Author


Ken Rosnack

Latest:

Analytical Techniques in Exploring the Persistent Global PFAS Problem

The presence of PFAS in the environment requires governmental agencies to establish regulatory limits for PFAS in human essentials, such as drinking water. LC–MS/MS can be used to analyze a wide range of sample types containing PFAS, but avoiding PFAS contamination is critical for this technique to work effectively.


Charles J. Oberhauser

Latest:

Turbulent-Flow LC for LC–MS and LC–MS–MS Bioanalysis

This month's "Directions in Discovery" gives a brief overview of turbulent- flow liquid chromatography, a technique for fast separations. Two examples demonstrate the use of the technology for high-throughput bioanalytical separations in drug discovery.


Simona Felletti

Latest:

When van Deemter Goes Upside Down in Chiral Chromatography

The occurrence of convex-upward van Deemter curves is rare but not unusual in chiral liquid chromatography. In this work, this behaviour, experimentally observed for the more retained enantiomer of a chiral sulfoxide on a polysaccharide-based CSP, is explained.


Xiaoning Lu

Latest:

Simultaneous Analysis of Ultrashort-Chain, Alternative, and Legacy PFAS in Potable and Non-Potable Waters

A hybrid HILIC–ion exchange column was used for the analysis of ultrashort-chain per- and polyfluoroalkyl substances (PFAS) compounds in environmental waters. This direct injection LC–MS method enables simultaneous measurement of ultrashort- chain, alternative, and legacy PFAS in potable and non-potable waters.


Chris E. Freye

Latest:

How Much Data is Too Much? An Analysis of the Pros and Cons of High-Resolution Mass Spectral Data

HRMS is widely used in chromatography for analyzing complex mixtures. However, chromatographers should take note of the exponentially larger data set that HRMS provides before deciding whether to use the technique for the analysis they are conducting.


Kim F. Haselmann

Latest:

Method Development for Reversed-Phase Separations of Peptides: A Rational Screening Strategy for Column and Mobile Phase Combinations with Complementary Selectivity

This review article summarizes the results obtained from the combined efforts of a joint academic and industrial initiative to solve the real-life challenge of determining low levels of peptide-related impurities in the presence of the related biologically-active peptide at a high concentration.


Ming Yui Cheung

Latest:

Method Development for Reversed-Phase Separations of Peptides: A Rational Screening Strategy for Column and Mobile Phase Combinations with Complementary Selectivity

This review article summarizes the results obtained from the combined efforts of a joint academic and industrial initiative to solve the real-life challenge of determining low levels of peptide-related impurities in the presence of the related biologically-active peptide at a high concentration.



Liangyu Chen

Latest:

Evaluating Two Dioscin-Based Silica Stationary Phases and their Application to Achiral and Chiral Separations

Improved analysis of pharmaceutical and natural medicine products requires advances in reversed-phase LC stationary phases. We examine two synthesized stationary phases with applicability in quality control and chiral separation for analysis of natural products.


Liu Weiping

Latest:

Indirect Suppressed-Conductivity Ion Chromatography

The authors demonstrate a new detection method for various anions of weak acids separated by ion chromatography and point out the main advantages of this method.


PSG BioTech

Latest:

Introducing PSG® Biotech (Aug 2023)

PSG® Biotech offers a comprehensive portfolio of pumps, sensors and flow meters engineered to protect media integrity and product quality while producing the highest yields – from laboratory to commercial scale.


Chunxiao Jia

Latest:

Py-GC-MS Investigation of Pyrolysis Behaviours and Decomposition Products of α- and β-2,7,11-Cembratriene-4,6-Diols

The study of the thermal behaviour and pyrolysis products of these terpenoids could possibly suggest flavour precursors that could be used to provide specific flavours to tobacco.


Sonja Klee

Latest:

Nontargeted Screening for the Verification of Allergenic Ingredients and Perfume Authenticity by GC-ecTOF-MS

In this study, the experimental nontargeted screening approach and corresponding data analysis workflows—simultaneously using molecular ion information and structural information—are presented for the molecular identification and authenticity verification process from a brand perfume using GC–ecTOF-MS.


Adlai E. Niggebrugge

Latest:

Turbulent-Flow LC for LC–MS and LC–MS–MS Bioanalysis

This month's "Directions in Discovery" gives a brief overview of turbulent- flow liquid chromatography, a technique for fast separations. Two examples demonstrate the use of the technology for high-throughput bioanalytical separations in drug discovery.


Jim Garvey

Latest:

Multi-Active Method (MAM) for the Analysis of Agriculture Product Technical Ingredients and Formulated Products

A collaborative multi-analyte method developed utilizes HPLC and UHPLC to analyze more than 70 active ingredients. This method offers a validated approach for determining technical AI alongside linearity, precision, accuracy, and specificity tests for seven active ingredients.


