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Looking Below the Surface of Breast Tissue During SurgeryIn this article, we present a method that provides prompt detection of the presence of cancer cells inside the 2-mm margin of tissue surrounding the tumor after excision using spatially offset Raman spectroscopy (SORS). SORS was developed to detect subtle changes in soft tissue spectra in the 100–2000 ?m range and tested on excised breast tissues. The results display a very high specificity and sensitivity (100% and 95%, respectively) of classification between positive and negative tumor margins. SORS is a clinically feasible method, suitable for the real-time, intraoperative assessment of tumor margins at the micrometer level.
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Raman Spectroscopy and PolymorphismThe differentiation of polymorphs is important, particularly in the pharmaceutical industry. We demonstrate the practicality of using Raman spectroscopy to differentiate crystal forms for polymorph characterization and screening, and explain aspects of chemical bonding and solid state structure that affect the Raman spectra of crystal lattice vibrational modes.
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Solid-Phase Extraction of US EPA 535 for Chloroacetanilide and Acetamide Degradates in Drinking Water Samples Prior to Liquid Chromatography/Tandem Mass SpectrometryThe US EPA has implemented an exposure research program aimed at conducting drinking water research on methods as part of the Microbiological and Chemical Exposure Assessment. This research is aimed at evaluating the chemical pollutants and their role and levels in which there is an unacceptable risk to either humans or wildlife, as well as evaluating the methodologies currently being used to determine levels of chemical pollutants.
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Organic Nitrogen Compounds II: Primary AminesAmines, which contain carbon, hydrogen, and nitrogen, come in six varieties, but using the N-H stretching peak positions by themselves will distinguish between all the different amine types.
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AI and Satellite Spectroscopy Team Up to Monitor Urban River Pollution in ChinaA study from Chinese researchers demonstrates how combining satellite imagery, land use data, and machine learning can improve pollution monitoring in fast-changing urban rivers. The study focuses on non-optically active pollutants in the Weihe River Basin and showcases promising results for remote, data-driven water quality assessments.
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Trends in Spectroscopy: A Snapshot of Notable Advances and ApplicationsSpectroscopic measurement factors into every facet of modern life. Here, we survey noteworthy recent advances in and applications of atomic and molecular spectroscopy, touching on their uses in fields such as biomedicine, materials science, environmental monitoring, agriculture, pharmaceutical research, public safety, and more.
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Determination of Total Mercury in Fish and Biological Tissues (May 2024)Mercury content in fish is an environmental and food safety concern. Learn how fish tissue analysis is performed with no sample prep using DMA-80 evo.
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Plant Metabolomic Workflows Using Reversed-Phase LC and HILIC with ESI-TOF-MSIn plant metabolomics, molecular fingerprints and additional molecular descriptors can be identified using recent developments in polarity-extended separations with serial coupling of reversed-phase LC and HILIC combined with ESI-TOF-MS.
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Plant Metabolomic Workflows Using Reversed-Phase LC and HILIC with ESI-TOF-MSIn plant metabolomics, molecular fingerprints and additional molecular descriptors can be identified using recent developments in polarity-extended separations with serial coupling of reversed-phase LC and HILIC combined with ESI-TOF-MS.
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Plant Metabolomic Workflows Using Reversed-Phase LC and HILIC with ESI-TOF-MSIn plant metabolomics, molecular fingerprints and additional molecular descriptors can be identified using recent developments in polarity-extended separations with serial coupling of reversed-phase LC and HILIC combined with ESI-TOF-MS.
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A Robust and Sensitive Method for Detecting Glyphosate and Other Polar Pesticides in Food and Water: Multiple Analytes in a Single Injection without DerivatizationA new high-throughput LC–MS/MS method meets the challenge of eliminating matrix effects for monitoring, with high specificity, polar organic pesticides such as glyphosate in food and water, while meeting targeted limits of detection.
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A Robust and Sensitive Method for Detecting Glyphosate and Other Polar Pesticides in Food and Water: Multiple Analytes in a Single Injection without DerivatizationA new high-throughput LC–MS/MS method meets the challenge of eliminating matrix effects for monitoring, with high specificity, polar organic pesticides such as glyphosate in food and water, while meeting targeted limits of detection.
