Forensic scientists often use gas chromatography to determine the presence of illegal substances in subjects, analyze emerging designer drugs, test blood or fibers from a crime scene, and detect possible residues left by explosives or accelerants.
Known advantages of VUV Spectroscopy
- Provides unambiguous identification of isomers, which are difficult to characterize by mass spectrometry (MS)
- Non-destructive detection that complements MS
- Orthogonal technique for confirming compound identity
- Peer reviewed drug of abuse data shows quantitative results in the low nanogram range
- Provides compound class information for closely related unknown compounds
- Software deconvolution of analyte co-elution allows short GC chromatographic compression
- Easy to understand analysis by Beer-Lambert Law (same principle used in UV-Vis spectroscopy)
See the latest on the GC-VUV solution for the rapid identification and quantitation of drugs of abuse, as well as a new method for fire debris analysis
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Solving Analytical Challenges in Forensics
Key Features of VUV Spectroscopy
- High degree of data analysis automation reduces human error
- Intuitive spectral fingerprint compound identification and Beer’s Law quantitation eliminates guesswork
- Software deconvolution of co-eluting analytes allows chromatography runtimes to be deliberately compressed
- Proprietary algorithms automate compound class characterization
Shining a new light in gas chromatography and streaming gas applications.
Everything absorbs strongly in the VUV spectrum. Compounds can be unambiguously identified and quantitated in a variety of applications including oil & gas, forensics, fragrances & flavors, petrochemical, environmental, and life science. VUV detectors provide unmatched selectivity of isomers and co-eluting analytes without the need for chromatographic baseline resolution. Unlike legacy detection methods, VUV spectroscopy allows for more automated analysis with lower risk of errors, shorter chromatography run times, and higher analytical throughput.
- Universal, yet selective detector with very sensitive spectral response
- Easy deconvolution and quantitation of co‑eluting analytes
- Robust technology with no reliance on vacuum pumps
- No calibration required – 1st principle detection technique provides a predictable linear response
- Complements mass spectrometry by fully characterizing isomers and compounds with low mass quant ions
Approaching the Opioid Epidemic: One Analysis at a Time — Fentanyl Isomer Analysis by GC-VUVLindsey Shear-Laude, VUV Analytics
Lindsey Shear-Laude, VUV Analytics
Lindsey describes how VUV spectra enable the clear differentiation of fentanyl isomers. GC-VUV offers a new tool for seized drug analysis where structural isomers are encountered. Fentanyl analysis is simplified by fully characterizing compounds with low mass quant ions that are problematic with GC-MS.
VUV en Vogue – The Analytical ScientistThe Analytical Scientist
An Interview with Dr. Nicholas Snow About Gas Chromatography and VUV SpectroscopyPaul Johnson, VUV Analytics
Paul Johnson, VUV Analytics
VUV Analytics recently announced Dr. Nicholas Snow as the recipient of their summer 2016 academic grant, which provides Dr. Snow’s laboratory with the use of the VGA-100 Vacuum Ultraviolet (VUV) detector to do novel research on gas chromatography.
Ira Lurie describes chromatographic approaches to seized drug analysis and how GC-VUV is a useful tool for characterizing the positional isomer analogues. He hints to the analytical capabilities of GC–VUV combined with ultra high-pressure liquid supercritical fluid chromatography (UHPSFC) and MS/MS or QTOF detection.
“The VUV detector has proven itself with the ability to distinguish olefins and aromatics from aliphatics – that’s a killer application given the complexity and time involved using any other technique. The VUV detector’s ability to perform a more accurate and much more robust PIONA analysis is an important milestone in its ongoing success.”
Bill Winniford, Fellow
Bill Winniford, Fellow, The Dow Chemical Company, Houston, Texas, USA
“VUV spectroscopy adds a dimension that is complementary to mass spectrometry, offering selectivity that is difficult to otherwise obtain.”
Hans-Gerd Janssen, Professor and Science Leader
Hans-Gerd Janssen, Professor, University of Amsterdam, and Science leader, Unilever Research Vlaardingen, the Netherlands
“One of the main advantages of VUV detection for us appeared to be the ability to gain more specific molecular information…co-elutions that we know exist but cannot be identified with FID can be unraveled.”
Pierre Giusti, Molecular Separation & Identification Service Manager, and Gaelle Jousset, Gas Chromatography Laboratory Manager
Pierre Giusti, Molecular Separation & Identification Service Manager, and Gaelle Jousset, Gas Chromatography Laboratory Manager, Research & Development, TOTAL Refining & Chemicals, Normandy, France
“The VUV detector will be used as a universal, calibration-free tool that provides the relative quantitative values of distinct molecules in mixtures in a rapid manner.”
Luigi Mondello, Chair of ISCC and GCxGC Conference in Riva del Garda, and Professor
Luigi Mondello, Chair of ISCC and GCxGC Conference in Riva del Garda, and Professor, University of Messina, Italy
“One thing that I really like about VUV is that it can be considered a universal detector but with the advantage of being familiar to us. We all used UV spectrometers in school.”
Nicholas Snow, Professor
Nicholas Snow, Professor, Seton Hall University, New Jersey, USA
“Eliminates ionization inefficiencies that are encountered in mass spectrometry analysis."
Mark R. Emmett, Ph.D.
Mark R. Emmett, Ph.D. Professor, The University of Texas Medical Branch Galveston, UTMB Cancer Research Center
“An amazingly simple concept extended into a powerful spectral region."
Tim Hossain, Ph.D.
Tim Hossain, Ph.D. Chief Scientist, Cerium Laboratories
“The VUV detector is a powerful new tool in the GC toolbox."
Kevin A. Schug, Ph.D.
Kevin A. Schug, Ph.D. Professor & Shimadzu Distinguished Professor of Analytical Chemistry, The University of Texas at Arlington