Natasa P. Kalogiouri

Latest:

The Use of Molecular Imprinted Polymers Prior to Chromatographic Methods for the Analysis of Bisphenols in Packaged Foods

We examine the rapid growth of green microextraction techniques, such as molecular imprinted polymer solid-phase extraction (MISPE), in the field of food quality and safety, and how this technique is used for bisphenol A (BPA) analysis.


Laila Kott

Latest:

Analysis of Boronic Compounds as Potential Mutagenic Impurities in Drug Substances By GC–MS

This novel gas chromatography (GC)–MS approach enables analysis of the suspected mutagens bis(pinacolato)diboron (BPD) and tetrahydroxydiboron (BBA) found at low-levels in certain intermediates and active pharmaceutical ingredients (APIs), even in the presence of boron from other sources.


Kim Huynh-Ba

Latest:

Validation of Stability-Indicating HPLC Methods for Pharmaceuticals: Overview, Methodologies, and Case Studies

In the pharmaceutical industry, method validation is essential. But what are the best practices? We review regulatory requirements, validation parameters, methodologies, acceptance criteria, trends, and software tools.


Ute Potyka

Latest:

Analysis of Accutrace Plus Marker in Fuels with GC–MS

A new method has been developed to provide a sensitive, accurate and convenient GC–MS method to align with the new European regulation in relation to the introduction of the new Accutrace Plus marker for fuels.


Gregory O. Staples

Latest:

Troubleshooting LC Separations of Biomolecules, Part II: Passivation and Mobile-Phase Additives

If you are analyzing metal-sensitive biomolecules, and a bioinert instrument is unavailable, or insufficient, passivation or mobile-phase additives may help. Here’s how to use those solutions, with tips for avoiding potential pitfalls.


Dan Bach Kristensen

Latest:

Enhancing Peptide Mapping Sequence Coverage Through an Automated Dual Protease Digest

Trypsin is one of the most commonly used proteases in peptide mapping protocols because of its high level of specificity. However, trypsin alone is not always sufficient for full sequence coverage. In this article, the authors detail how trypsin was combined with chymotrypsin to overcome this, and the benefits of an automated platform.


J. Casanova

Latest:

Development of a Standardized Protocol for the Classification of Column Sets in Comprehensive Two-Dimensional Gas Chromatography

The article discusses the classification and characterization of GC×GC column sets based on polarity and orthogonality, introducing a standardized approach using a reference mixture called the Century Mix to evaluate the selectivity and performance of these column sets.


Maria Marinaki

Latest:

Innovation in Nutrition and Food Analysis: The FoodOmicsGR_Research Infrastructure

FoodOmicsGR_RI aims to characterize unique Greek products and highlight their value and quality using cutting-edge omics technology.


Juan Aspromonte

Latest:

Enhance the Performance of Solid-Phase Microextraction by Exploiting Vacuum-Assisted Headspace and Multicumulative Trapping for Olive Oil Characterization

Headspace-solid-phase microextraction (HS-SPME) is widely used for the analysis of volatile compounds from different kinds of samples.


Guangyu Liu

Latest:

Enhancing Flame Ionization Detector Capabilities with Post-Column Reaction

The incorporation of a post-column reaction using a 3D-printed, two-stage microreactor is showing groundbreaking performance improvements for flame ionization detection in many gas chromatography applications—and delivers carbon universal response.


Andrea Krumm

Latest:

The Future of Biomolecule Analysis Using HPLC/UHPLC

The evolution of biomolecule analysis is discussed in this article.


SPEX

Latest:

Trace Elements in Fish Oil and Fish Oil Supplements

The U.S. Food and Drug Administration and the EPA advised pregnant women and those who might become pregnant to avoid certain fish known to be high in mercury. This study will investigate trace element concentrations including heavy metal concentrations in different types of fish and fish oil supplements available from local markets in New Jersey.


Anna-Marie Cook

Latest:

Identification of Microplastics in Environmental Monitoring Using Pyrolysis–GC–MS Analysis

Pyrolysis–gas chromatography–mass spectrometry has advantages for the analysis of environmental microplastic samples compared to other leading analytical methods, including spectroscopic techniques.


Peter Schoenmakers

Latest:

Separation and Characterization of Macromolecules: SCM-11 Preview

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


Activated Research

Latest:

ChromTalks: The Benefit of Hindsight in Chromatography

***Thursday and Friday May 13-14 | May 20-21, 2021*** In the relaxed and unconventional talks in this symposium, highly experienced speakers from industry and academia will impart key learnings from their long experience with chromatography—from heroic failures that have taught them valuable lessons, to moments of inspirational serendipity, and everything in between. CHROMTalks will deliver lifetimes of learning in condensed form, covering topics across implementation, troubleshooting, and method development of analytical techniques. Time spent at CHROMTalks will pay back as soon as you enter your laboratory! ***Available On Demand Until May 21, 2022***