New Procedures Enhance Quality Control for Large-Scale Plasma Proteomics Analyses
A new study introduces a comprehensive two-dimensional liquid chromatography coupled with tandem mass spectrometry (2D-LC–MS/MS) method for the analysis of 112 pesticides in corn-based products. The method exhibits high precision, lower limit of quantification values, and successful detection of trace levels of pesticides in real samples, offering promise for the analysis of complex matrices.
Eighty drugs prohibited in athletic competition were analyzed, with seven samples returning adverse findings compared to previous methods.
The eggs of the yellow-legged gull and Audouin’s gull and the blood of the greater flamingo were studied to assess their exposure to perfluoroalkyl substances (PFAS) as bioindicators of chemical pollution.
A biomarker with significant clinical and analytical potential in an enzyme present in many human diseases was determined at higher efficiency using liquid chromatography coupled to tandem mass spectrometry (LC–MS/MS).
Researchers have developed a novel liquid chromatography–mass spectrometry method for analyzing sialic acid linkage in N-linked glycopeptides, offering insights into glycosylation patterns.
We interviewed an AI program (ChatGPT) for LCGC North America asking questions about AI and its role in various applications for separation science to include data analysis, and high performance liquid chromatography (HPLC), hydrophilic-interaction chromatography (HILIC), reversed-phase liquid chromatography (RPLC), liquid chromatography–mass spectrometry (LC–MS), gas chromatography–mass spectrometry (GC–MS), high resolution mass spectrometry (HRIM–MS), high resolution tandem mass spectrometry (HRMS/MS), and related topics.
Webcasts
Webinar Date/Time: Tue, Jun 13, 2023 11:30 AM EDT
New statistical framework developed by researchers at the University of California in Riverside allows confident identification of isomeric molecules by mass spectrometry, even when no unique mass-to-charge peaks are generated between the isomeric pairs.
This month we interview Juan L. Benedé from the University of Valencia in Spain, about his work developing microextraction approaches, based on the use of sorbent materials, for application to complex matrices, and his focus on the determination of disease biomarkers in biofluids.
At Pittcon 2023, LCGC spoke with Jim Grinias of Rowan University. This segment is the full-length version of the interview that was conducted at the conference.
How to enhance the sensitivity, specificity, and speed of metabolite measurement using TIMS, which in turn helps to accelerate the pace of metabolomics research.
How can low-resolution mass spectrometry (LRMS) and high-resolution (HR) MS work together to provide unambiguous results in clinical and forensic toxicology?
A new study reports the development a highly sensitive LC–MS/MS method to measure salivary melatonin levels. The method has a lower limit of the measuring interval of 0.8 pg/mL, making it the most sensitive method for quantifying melatonin in saliva.
A recent study has found that using only seven points across an LC–MS/MS peak can provide sufficient accuracy and precision for drug quantitation studies in drug discovery and development, challenging the "rule-of-thumb" of using at least 15 points.
Samples of the prefrontal cortex, striatum, and hippocampus of rats were analyzed by LC–MS to assess brain tissue response to combined consumption of ethanol and cocaine.
Webcasts
Webinar Date/Time: Wed, May 31, 2023 11:00 AM EDT
Webcasts
Webinar Date/Time: Wed, Jun 28, 2023 1:00 PM EDT
A micro-pillar array format for mapping the proteome of human stem cell-derived liver organoids using timsTOF–MS is presented.
A new RPLC–MS method can map the substitution degree and composition of β-glucose monomers of cellulose ethers (CEs), providing detailed compositional distributions and constitutional isomer distributions, thereby identifying compositional variation between bio-stable and non-bio-stable CEs and unexpected methylations in EHEC samples.
A recent trend in the design of LC instrumentation is the move towards miniaturized and portable systems.
The Chromatographic Society and the Separations Science Group of the Analytical Division of the Royal Society of Chemistry are pleased to announce Emerging Separations Technologies 2023 is to be held 24–25 May 2023, at RSC Burlington House, London, UK.
A rapid and robust LC–MS/MS method for determining lactulose and rhamnose concentrations in blood plasma was used to determine intestinal permeability from blood plasma, which can help diagnose gastrointestinal diseases such as Crohn’s disease.
This method has greater sensitivity and a shorter LC analysis time than the AOAC method. It also requires less instrument maintenance, enhances column lifetime by requiring a smaller sample volume, and reduces cost by replacing acetonitrile with methanol in the mobile phase.
Selective pressurized liquid extraction and multilayer solid‑phase extraction methods are described for high‑throughput plant, soil, and water sample preparations. Optimal analytical conditions are described for the improvement of detection sensitivities and coverage. A Source Supported Suspect Screening (4S) approach is described; phytotoxins detected in the source plant were used to improve the identification of phytotoxins in soil and water.
A new approach combining high performance liquid chromatography–mass spectrometry with ultrafiltration, along with enzyme channel blocking and directional enrichment, has been found effective for screening natural histidine decarboxylase inhibitors in Radix Paeoniae alba, while reducing both false-positive and false-negative results.
