The morphology and gap spacing of nano-island film SERS substrates are key factors defining the properties of analyte‒substrate interactions. These results of the study described here have implications for understanding signal variation in SERS and in designing future SERS assays.
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The Emerald Conference is the most advanced technical and comprehensive science conference in the cannabis industry. It is the leading industry forum for discussion on discovery science, as well as how science and data support best practices in cultivation, production, and quality assurance. The Emerald Conference has become a must-attend event for scientists in analytical testing, cultivation & extraction science, pre-clinical research and development, and formulations.
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Amines, 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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Polydimethylsiloxane (PDMS) compounds are ubiquitous; thus it is challenging to develop analytical methods that ensure their absence. A newly developed method combining sizeexclusion chromatography with inductively coupled plasma–optical emission spectroscopy makes it possible to quantify ultratrace levels of PDMS in volatile and nonvolatile organic solvents. A complete range of molecular weights can also be distinguished with this approach.
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Mid-infrared spectroscopy is applied as a primary technique to better understand the bio- and ultraviolet-transformation of soil microbial biomass. Soil microbial biomass constitutes as much as 50% organic carbon in soil organic matter, and therefore plays a crucial role in soil-atmospheric chemistry. In this study, the spatial distribution of microbial-derived organic structures on kaolinite and montmorillonite clay minerals was investigated.
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An arsenic speciation method using LA–ICP-MS was developed to provide a more accurate procedure for the determination of arsenic species in marine oils. It was validated for the analysis of five arsenic species in krill oil, and should also prove useful when quantitating inorganic arsenic species in other marine oils.
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A new application of surface-enhanced Raman spectroscopy (SERS) is described for quantifying low concentrations of pathogens with high reproducibility. In this novel assay, bacteria are captured and isolated using functionalized metal nanoparticles for rapid optical identification via SERS. Initial tests with a portable SERS system validated the ability to identify the presence of Escherichia coli and methicillin-resistant Staphylococcus aureus bacteria.
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The challenge of tackling neurogenerative diseases like Parkinson’s and Alzheimer’s leads researchers to study the role of metals, for which atomic spectroscopy tools have become essential. Dominic Hare, the 2019 winner of the Emerging Leader in Atomic Spectroscopy award, presented by Spectroscopy, is a forerunner in the use of laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) to image metals in biological tissue as part of the work to improve our fundamental understanding of neurodegenerative diseases. He recently spoke to us about this work.
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Mass Calibration in ICP-MS
By LGC Standards Learn
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By David Tuschel
When stress is applied to an object, it can produce strain. Strain can be detected through changes in peak position and bandwidth in Raman spectra. Here, we show examples of how strain in technologically impor tant materials appears in the Raman spectra.
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The use of reference materials to align or test the wavelength–wavenumber axis for optical spectroscopy is essential for quantitative and qualitative methods. This article provides details for using reference materials with ultraviolet, visible, near-infrared, infrared, and Raman spectroscopy methods.
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The Food and Drug Administration (FDA) has issued an updated version of its Compliance Policy Guide for Pre-Approval Inspections (PAI). This article will guide you on this policy’s impact on analytical procedures and data included within regulatory submissions.
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LIBS has transitioned from a method found only in research laboratories, to a technique in wide use in commercial settings. Several leading LIBS experts share their views on how the technique has developed and where it is heading.
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Shimadzu’s universal, research-grade UV-2600i/2700i spectrophotometers are ideal for a wide range of applications, with the capability of measuring very high absorbing samples and expandability to 1400nm. Learn more
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