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Latest:
Avoiding Misunderstanding Self-Absorption in Laser-Induced Breakdown Spectroscopy (LIBS) AnalysisThe physics and chemistry of the phenomenon have been well known for many years, and this knowledge can tell us how self-absorption can be not only “corrected,” but also tuned to our advantage in analytical applications of LIBS.
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Applying LIBS to Metals ProcessingThe monitoring of the processes in steel and metal industry calls for techniques that are capable of measuring the composition of metallic alloys at a distance and on moving conveyor belts. In many cases, such as in the recycling of automotive scrap, the geometry of the objects to be analyzed can vary, and surface coatings can be present. In this paper, we discuss the application of LIBS to two industrial projects to illustrate how the above-mentioned problems can be faced and successfully resolved.
Latest:
Applying LIBS to Metals ProcessingThe monitoring of the processes in steel and metal industry calls for techniques that are capable of measuring the composition of metallic alloys at a distance and on moving conveyor belts. In many cases, such as in the recycling of automotive scrap, the geometry of the objects to be analyzed can vary, and surface coatings can be present. In this paper, we discuss the application of LIBS to two industrial projects to illustrate how the above-mentioned problems can be faced and successfully resolved.
Latest:
Applying LIBS to Metals ProcessingThe monitoring of the processes in steel and metal industry calls for techniques that are capable of measuring the composition of metallic alloys at a distance and on moving conveyor belts. In many cases, such as in the recycling of automotive scrap, the geometry of the objects to be analyzed can vary, and surface coatings can be present. In this paper, we discuss the application of LIBS to two industrial projects to illustrate how the above-mentioned problems can be faced and successfully resolved.
Latest:
Applying LIBS to Metals ProcessingThe monitoring of the processes in steel and metal industry calls for techniques that are capable of measuring the composition of metallic alloys at a distance and on moving conveyor belts. In many cases, such as in the recycling of automotive scrap, the geometry of the objects to be analyzed can vary, and surface coatings can be present. In this paper, we discuss the application of LIBS to two industrial projects to illustrate how the above-mentioned problems can be faced and successfully resolved.
Latest:
VT-DRIFTS Investigations of Interactions Between Benzoic Acid and Montmorillonite ClayHigh stability Fourier transform-infrared (FT-IR) interferometers make it possible to conduct experiments designed to identify subtle sample structure changes resulting from external perturbations. In particular, IR spectrum measurements obtained while heating samples can be used to associate specific structure changes with incremental additions of thermal energy. This paper describes the application of variable temperature diffuse reflection infrared Fourier transform spectroscopy (VT-DRIFTS) for analysis of benzoic acid adsorbed on montmorillonite clay. The technique described here is generally applicable for soil adsorbate characterization studies, and therefore should be useful for elucidating soil transport mechanisms for selected contaminants.
Latest:
VT-DRIFTS Investigations of Interactions Between Benzoic Acid and Montmorillonite ClayHigh stability Fourier transform-infrared (FT-IR) interferometers make it possible to conduct experiments designed to identify subtle sample structure changes resulting from external perturbations. In particular, IR spectrum measurements obtained while heating samples can be used to associate specific structure changes with incremental additions of thermal energy. This paper describes the application of variable temperature diffuse reflection infrared Fourier transform spectroscopy (VT-DRIFTS) for analysis of benzoic acid adsorbed on montmorillonite clay. The technique described here is generally applicable for soil adsorbate characterization studies, and therefore should be useful for elucidating soil transport mechanisms for selected contaminants.
Latest:
VT-DRIFTS Investigations of Interactions Between Benzoic Acid and Montmorillonite ClayHigh stability Fourier transform-infrared (FT-IR) interferometers make it possible to conduct experiments designed to identify subtle sample structure changes resulting from external perturbations. In particular, IR spectrum measurements obtained while heating samples can be used to associate specific structure changes with incremental additions of thermal energy. This paper describes the application of variable temperature diffuse reflection infrared Fourier transform spectroscopy (VT-DRIFTS) for analysis of benzoic acid adsorbed on montmorillonite clay. The technique described here is generally applicable for soil adsorbate characterization studies, and therefore should be useful for elucidating soil transport mechanisms for selected contaminants.
