Liquid Chromatography (LC/HPLC)

Among the compounds of concern found in the samples were nicotine-related alkaloids, psychoactive cannabinoids, and chemicals that promoted inflammation of the respiratory system.

While both branched-chain fatty acids (BCFAs) and straight-chain fatty acids (SCFAs) were analyzed, the profiling of BCFAs was considered especially important for future metabolomics and lipidomics studies.

High-throughput proteomic research has been hampered by the limited peak capacity of one-dimensional liquid chromatography (1D-LC) separation performance.

A study conducted by researchers at Rowan University explores column selection in compact capillary liquid chromatography (LC) systems.

The two-dimensional liquid chromatography (2D-LC) separations were supplemented by the use of capillary-channeled polymer (C-CP) fiber columns.

Researchers have developed a trapping mode two-dimensional liquid chromatography (2D-LC) workflow for the enrichment and quantification of low-level impurities in pharmaceutical development, offering a promising approach for enhancing impurity monitoring in the pharmaceutical industry.

A water-resistant, highly adsorptive molecularly imprinted polymer was developed to address the issues of unstable adsorption performance and high organic solvent consumption in traditional materials.

A research team has developed a new method for the online measurement of tetraethyllead (TEL) in aqueous samples. The approach utilizes magnetism-enhanced in-tube solid phase microextraction (ME/IT-SPME) coupled with high performance liquid chromatography (HPLC) and diode array detection (DAD).

Authentication of popular ginseng-based products has been difficult and has caused confusion in quality control between traditional Chinese medicine (TCM) and Chinese patent medicine (CPM).

A research team has investigated the impact of hydrophilic/lipophilic balance (HLB) on the porogenic properties of non-ionic surfactants for chromatographic separation.

Researchers have recalibrated polyparameter linear free energy relationships (PP-LFERs) for low-density polyethylene (LDPE) passive samplers. By utilizing a robust regression method and reliable partition coefficients and solute descriptors, the recalibrated models exhibited improved predictive performance, accurately estimating LDPE-water and LDPE-air partition coefficients across a wide range of compounds.

Although closantel (CLO) is well-regarded as a curative antiparasitic drug, even low doses have been found to cause serious side effects in the human retina and central nervous system.

OECD-compliant amino acid derivative assay (ADRA) testing and method transfer to UHPLC conditions is presented.

Forsythiae fructus is a traditional Chinese medicinal herb that has been used to treat various ailments such as inflammation, fever, and infections.

LCGC was on the ground at HPLC 2023.

Examining the role that LC–MS/MS plays in metabolomics, and metabolomics’ growing importance in the field of disease biology.

This article details a recent experiment that demonstrates how nonspecific interactions can be prevented by using metal-free or low adsorption flow paths.

How to modernize an older pharmaceutical monograph from an HPLC column to an UHPLC column, along with calculated time and solvent savings.

Researchers have utilized computational fluid dynamics (CFD) simulations to optimize the design of membrane chromatography devices, enhancing fluid flow uniformity and separation efficiency.

A separation science team has developed a green and cost-effective method, called feather fiber-supported liquid extraction (FF-SLE), for determining synthetic antioxidants in edible oils.

Researchers have introduced a novel primary method utilizing gas chromatography–isotope dilution infrared spectrometry (GC–IDIR) for accurate peptide purity analysis.

Researchers have developed a robust method utilizing high-performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS) to accurately quantify amino acids in plasma, making it a valuable tool for clinical diagnostics and research in amino acid metabolism.

Enhancements in chromatographic performance were reviewed as were experimental concerns, both pointing toward using specific solvents to influence more sustainable industrial development.

Pop quiz – can you define resolution? Would you be surprised at the number of correct answers? Which one is the best for chromatographers? In this LCGC Blog, we look at the various ways resolution can be interpreted scientifically.

Levoglucosan, which is emitted from the combustion of cellulose and hemicelluloses, can be transported over a long range of time to ice caps, where it may indicate fire activity both regionally and globally.

Researchers have discovered that phospholipids form doubly charged lipid-metal ion complexes during electrospray ionization (ESI), providing valuable insights into the analysis of phospholipid structures.

Researchers have developed an ultrahigh-pressure liquid chromatography (UHPLC)—tandem mass spectrometry (MS/MS) method for the simultaneous determination of 10 aminoglycoside antibiotics in aquatic products.

Researchers have introduced MCnebula, a new framework for untargeted LC–MS/MS data analysis. MCnebula focuses on critical chemical classes and utilizes visualization techniques to streamline the analysis process, enabling efficient pathway analysis, biomarker discovery, and classification of unknown compounds beyond the limits of spectral libraries.

A new method has been developed for detecting and quantifying polycyclic aromatic hydrocarbons (PAHs) in intermediates used in plastics production. The method, based on liquid chromatography column switching, allows for the analysis of 18 PAHs and addresses the lack of regulatory oversight for PAH concentrations in plastic intermediates.

The team of researchers found that components with the same retention time can have different migration patterns, and discussed the different scenarios for decreasing column pressure resistance.