Surface enhanced infra-red spectroscopy with modified silver nanoparticles (AgNPs) for detection of quaternary ammonium cationic surfactants

2019 ◽  
Vol 43 (21) ◽  
pp. 8109-8121 ◽  
Author(s):  
Ramsingh Kurrey ◽  
Manas Kanti Deb ◽  
Kamlesh Shrivas
Keyword(s):  
Silver Nanoparticles ◽  
Water Samples ◽  
Quaternary Ammonium ◽  
Cationic Surfactants ◽  
Single Drop ◽  
Single Drop Microextraction ◽  
Surface Enhanced ◽  
Infra Red ◽  
Quaternary Ammonium Cationic Surfactants

A novel surface enhanced infra-red spectroscopy (SEIRS) method with silver nanoparticles (AgNPs) assisted by single drop microextraction (SDME) was developed for detection of total mixed quaternary ammonium cationic surfactants (QACS) in water samples.

scholarly journals Coupling Single-Drop Microextraction with SERS: A Demonstration Using p-MBA on Gold Nanohole Array Substrate

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4394 ◽  
Author(s):  
Elias B. Santos ◽  
Chiara Valsecchi ◽  
Jaderson L. S. Gonçalves ◽  
Luis F. Ávila ◽  
Jacson W. Menezes
Keyword(s):  
Interference Lithography ◽  
Sers Substrate ◽  
Single Drop ◽  
Nanohole Array ◽  
Low Concentrations ◽  
Sample Extraction ◽  
Single Drop Microextraction ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Single-drop microextraction (SDME) was coupled with surface-enhanced Raman scattering (SERS) to provide sample extraction and pre-concentration for detection of analyte at low concentrations. A gold nanohole array substrate (AuNHAS), fabricated by interference lithography, was used as SERS substrate and para-mercaptobenzoic acid (p-MBA) was tested as a probe molecule, in the concentration range 10−8–10−4 mol L−1. With this approach, a limit of 10−7 mol L−1 was clearly detected. To improve the detection to lower p-MBA concentration, as 10−8 mol L−1, the SDME technique was applied. The p-MBA Raman signature was detected in two performed extractions and its new concentration was determined to be ~4.6 × 10−5 mol L−1. This work showed that coupling SDME with SERS allowed a rapid (5 min) and efficient pre-concentration (from 10−8 mol L−1 to 10−5 mol L−1), detection, and quantification of the analyte of interest, proving to be an interesting analytical tool for SERS applications.

An ionic liquid as a solvent for headspace single drop microextraction of chlorobenzenes from water samples

2007 ◽  
Vol 584 (1) ◽  
pp. 189-195 ◽  
Author(s):  
Lorena Vidal ◽  
Elefteria Psillakis ◽  
Claudia E. Domini ◽  
Nuria Grané ◽  
Frank Marken ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Water Samples ◽  
Single Drop ◽  
Single Drop Microextraction
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