Liquid Chromatography (LC/HPLC)

The concept of gradient delay volume (GDV) in liquid chromatography (LC) poses challenges for both beginners and experienced practitioners. The GDV, which affects the arrival time of mobile phase composition changes at the column inlet, can have a significant impact on method throughput, influencing the time required for mobile phase changes at both the beginning and end of the LC method. Different pump designs and column characteristics affect efficient use of the available analysis time, as well as overall throughput. Notably, achieving repeatable equilibration, rather than full equilibration of LC columns following mobile phase gradients, is often sufficient for many LC applications, which can also be leveraged to increase method throughput.

Scientists from Murcia, Spain recently created a new method for mycotoxin screening in human tissues using dispersive liquid–liquid microextraction and liquid chromatography–mass spectrometry.

Sara E. Kern and her team of the U.S. Food and Drug Administration (FDA) tested different analysis methods for rapidly screening for poppy seeds in food samples.

A session focusing on important developments in high-throughput analysis in the pharmaceutical sector using LC–MS kicked off Monday morning at Pittcon 2024.

Alyssa Sanchez of Florida International University presented her research on profiling the decomposition of heroin from South America, Mexico, Southwest and Southeast Asia.

Lidia Montero and Miguel Herrero from the Institute of Food Science Research in Spain discuss the evolving role of comprehensive two-dimensional liquid chromatography (LC×LC) and multi-second dimension LC×LC (multi-2D LC×LC) in food analysis.

The 18th International Symposium on Hyphenated Techniques in Chromatography and Separation Technology will take place from 28–31 May 2024 in Leuven, Belgium.

Researchers from Nanjing University of Chinese Medicine leveraged ultrahigh-pressure liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (UHPLC–QTOF-MS) and network pharmacology to identify potential quality markers of three processed Qingpi products and elucidate their mechanism in liver disease treatment.

Researchers employed advanced chromatography and mass spectrometry techniques to unravel the chemical components and metabolites of Lingbao Huxin Dan, pinpointing its therapeutic potential for cardiovascular ailments.

A recent study examined using liquid chromatography methods for determining analytes in antioxidative molecules.

Wolfgang F. Lindner and Martina Catani are the winners of the 17th annual LCGC Lifetime Achievement and Emerging Leader in Chromatography Awards, respectively. These awards honor the work of talented separation scientists at different stages in their career. The award winners will be honored in March in an oral symposium at the Pittcon 2024 conference in San Diego, California.

High performance anion-exchange chromatography coupled with pulsed amperometric detection (HPAEC-PAD) is a potential method of choice for the analysis of carbohydrates.

In this installment, I illustrate the impact of different gradient delay volumes when transferring a method between instruments and discuss some strategies that can be used to mitigate these challenges.

Scientists in Mexico developed a new method for detecting herbicides in agricultural soil, being based on techniques like 9-fluorenylmethyl chloroformate (FMOC-Cl) and ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS).

Weronika Hewelt-Belka, an assistant professor at Gdańsk University of Technology in Poland, answers questions about her research analyzing GM3 gangliosides in human milk, elucidating their molecular distribution and dynamic changes throughout lactation.

High performance liquid chromatography (HPLC) was paired with both diode array and fluorescence detection (DAD and FLD, respectively) to measure Edam cheese for its total and acid-soluble whey content.

This study of the perennial herb also known as madimak (or Indian knotgrass) aimed to simultaneously determine phenolic compounds to gain more insights into their antioxidant or antimicrobial capabilities.

A recent study from the Shangdong Academy of Chinese Medicine examined chicory using a novel UHPLC–HRMS technique and rats as the test subject.

Herbert Knauer founded his namesake laboratory equipment company with his wife Roswitha in Berlin in 1962.

Scientists from Utah and Ireland recently created a liquid chromatography–mass spectrometry (LC–MS) analytical method capable of detecting phototoxins in essential oils.

Researchers from Italy, Spain, and Turkey employed online high performance liquid chromatography (HPLC) to analyze various extracts of Leonurus cardiaca, revealing potent antioxidant properties and promising antibiofilm activity.

LCGC and Spectroscopy Editor Patrick Lavery spoke with Oligo Factory CEO Chris Boggess about the company’s recently attained compliance with Good Manufacturing Practice (GMP) International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use (ICH) Expert Working Group (Q7) guidance and its distinction from Research Use Only (RUO) and International Organization for Standardization (ISO) 13485 designations.

A review of advances in mRNA analysis using LC and LC–MS.