Colorimetric gas sensors show promise as selective detectors for gas chromatography (GC), but their application has been limited by the irreversibility of their responses. This study presents the successful hyphenation of colorimetric gas sensors with GC, overcoming this limitation through a novel approach that refreshes the sensor's reaction area with controlled movement, enabling the generation of reversible GC peaks. The sensors, based on acid-base indicators, such as chlorophenol red and bromocresol green, were integrated with a capillary GC column and evaluated for amine detection. Performance testing revealed satisfactory sensitivity, linearity, and reproducibility, with the colorimetric sensors demonstrating superior selectivity for amines compared to flame ionization detectors (FID). Moreover, a dual-sensor array, combined with a pattern recognition algorithm, enabled effective discrimination between various amine compounds. This work establishes a promising, cost-effective alternative for portable GC systems, enhancing selectivity and improving the capability of field vapor analysis.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.analchem.4c06940 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Engineering Perovskite Hydroxide as a Cold-Adapted Oxidase Mimic for Construction of the Robust Low-Temperature Adaptive Biosensors.
ACS Sens
March 2025
Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221002, Jiangsu, China.
Traditional biological detection methods rely on signal amplification strategies such as enzymatic catalysis or nucleic acid amplification. However, their efficiency decreases in low-temperature environments, compromising their detection sensitivity. To break the loss of enzyme catalytic activity at low temperatures, research on cold-adaptive nanozymes has attracted much attention.
View Article and Find Full Text PDFA tandem conversion process for the synthesis of polyitaconic acid from glucose in the Aspergillus terreus culture.
Bioprocess Biosyst Eng
March 2025
Department of Biobased Materials Science, Kyoto Institute of Technology, 1 Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan.
In this study, a bio-based vinylidene monomer, itaconic acid (IA), produced by a fungus Aspergillus terreus NBRC 6123 was polymerized in the culture. The inhibition of IA polymerization by the culture components was eased by extraction with 4-methyltetrahydropyran (4mTHP). The extraction with 4mTHP for 4 days under aerobic condition resulted in IA production at 67.
View Article and Find Full Text PDFA dual-functional needle-based VOC sensing platform for rapid vegetable phenotypic classification.
Biosens Bioelectron
March 2025
Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA; Emerging Plant Disease and Global Food Security Cluster, North Carolina State University, Raleigh, NC, 27695, USA. Electronic address:
Volatile organic compounds (VOCs) are common constituents of fruits, vegetables, and crops, and are closely associated with their quality attributes, such as firmness, sugar level, ripeness, translucency, and pungency levels. While VOCs are vital for assessing vegetable quality and phenotypic classification, traditional detection methods, such as Gas Chromatography-Mass Spectrometry (GC-MS) and Proton Transfer Reaction Mass Spectrometry (PTR-MS) are limited by expensive equipment, complex sample preparation, and slow turnaround time. Additionally, the transient nature of VOCs complicates their detection using these methods.
View Article and Find Full Text PDFPotential activity of essential oil for treating infection through modulating electrolytes and suppressing NF-κB p65 pathway.
Front Pharmacol
February 2025
Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran.
Background: The pharmacological treatment of infection involves the use of chemical agents, such as metronidazole (MNZ). However, these medications are associated with a range of adverse effects, and their effectiveness is not definitively established. In light of the previously discussed information and the recognized antimicrobial properties of , this study aims to investigate both the and anti-giardial effects of essential oil (FME) on infection.
View Article and Find Full Text PDFDevelopment of multifunctional starch/pectin composite film engineered with ZIF-67-loaded microcrystalline cellulose for real-time monitoring and preserving of pork freshness.
Carbohydr Polym
May 2025
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China. Electronic address:
The escalating environmental concerns associated with plastic waste have driven the need for sustainable food packaging solutions. In this study, a multifunctional composite film was developed to simultaneously monitor and preserve pork freshness. The film was based on loquat seed starch (LSS) as the matrix, pectin (P) and cobalt-based metal-organic framework (ZIF-67)-loaded microcrystalline cellulose (ZIF-67@MCC) as strengthening and colorimetric fillers.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!