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GC×GC–MS for Forensic AnalysisForensic scientists often encounter highly complex analytical problems related to crime scenes that would benefit from the capabilities of GC×GC–MS. However, this technique has not been fully explored to help benefit forensic laboratories.
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Discrimination of Geographical Origin for Purple Sweet Potato Using Hyperspectral Imaging Combined with Multivariate AnalysisIn this study, the feasibility of the rapid discrimination of three different geographical origins of purple sweet potato with a hyperspectral imaging (HSI) system was examined.
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Rapid Screening in Microbiology by FT-IRYeast suspensions were dried and analyzed via FT-IR using an automated transmission sampling accessory. Up to six-fold sampling capacity increase may be realized through automation.
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Vibrational Spectroscopy of Individual Aerosol Droplets by Optical TweezersRaman spectroscopy, using optical tweezers, is capable of measuring the size, refractive index, and chemical composition of single aerosol droplets, at picoliter volumes. This information improves our understanding of molecular-level chemical processes within droplets.
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Vibrational Spectroscopy of Individual Aerosol Droplets by Optical TweezersRaman spectroscopy, using optical tweezers, is capable of measuring the size, refractive index, and chemical composition of single aerosol droplets, at picoliter volumes. This information improves our understanding of molecular-level chemical processes within droplets.
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Study of the Content of Inorganic Arsenic and Heavy Metals in Samples of Rice Cakes in the City of MadridStudy of the Content of Inorganic Arsenic and Heavy Metals in Samples of Rice Cakes in the City of Madrid
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Study of Heavy Metals and Methyl-Mercury in Fungi in Markets of MadridThe bioaccumulation of heavy metals can lead to disastrous effects on the environment and human health. Here, ICP-MS was applied to study 48 different mushrooms collected at local markets in Madrid, Spain, showcasing its effectiveness at detecting heavy metals in edible fungi.
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Studying Inorganic Arsenic, Heavy Metals, and Iodine in Dried SeaweedSeaweed has become a popular ingredient in Western diets. Concerns for heavy metals and inorganic arsenic have been raised as potential risks to consumers. Methods for analysis are described, including microwave digestion, HPLC, and ICP-MS for quantitation and speciation.
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Feasibility Study of Portable X-ray Fluorescence (pXRF) for the Determination of Iodine in Pharmaceutical ProductsPortable XRF has been found to be an efficient and economic analytical tool for elemental analysis in pharmaceutical products. This study explores the use of pXRF for determination of iodine in multivitamins.
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LC–MS Characterization of Mesquite Flour ConstituentsGiven the wide range in polarity of the components of mesquite flour, it is advantageous to study the health benefits of this flour using methods that combine the complementary approaches of reversed-phase and aqueous normal phase LC.
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GC-ICP-MS for Process and Quality Control in Semiconductor ManufacturingManufacturing advanced electronic devices requires the production of high-quality semiconductors and integrated circuit chips. In this article, the authors explain how GC, when coupled with ICP-MS, enables the detection of elements that are essential in semiconductor production.
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The Use of Portable Near-Infrared Spectroscopy for Authenticating Cardiovascular MedicinesPortable NIR spectroscopy is demonstrated as a rapid and mobile analysis method for authenticating cardiovascular medicines in critical situations, and to indicate whether formulations are counterfeit or substandard.
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The Use of Portable Near-Infrared Spectroscopy for Authenticating Cardiovascular MedicinesPortable NIR spectroscopy is demonstrated as a rapid and mobile analysis method for authenticating cardiovascular medicines in critical situations, and to indicate whether formulations are counterfeit or substandard.
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Tri-Range Applications of the Spectrum 3 Infrared SpectrometerTri-Range Applications of the Spectrum 3 Infrared Spectrometer
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Quantitation and Nontargeted Identification of Pesticides in Spinach Extract with GC×GC–TOF-MSIn this study of pesticides in spinach extract, the use of GC×GC–TOF-MS is demonstrated as a methodology to overcome matrix interferences and quickly quantify suspected contaminants. The approach also allows nontargeted analysis using a single sample injection.
