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Classification of narcotics in solid mixtures using principal component analysis and Raman spectroscopy
(ASTM International, 2002-03-01)
Eighty-five solid samples consisting of illegal narcotics diluted with several different materials were analyzed by near-infrared (785 nm excitation) Raman spectroscopy. Principal Component Analysis (PCA) was employed to ...
Surface enhanced Raman scattering for narcotic detection and applications to chemical biology
(Elsevier, 2005)
Raman spectroscopy is rapidly finding favour for applications in the life science because of the ease with which it can be used to extract significant data from tissue and cells. However, the Raman effect is an inherently ...
Time-domain measurement of fluorescence lifetime variation with pH
(Society of Photo-optical Instrumentation Engineers, 2001)
Advances in the design and miniaturization of the lasers and electronics required for Time Correlated Single Photon Counting (TCSPC) measurement of fluorescence lifetime have simplified the use of the time domain method. ...
Fluorescence emission from petroleum; a valuable information source for petroleum analysis.
(EniTecnologie, 2004)
Despite the fact that most crude oils are dark coloured liquids, many are observed to be strongly fluorescent when illuminated with UV light. This fluorescence, which originates from the presence of aromatic compounds, is ...
Analysis of hydrocarbon bearing fluid inclusions HCFI) using time-resolved fluorescence spectroscopy
(Society of Photo-optical Instrumentation Engineers, 2005)
Hydrocarbon-bearing fluid inclusions (HCFI) are microscopic cavities within rocks that are filled with petroleum oil, the
composition of which may not have changed since the trapping event. Thus, the composition of that ...
Influence of chemical composition on the fluorescence lifetimes of crude petroleum oils
(Society of Photo-optical Instrumentation Engineers, 2003)
Fluorescence based methods are increasingly being used for the analysis of crude oils because they offer high speed, low
cost, non-contact, and non-destructive testing options. The fluorescence of crude oils is due to the ...
Measuring the micro-polarity and hydrogen-bond donor/acceptor ability of thermoresponsive N-isopropylacrylamide/N-tert-butylacrylamide copolymer films using solvatochromic indicators
(application/pdf, 2009)
Thin polymer films are important in many areas of biomaterials research, biomedical devices, and biological sensors. The accurate in situ measurement of multiple physicochemical properties of thin polymer films is critical ...
Quantitative analysis of cocaine in solid mixtures using Raman spectroscopy and chemometric methods
(Wiley, 2000)
Near-infrared (785 mn) excitation was used to obtain Raman spectra from a series of 33 solid mixtures containing cocaine, caffeine and glucose (9.8-80.6% by weight cocaine), which were then analysed using chemometric ...
Evaluation of acridine in Nafion as a fluorescence-lifetime-based pH sensor
(2003)
We report a novel fluorescence-lifetime-based pH sensing method that utilizes acridine incorporated into Nation (AcNaf) as the fluorescent indicator. The AcNaf sensor is excited using a 380 nm light emitting diode (LED) ...
Measuring the Micro-Polarity and Hydrogen-Bond Donor/Acceptor Ability of Thermoresponsive N-Isopropylacrylamide/N-tert-Butylacrylamide Copolymer Films Using Solvatochromic Indicators
(2009)
Thin polymer films are important in many areas of biomaterials research, biomedical devices, and biological sensors. The accurate in situ measurement of multiple physicochemical properties of thin polymer films is critical ...