for Autonomous, Networked, Real-Time Application

Cited by 9 publications

References 89 publications

Tehnologije koje se primjenjuju za terensku detekciju bojnih otrova: I. dio – Kolorimetrija i spektrometrija ionske pokretljivosti

Tehnologije koje se primjenjuju za terensku detekciju bojnih otrova: I. dio – Kolorimetrija i spektrometrija ionske pokretljivosti

Detection of the Inoculated Fermentation Process of Apo Pickle Based on a Colorimetric Sensor Array Method

Polymer Optical Microcavity Sensor for Volatile Organic Compounds with Distinct Selectivity toward Aromatic Hydrocarbons

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