Liquid Chromatography (LC/HPLC)

New method enables comprehensive analysis of secondary formation markers in ambient organic aerosols, providing valuable insights into atmospheric pollutants using HPLC–ESI-TOF-MS.

The development of a newly-designed Girard's reagent, HBP, as charged isobaric mass tags has enabled selective capture and sensitive detection of aldehyde metabolites. The LC–dNLS-MS/MS screening approach using this reagent has successfully facilitated the discovery of natural aldehydes and their profiling in complex samples.

Researchers have developed an innovative strategy for compound annotation in offline 2D-LC–MS analysis. The approach combines hand-in-hand alignment with targeted molecular networking (TMN) and was successfully applied to analyze the chemical profile of Yupingfeng (YPF), a traditional Chinese medicine prescription, resulting in the identification of 497 compounds and demonstrating its efficiency and scalability in complex sample analysis.

Samples of honey, chicken breast, and environmental water were analyzed for residue of nitroimidazoles, which are common antibiotics but can have detrimental effects on humans.

Adjustable polyacrylamide stationary phases developed by researchers enhance separation performance in liquid chromatography, according to a recent publication. The study demonstrates the synthesis of vinyl modified silica and the successful preparation of polyacrylamide modified silica (PAM-SIL) stationary phases, allowing for fine control of separation performance.

A newly developed UHPLC–MS/MS method allows for the accurate analysis of bioactive compounds, including apigenin, apigenin 7-glucoside, and chlorogenic acid, in goat serum.

The latest research news and news in brief.

This article explores what this transition to newer technology looks like, with an example applied to determining organic impurities of pramipexole dihydrochloride.

Applying headspace-SIFT-MS to untargeted screening of food products and ingredients.

Why is SFC becoming increasingly more important as a sustainable analytical technique?

Recombinant adeno-associated viruses (rAAV) have been the subject of much scientific investigation as their use in gene therapy enters the mainstream.

In a talk at ASMS 2023, Rebecca L. Beres of the University of North Carolina at Chapel Hill focused on two types of analysis methods: liquid chromatography coupled to tandem mass spectrometry (LC–MS/MS) and a liquid chromatography, ion mobility spectrometry, and mass spectrometry (LC–IMS-MS) platform.

Researchers have developed polyacrylamide hydrophilic stationary phases with adjustable performance. The innovative approach allows for customized separation capabilities, enhancing the efficiency and versatility of chromatographic techniques. The findings open up new possibilities for natural product chemistry and pharmaceutical research.

Researchers achieve a breakthrough in countercurrent chromatography, successfully separating three types of sanshools from Zanthoxylum bungeanum oleoresin, paving the way for enhanced purification and isolation of valuable compounds.

Several factors strongly influence separation speed, including the pressure available to drive the separation, column temperature, particle size, and column length. Developing efficient methods to improve speed while not sacrificing accuracy require an understanding of the abovementioned variables and analysis time.

Nonspecific adsorption leads to poor peak shapes and poor performance from HPLC systems, but coating-enabling technologies can serve as a potential solution. We explain how.

What you need to know about pharmaceutical regulations as an analytical chemist is provided here, including an explanation about how working in a Good Manufacturing Practice (GMP) environment can yield positive results.

Characterizing lipid nanoparticles (LNPs) is a developing delivery modality in biotherapeutic analysis. We address some of the current challenges and opportunities in this field, including an examination of the most common tools used to characterize LNPs.

Are analytical chemists really operating sustainable laboratories, or are they being too quick in marketing their “green” laboratory credentials?

This study suggests a 2D-LC screening method to evaluate peak purity and ensure specificity in pharmaceutical analysis, thereby promoting the safe production of medicines by detecting active pharmaceutical ingredients (API) and related substances.

Building up knowledge of how different factors affect resolving power from a theoretical point of view, as well as what changes are possible within practical constraints, is powerful when we are confronted with a separation that needs to be improved, or when an existing separation is not performing as expected.

Nonspecific adsorption leads to poor peak shapes and poor performance from HPLC systems, but coating-enabling technologies can serve as a potential solution. We explain how.

The latest developments and challenges of using liquid chromatography (LC) for copolymer analysis are discussed.

Metal organic frameworks (MOFs) and ionic liquids (ILs) combine to form a powerful gas chromatography stationary phase, enabling improved separation properties and expanded application possibilities. This innovative system offers enhanced separation capabilities and paves the way for advancements in gas chromatography analysis.

Superficially porous particle (SPP) column technology is leveraged to optimize high-throughput HPLC methods for small-molecule drug discovery, resulting in improved efficiency and reduced runtime.