Measurement of Methanol Proportion in Methanol-Gasoline Mixtures - An Application of Fiber Optic Raman Spectroscopy

2000 ◽  
Author(s):  
Anand K. Asundi ◽  
Vasudeva V. Rao
Keyword(s):  
Raman Spectroscopy ◽  
Fiber Optic

scholarly journals Real-time In vivo Diagnosis of Nasopharyngeal Carcinoma Using Rapid Fiber-Optic Raman Spectroscopy

Theranostics ◽  
2017 ◽  
Vol 7 (14) ◽  
pp. 3517-3526 ◽  
Author(s):  
Kan Lin ◽  
Wei Zheng ◽  
Chwee Ming Lim ◽  
Zhiwei Huang
Keyword(s):  
Raman Spectroscopy ◽  
Nasopharyngeal Carcinoma ◽  
Real Time ◽  
Fiber Optic ◽  
In Vivo Diagnosis

scholarly journals Fiber Optic Coupled Raman Based Detection of Hazardous Liquids Concealed in Commercial Products

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Michael L. Ramírez-Cedeño ◽  
Natalie Gaensbauer ◽  
Hilsamar Félix-Rivera ◽  
William Ortiz-Rivera ◽  
Leonardo Pacheco-Londoño ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Raman Spectroscopy ◽  
Fiber Optic ◽  
Hazardous Materials ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Consumer Products ◽  
Algorithm Analysis ◽  
Triethyl Phosphate ◽  
Industrial Compounds

Raman spectroscopy has been widely proposed as a technique to nondestructively and noninvasively interrogate the contents of glass and plastic bottles. In this work, Raman spectroscopy is used in a concealed threat scenario where hazardous liquids have been intentionally mixed with common consumer products to mask its appearance or spectra. The hazardous liquids under consideration included the chemical warfare agent (CWA) simulant triethyl phosphate (TEP), hydrogen peroxide, and acetone as representative of toxic industrial compounds (TICs). Fiber optic coupled Raman spectroscopy (FOCRS) and partial least squares (PLS) algorithm analysis were used to quantify hydrogen peroxide in whiskey, acetone in perfume, and TEP in colored beverages. Spectral data was used to evaluate if the hazardous liquids can be successfully concealed in consumer products. Results demonstrated that FOC-RS systems were able to discriminate between nonhazardous consumer products and mixtures with hazardous materials at concentrations lower than 5%.

Rapid diagnostics of liver steatosis by Raman spectroscopyviafiber optic probe: a pilot study

The Analyst ◽  
2018 ◽  
Vol 143 (19) ◽  
pp. 4723-4731 ◽  
Author(s):  
Marta Z. Pacia ◽  
Krzysztof Czamara ◽  
Magdalena Zebala ◽  
Edyta Kus ◽  
Stefan Chlopicki ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Pilot Study ◽  
Diagnostic Tool ◽  
Fiber Optic ◽  
Liver Steatosis ◽  
Rapid Diagnostics ◽  
Fiber Optic Probes ◽  
Optic Probe ◽  
Rapid Quantification

Raman spectroscopyviafiber optic probes enables assessment of the liver condition and rapid quantification of liver steatosis, thus, this technique has the potential as a diagnostic tool.

Precise Determination of Percent Cure of Epoxide Polymers and Composites via Fiber-Optic Raman Spectroscopy and Multivariate Analysis

1997 ◽  
Vol 51 (2) ◽  
pp. 247-252 ◽  
Author(s):  
Jeffrey F. Aust ◽  
Karl S. Booksh ◽  
Christopher M. Stellman ◽  
Richard S. Parnas ◽  
Michael L. Myrick
Keyword(s):  
Raman Spectroscopy ◽  
Multivariate Analysis ◽  
Real Time ◽  
Fiber Optic ◽  
Precise Determination ◽  
Probe Design ◽  
Epoxide Polymers ◽  
Time Determination

A method for real-time determination of the percent cure of epoxies via in situ fiber-optic Raman spectroscopy has been developed. This method utilizes a probe design developed for real-time monitoring of polymer curing and multivariate analysis to interpret the data and determine percent cure. This method was demonstrated to be reliable to ±0.54% of cure in laboratory samples over a 50–99% cure range. A preliminary study measuring cure percentage in an industrial, glass-reinforced composite has been shown to be reliable to ±0.82% in the 40–90% cure range.

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