Nanowell-enhanced Raman spectroscopy enables the visualization and quantification of nanoplastics in the environment

2022 ◽  
Author(s):  
Wei Zhang ◽  
Lin Chang ◽  
Shan Jiang ◽  
Jie Luo ◽  
Jianfa Zhang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Quantitative Detection ◽  
Severe Toxicity ◽  
Surface Enhanced ◽  
Persistent Pollutants ◽  
Surface Enhanced Raman

Nanoplastics are persistent pollutants that can cause severe toxicity to mammals. To date, no technology could simultaneously capture nanoplastic chemical and morphological information while conducting quantitative detection. Surface-enhanced Raman spectroscopy...

Multivariate Analysis Aided Surface-Enhanced Raman Spectroscopy (MVA-SERS) Multiplex Quantitative Detection of Trace Fentanyl in Illicit Drug Mixtures Using a Handheld Raman Spectrometer

2021 ◽  
pp. 000370282110329
Author(s):  
Ling Wang ◽  
Mario O. Vendrell-Dones ◽  
Chiara Deriu ◽  
Sevde Doğruer ◽  
Peter de B. Harrington ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Principal Component ◽  
Surface Enhanced Raman Spectroscopy ◽  
Quantitative Detection ◽  
Least Squares Regression ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Current Screening

Recently there has been upsurge in reports that illicit seizures of cocaine and heroin have been adulterated with fentanyl. Surface-enhanced Raman spectroscopy (SERS) provides a useful alternative to current screening procedures that permits detection of trace levels of fentanyl in mixtures. Samples are solubilized and allowed to interact with aggregated colloidal nanostars to produce a rapid and sensitive assay. In this study, we present the quantitative determination of fentanyl in heroin and cocaine using SERS, using a point-and-shoot handheld Raman system. Our protocol is optimized to detect pure fentanyl down to 0.20 ± 0.06 ng/mL and can also distinguish pure cocaine and heroin at ng/mL levels. Multiplex analysis of mixtures is enabled by combining SERS detection with principal component analysis and super partial least squares regression discriminate analysis (SPLS-DA), which allow for the determination of fentanyl as low as 0.05% in simulated seized heroin and 0.10% in simulated seized cocaine samples.

scholarly journals Dual-triggered nanoaggregates of cucurbit[7]uril and gold nanoparticles for multi-spectroscopic quantification of creatinine in urinalysis

2020 ◽  
Vol 8 (21) ◽  
pp. 7051-7058
Author(s):  
Weng-I Katherine Chio ◽  
Suresh Moorthy ◽  
Jayakumar Perumal ◽  
Dinish U. S. ◽  
Ivan P. Parkin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Quantitative Detection ◽  
Vis Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

A novel nanosensing platform was developed for the quantitative detection of creatinine of clinically relevant concentrations via UV-Vis spectroscopy and surface-enhanced Raman spectroscopy.

Fabrication of sensitive silver-decorated cotton swabs for SERS quantitative detection of mixed pesticide residues in bitter gourds

2020 ◽  
Vol 44 (29) ◽  
pp. 12779-12784
Author(s):  
Lili Kong ◽  
Meizhen Huang ◽  
Jie Chen ◽  
Mengshi Lin
Keyword(s):  
Raman Spectroscopy ◽  
Pesticide Residues ◽  
Rapid Detection ◽  
Environmentally Friendly ◽  
Surface Enhanced Raman Spectroscopy ◽  
Quantitative Detection ◽  
Fabrication Method ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

This study developed a simple, efficient and environmentally friendly fabrication method for surface-enhanced Raman spectroscopy (SERS) wipers for the rapid detection of individual and mixed pesticide residues in actual samples.

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