Latest:
VT-DRIFTS Investigations of Interactions Between Benzoic Acid and Montmorillonite ClayHigh stability Fourier transform-infrared (FT-IR) interferometers make it possible to conduct experiments designed to identify subtle sample structure changes resulting from external perturbations. In particular, IR spectrum measurements obtained while heating samples can be used to associate specific structure changes with incremental additions of thermal energy. This paper describes the application of variable temperature diffuse reflection infrared Fourier transform spectroscopy (VT-DRIFTS) for analysis of benzoic acid adsorbed on montmorillonite clay. The technique described here is generally applicable for soil adsorbate characterization studies, and therefore should be useful for elucidating soil transport mechanisms for selected contaminants.
Latest:
Analytical Efforts Toward Monitoring Groundwater in Regions of Unconventional Oil and Gas ExplorationA mix of analytical methods is required to understand the impact, if any, that UOG activity is having on groundwater.
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Fourier-Transform Molecular Rotational Resonance Spectroscopy: Bridging the Gap Between Spectroscopy and Chromatography for VOC AnalysisThis study demonstrates the strengths of FT-MMR for simple, direct analysis of VOCs and other toxic industrial chemicals.
Latest:
Fourier-Transform Molecular Rotational Resonance Spectroscopy: Bridging the Gap Between Spectroscopy and Chromatography for VOC AnalysisThis study demonstrates the strengths of FT-MMR for simple, direct analysis of VOCs and other toxic industrial chemicals.
Latest:
Fourier-Transform Molecular Rotational Resonance Spectroscopy: Bridging the Gap Between Spectroscopy and Chromatography for VOC AnalysisThis study demonstrates the strengths of FT-MMR for simple, direct analysis of VOCs and other toxic industrial chemicals.
Latest:
Fourier-Transform Molecular Rotational Resonance Spectroscopy: Bridging the Gap Between Spectroscopy and Chromatography for VOC AnalysisThis study demonstrates the strengths of FT-MMR for simple, direct analysis of VOCs and other toxic industrial chemicals.
Latest:
The State of the Art of Flow-Through Solid-Phase SpectrometryFlow-through SPS lowers reagent and sample consumption and decreases waste generation.
Latest:
The State of the Art of Flow-Through Solid-Phase SpectrometryFlow-through SPS lowers reagent and sample consumption and decreases waste generation.
Latest:
The State of the Art of Flow-Through Solid-Phase SpectrometryFlow-through SPS lowers reagent and sample consumption and decreases waste generation.
Latest:
Combining Thermal Desorption GC and TOF-MS for the Determination of Melon VOC ProfilesThe quality and safety of ready-to-eat packaged foods-such as salads-is very difficult for consumers and suppliers to judge, and improving this situation is the focus of a Europe-wide research project. Part of the project is devoted to the development of better methods to detect and analyze the volatile organic compounds released from relevant food types, in an effort to identify biomarkers for quality and microbial contamination. This article examines one important food (melon) and shows how a method based on thermal desorption (TD) with gas chromatography-time-of-flight-mass spectrometry (GC–TOF-MS) can elucidate how key volatiles vary with time of storage and with the size of the melon pieces. The article highlights how such analytical information will be of value in efforts to improve the quality and safety of ready-to-eat foods.
Latest:
Combining Thermal Desorption GC and TOF-MS for the Determination of Melon VOC ProfilesThe quality and safety of ready-to-eat packaged foods-such as salads-is very difficult for consumers and suppliers to judge, and improving this situation is the focus of a Europe-wide research project. Part of the project is devoted to the development of better methods to detect and analyze the volatile organic compounds released from relevant food types, in an effort to identify biomarkers for quality and microbial contamination. This article examines one important food (melon) and shows how a method based on thermal desorption (TD) with gas chromatography-time-of-flight-mass spectrometry (GC–TOF-MS) can elucidate how key volatiles vary with time of storage and with the size of the melon pieces. The article highlights how such analytical information will be of value in efforts to improve the quality and safety of ready-to-eat foods.
