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Top articles published this week include the launch of our “From Lab to Table” content series, a Q&A interview about using liquid chromatography–high-resolution mass spectrometry (LC–HRMS) to assess chemical hazards in plastic bottles, and a piece recognizing Brett Paull for being named Tasmanian STEM Researcher of the Year.

Testosterone measurements are typically performed using serum or plasma, but this presents several logistical challenges, especially for sample collection, storage, and transport. In a recently published article, Yehudah Gruenstein of the University of Miami explored key insights gained from dried blood spot assay validation for testosterone measurement.

A recent study examines the specific traits of the intestinal microbiota and metabolites in Bactrian camels. The results of profiling 36 intestinal mucosal samples from six Bactrian camels using liquid chromatography with tandem mass spectrometry (LC-MS/MS) provides valuable data for understanding the relationship between regional intestinal immunity and the general health and disease of the host.

A recent study used gas chromatography-mass spectrometry (GC-MS) to evaluate the potential of the foliar application of C. vulgaris extract to improve crop yield, chemical composition, and antioxidant and antibacterial activities of the essential oil of spearmint.

Researchers from the University of Copenhagen (Denmark) have developed a broad screening strategy using evaporation enrichment and liquid chromatography high-resolution mass spectrometry (LC–HRMS) to evaluate migration of non-volatile chemicals from various reusable plastic bottles. LCGC International spoke to Selina Tisler, corresponding author of a paper resulting from the research, about this strategy.

A compilation of Q&A interviews on food analysis is presented here.

A liquid chromatography–tandem mass spectrometry (LC–MS/MS) method to enhance dicarboxylic acid (DCA) detection and quantification in different biological matrices has been developed and optimized.

As part of our “From Lab to Table: How Chromatography is Shaping Food Analysis” content series, we present a compilation of highlights from the Recent Advances in Food Analysis (RAFA) conference.

Research conducted by the Chinese Academy of Tropical Agricultural Sciences (Wenchang, China) investigated the changes in flavonoid metabolite profiles in coconut water from two varieties, Wenye No.5 (W5) and Hainan local coconut (CK), across six developmental stages, utilizing liquid chromatography-tandem mass spectrometry (LC–MS/MS) in their work. Their findings have repercussions in yielding coconut-based products offering superior nutritional and functional properties.

Citrinin, a hepato-nephrotoxic mycotoxin produced by fungal species, plays a crucial role in the fermentation of red rice to produce red yeast rice-based food supplements, which represent the primary source of human exposure to this contaminant. A recent study conducted by the University of Valencia and the Public Health Laboratory of Valencia (Spain) developed and validated a simple and sensitive analytical method for the citrinin determination in these products.

To determine sample patterns and identify possible markers of quality, variety, or origin to deal with authentication or fraud detection issues, researchers from the University of Barcelona’s Department of Chemical Engineering and Analytical Chemistry characterized dark chocolate samples according to geographical origin, cocoa variety, and cocoa content. Filtered extracts were analyzed by reversed-phase high performance liquid chromatography (RP-HPLC) with ultraviolet (UV) and spectrophotometric methods to establish individual phenolics and overall indexes of antioxidant and flavonoid content.

LCGC International sat down with Giorgia Purcaro of the University of Liege to discuss the impact that solid-phase microextraction (SPME) and comprehensive multidimensional gas chromatography (GC×GC) is having on food analysis.

A recent study conducted at the Department of Biotechnology of Thapar Institute of Engineering & Technology (Punjab, India) examined the isolation and characterization of catechin-producing endophytic fungi isolated from tea leaves, their chemical characterization, and associated bioactivities. LCGC International spoke to Priyankar Dey of the Thapar Institute of Engineering & Technology about the work done by his group, and the paper that resulted from it.

In this article, we review some key considerations for chromatographic technique selection and method development across the full drug process—from early-stage active pharmaceutical ingredient (API) synthesis to routine commercial release activities.

In this column, we discuss the label-free and stable isotope labeling proteomics approaches that help in biomarker discovery. We also discuss the different enrichment techniques, such as stable isotope labeling by amino acid in cell culture (SILAC), isobaric tags for relative and absolute quantitation (iTRAQ), and tandem mass tags (TMT, that help in measuring low-abundance protein biomarkers.

LCGC International spoke to Silvia Valverde and Ana María Ares of this group about their research and the resulting article.

A high performance liquid chromatography–ultraviolet (HPLC–UV)-based method was recently developed for the quantification of selpercatinib in human plasma, an advance that may lead to the reduction of adverse events as well as an optimization of efficacy.

Following the HPLC 2024 Conference in Denver, Colorado, LCGC International spoke with Anne Marie Smith of ACD/Labs about the new ICH Q14 guidelines and how they impact analytical scientists and their work.

This article describes the current highlights of using molecular imprinted polymers (MIPs) in sample preparation.

In this installment of "LC Troubleshooting," Dwight Stoll discusses several essential principles related to when and why buffers are important, as well as practical factors, such as commonly used buffering agents, that are recommended for use with different types of detectors.

Researchers measured bovine tooth enamel samples with colorimetry, high-performance liquid chromatography (HPLC), and ultraviolet-visible (UV-Vis) spectrophotometry to develop a comprehensive understanding of coffee-induced tooth discoloration by examining the individual and combined effects of CGA and pigments and determining how their concentrations are affected by coffee roast level.

Separation and Characterization of Macromolecules 11 (SCM-11) will take place from 22–24 January 2025 in Amsterdam, The Netherlands.

LCGC International spoke with Jim Gearing, Associate Vice President of Marketing, Agilent Gas Phase Separations Division; Massimo Santoro, Group Business Development Director at Markes International; Ed Connor, GC Product Manager at Peak Scientific; and Bruce Richter, Vice President of Research & Development at Restek Corporation.

LCGC International spoke to Phil Marriott and Humberto Bizzo about a recent paper they published identifying the incorrect use of retention indices in gas chromatography and how this problem can be rectified in practice.

A recent study investigating the association between dietary polyunsaturated fatty acid (PUFA) intake and estradiol levels in women in the United States utilized isotope dilution liquid chromatography–tandem mass spectrometry to measure serum estradiol levels.

Using a solid phase microextraction gas chromatography-mass spectrometry (SPME GC-MS)-based metabolomics approach, a recent study by the School of Life Sciences and Technology at Institut Teknologi Bandung (Indonesia) investigated the impact of environmental factors (including temperature, rainfall, and altitude) on volatile metabolite profiles of Robusta green coffee beans from West Java.

LCGC International sat down with Christopher Kozak, a professor at Memorial University to speak about his recent research using MALDI-TOF analysis to identify unknown blobs in Newfoundland, Canada’s Placentia Bay.

Researchers showed that a 12-week aerobic exercise regimen reduced circulating branched-chain amino acid levels in obese mice while attenuating insulin resistance.

Here is some of the most popular content posted on LCGC International this week.

Researchers used high performance liquid chromatography and untargeted metabolomics by Fourier-transform ion cyclotron resonance-mass spectrometry to highlight the critical role of root exudates in drought tolerance.