Amine compounds are considered highly important in environmental pollution, industrial, and medicinal fields. The objective of this work was to develop a disposable, highly accurate, highly selective, and low-cost paper-based probe through the combination of color change of seven pH indicators for the detection of amine compounds in the gaseous state. The probe was designed with seven rings which were printed using the wax-printing technique and colored with different pH indicators. The colors of the probe were analyzed using red, green, and blue () values extracted from the images obtained with a homemade smartphone application. The chemometric tools, principal component analysis, and hierarchical cluster analysis methods were adapted to further classify amine gases. The colorimetric probe showed an excellent capability for detecting the amines with high accuracy, prompt response, and high selectivity. These dye arrays have been proven to detect ethanolamine (NHCHCHOH), dimethylamine ((CH)NH), and trimethylamine ((CH)N) gases at parts per million scale.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6682055 | PMC |
| http://dx.doi.org/10.1021/acsomega.9b01388 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A rhodamine-conjugated fluorescent and colorimetric receptor for the detection of Cu ions: environmental utility and smartphone integration.
Anal Methods
January 2025
Department of Chemistry, Karpagam Academy of Higher Education, Coimbatore, Tamil Nadu, India.
A new rhodamine based turn on florescent probe ()-3',6'-bis(ethylamino)-2-(((6-methoxy-2-oxo-1,2-dihydroquinolin-3-yl)methylene)amino)-2',7'-dimethylspiro[isoindoline-1,9'-xanthen]-3-one (RME) was efficiently synthesized through a simple condensation reaction of 2-amino-3',6'-bis(ethylamino)-2',7'-dimethylspiro[isoindoline-1,9'-xanthen]-3-one and 6-methoxy-2-oxo-1,2-dihydroquinoline-3-carbaldehyde. The receptor RME is highly non-fluorescent and when copper ions (Cu ions) are added in DMF/water (1 : 2, v/v) medium, the receptor RME exhibits a specific "turn-on" colorimetric and fluorometric response. Moreover, RME binding with Cu ions produced a remarkable color variation that was perceptible to the human eye, changing from colorless to pink.
View Article and Find Full Text PDFPeptide nucleic acid-immobilised paper combined with multiplex recombinase polymerase amplification for the ultrasensitive and rapid detection of rifampicin-resistant tuberculosis.
Sci Rep
January 2025
Faculty of Allied Health Sciences, Center of Excellence for Innovative Diagnosis of Antimicrobial Resistance, Chulalongkorn University, Bangkok, 10330, Thailand.
Rifampicin-resistant tuberculosis (RR-TB) is a critical issue with significant implications for patient care, public health, and TB control efforts that necessitate comprehensive strategies for detection. This study presents a novel point-of-care diagnostic tool for RR-TB detection employing a peptide nucleic acid (PNA)-paper-based sensor combined with isothermal recombinase polymerase amplification (RPA). The sensor targets mutations in codons 516, 526, and 531 of the rpoB gene, the top three common mutations associated with rifampicin-resistant strains.
View Article and Find Full Text PDFA signal amplifying MOF-based probe:on-site and ultrasensitive dual-channel portable detection of Hg in groundwater through a fluorimetrically and RGB-based sensing assay.
Talanta
January 2025
State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou, Gansu, 730000, People's Republic of China. Electronic address:
Mercury (II) ions (Hg) are a significant source of heavy metal contamination in groundwater, posing a serious threat to human health and the environment. Therefore, there is an urgent need for the development of a new detection technique with high sensitivity for monitoring Hg in contaminated groundwater. Here, we developed a signal amplifying MOF-based probe (NXS@ZIF-8) for on-site and ultrasensitive dual-channel portable detection of Hg in groundwater.
View Article and Find Full Text PDFPortable paper-based microfluidic devices with CuAgS NPs modification for multiplex intelligent visualized detection of adrenaline and glucose simultaneously.
Anal Chim Acta
January 2025
Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun, 130117, China.
Background: Adrenaline and glucose are essential biomarkers in human body for maintaining metabolic balance. Abnormal levels of adrenaline and glucose are associated with various diseases. Therefore, it is important to design portable, on-site devices for rapid adrenaline and glucose analysis to safeguard health.
View Article and Find Full Text PDFDevelopment of a Coumarin-Based Schiff Base Fluorescent Probe and its Application in Detection of Cu²⁺.
J Fluoresc
January 2025
College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, 450001, China.
A highly practical Schiff base fluorescent probe, (E)-3-amino-N'-((7-(diethylamino)-2-oxo-2 H-chromen-3-yl)methylene)thiophene-2-carbohydrazide (M), with a facile synthetic route has been successfully developed. M has been utilized for the specific detection of Cu in THF/HO Tris buffer solution (v/v = 9:1, 0.01 M, pH = 7.
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!