Latest:
Combining Thermal Desorption GC and TOF-MS for the Determination of Melon VOC ProfilesThe quality and safety of ready-to-eat packaged foods-such as salads-is very difficult for consumers and suppliers to judge, and improving this situation is the focus of a Europe-wide research project. Part of the project is devoted to the development of better methods to detect and analyze the volatile organic compounds released from relevant food types, in an effort to identify biomarkers for quality and microbial contamination. This article examines one important food (melon) and shows how a method based on thermal desorption (TD) with gas chromatography-time-of-flight-mass spectrometry (GC–TOF-MS) can elucidate how key volatiles vary with time of storage and with the size of the melon pieces. The article highlights how such analytical information will be of value in efforts to improve the quality and safety of ready-to-eat foods.
Latest:
MS Detection of Waste in Public Swimming FacilitiesThere is often insufficient prevention to ensure safe swimming environments. Recreation water illness (RWI), most commonly in the form of digestional track illness as well as skin, ear, and respiratory infections, are often caused by water contamination from human waste. Stercobilin is a very stable and suitable chemical biomarker of human waste that has the potential to be used for waste monitoring in public swimming facilities. Using solid phase extraction (SPE) techniques paired with high-resolution mass spectrometry (HRMS), we have developed a robust method used for swimming pool water monitoring to create safer swimming environments.
Latest:
What’s the Most Meaningful Standard for Mass Spectrometry: Instrument Detection Limit or Signal-to-Noise Ratio?Do the signal-to-noise ratios presented by instrument vendors accurately reflect improvements in mass spectrometers? We review factors influencing the validity of vendor SNR specifications, and argue that the statistical alternative of instrument detection limits is more consistent with regulatory guidelines and a more relevant indicator of instrument performance.
Latest:
What’s the Most Meaningful Standard for Mass Spectrometry: Instrument Detection Limit or Signal-to-Noise Ratio?Do the signal-to-noise ratios presented by instrument vendors accurately reflect improvements in mass spectrometers? We review factors influencing the validity of vendor SNR specifications, and argue that the statistical alternative of instrument detection limits is more consistent with regulatory guidelines and a more relevant indicator of instrument performance.
Latest:
Direct Identification of Clinically Relevant Microorganisms on Solid Culture Media by Raman SpectroscopyEvaluation of the discrimination power of Raman spectroscopy in decreasing turnaround time in clinical diagnosis, when analyzing microcolonies from nine bacterial and one yeast species directly on solid culture medium after a shortened incubation time.
Latest:
Direct Identification of Clinically Relevant Microorganisms on Solid Culture Media by Raman SpectroscopyEvaluation of the discrimination power of Raman spectroscopy in decreasing turnaround time in clinical diagnosis, when analyzing microcolonies from nine bacterial and one yeast species directly on solid culture medium after a shortened incubation time.
Latest:
Direct Identification of Clinically Relevant Microorganisms on Solid Culture Media by Raman SpectroscopyEvaluation of the discrimination power of Raman spectroscopy in decreasing turnaround time in clinical diagnosis, when analyzing microcolonies from nine bacterial and one yeast species directly on solid culture medium after a shortened incubation time.
Latest:
Direct Identification of Clinically Relevant Microorganisms on Solid Culture Media by Raman SpectroscopyEvaluation of the discrimination power of Raman spectroscopy in decreasing turnaround time in clinical diagnosis, when analyzing microcolonies from nine bacterial and one yeast species directly on solid culture medium after a shortened incubation time.
Latest:
Direct Identification of Clinically Relevant Microorganisms on Solid Culture Media by Raman SpectroscopyEvaluation of the discrimination power of Raman spectroscopy in decreasing turnaround time in clinical diagnosis, when analyzing microcolonies from nine bacterial and one yeast species directly on solid culture medium after a shortened incubation time.
